load_checkpoint.sh #40

#!/bin/bash
#------------------------------------------------------------------------------
### WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
### THIS SCRIPT SHOULD BE USED WITH GREAT CAUTION.
#------------------------------------------------------------------------------
# Copyright and license info is available in the LICENSE file included with
# the Server Deployment Package (SDP), and also available online:
# https://swarm.workshop.perforce.com/projects/perforce-software-sdp/view/main/LICENSE
#------------------------------------------------------------------------------
set -u

# To see documentation for this script, run:
# load_checkpoint.sh -man

#==============================================================================
# Declarations and Environment

declare ThisScript=${0##*/}
declare CmdLine="$0 $*"
declare ThisUser=
declare Version=3.0.1
declare -i SilentMode=0
declare -i GenSSLCertsIfNeeded=1
declare -i LicenseFileNeeded=1
declare -i StartWithoutLicenseFile=0
declare -i GetLatestCheckpoint=0
declare -i GetLatestJournals=0
declare -i DoVerify=0
declare -i DoSchemaUpgrade=1
declare -i ReplayJournalsOnly=0
declare -i LoadLiveJournal=0
declare -i ErrorCount=0
declare -i WarningCount=0
declare -i Debug=${SDP_DEBUG:-0}
declare DefaultVerifyOptions="-o MISSING"
declare DefaultVerifyDelay="600"
declare VerifyOptions=
declare VerifyDelay=
declare -i i=0
declare -i j=0
declare Checkpoint=
declare ParallelCheckpointDir=
declare CheckpointMD5=
declare -i DoParallelCheckpoints=
declare Threads=4
declare JournalCounter=
declare SDPInstance=
declare SDPInstanceVarsFile=
declare OfflineDB=
declare OfflineDBUsableFile=
declare CaseMode=
declare CaseFlag=
declare CompressFlag=
declare P4BrokerCfg=
declare SetServerID=
declare ReplicaTypeTag=
declare InferredReplicaTypeTag=
declare ThisHost=${HOSTNAME%%.*}
declare P4DInitScript=
declare P4DServiceName=
declare -i UseSystemdForP4D=0
declare P4BrokerInitScript=
declare P4BrokerServiceName=
declare -i UseSystemdForP4Broker=0
declare Datestamp=
declare INode1=
declare INode2=
declare -i JournalCount=0
declare -a Journals
declare MaxStopDelay=
declare -i StopVerified=
declare H1="=============================================================================="
declare H2="------------------------------------------------------------------------------"
declare Log=
declare DBSizes=
declare DiskSpaceAvail=
declare CheckpointsDir=
declare JournalPrefix=

# Safety Factor is the multiple of curret db.* files needed to allow
# the.  Using '-F=0' bypasses the disk space check.
declare SafetyFactor=1.2

#==============================================================================
# Local Functions

function msg () { echo -e "$*"; } 
function msgn () { echo -e -n "$*"; } 
function dbg () { [[ "$Debug" -eq 0 ]] || msg "DEBUG: $*"; } 
function errmsg () { msg "\\nError: ${1:-Unknown Error}\\n"; ErrorCount+=1; }
function warnmsg () { msg "\\nWarning: ${1:-Unknown Warning}\\n"; WarningCount+=1; }
function bail () { errmsg "${1:-Unknown Error}"; exit "$ErrorCount"; }

#------------------------------------------------------------------------------
# Infer the replica type from the ServerID if possible (if the SDP Server Spec
# Naming Standard was followed).
#
# Function: infer_replica_type_tag ($serverID)
function infer_replica_type_tag () {
   local serverID=${1:-}
   local inferredReplicaTypeTag=

   [[ -n "$serverID" ]] || return

   # Short circuit if we're on the commit server.
   # shellcheck disable=SC2153
   if [[ "$P4MASTER_ID" == "$SERVERID" ]]; then
      echo commit
      return
   fi

   # To get the type tag from the ServerID, trim the 'p4d_' prefix ...
   inferredReplicaTypeTag=${serverID#p4d_}
   # then trim the "_<SiteTag>" suffix ...
   inferredReplicaTypeTag=${inferredReplicaTypeTag%%_*}
   # and finally remove numbers, as the naming standard allows
   # for things like p4d_ha2_nyc or p4d_edge2_syd, and we don't
   # want the numbers in the type tag.
   inferredReplicaTypeTag=${inferredReplicaTypeTag/[0-9]*/}
   echo "$inferredReplicaTypeTag"
}

#------------------------------------------------------------------------------
function user_confirmation_and_warning () {
   local interactive=${1:-1}
   local input=""
   msg "\\n
==============================================================================
WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING\\n

This script will remove files in P4ROOT and the offline_db folder,
including db.* files, state* files, and others.

It is STRONGLY recommended that these files be preserved first unless
it is absolutely certain they will never potentially be useful in any
recovery scenario. See the '-R' option.

This is being run on host $HOSTNAME at $(date).

WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
==============================================================================
\\n\\n"

   if [[ $interactive -eq 0 ]]; then
      msg "Bypassing interactive confirmation due to -y on command line."
      return 0
   fi

   if [[ ! -t 0 ]]; then
      errmsg "Interactive confirmation not bypassed with '-y' and /dev/null provided as input. Aborting."
      return 1
   fi

   while [[ -z "$input" ]]; do
      msgn "\\nEnter Y to proceed, N to stop [y/Y/n/N]:  "
      read -r -e input
      if [[ "${input^^}" == "Y" ]]; then
         continue
      elif [[ "${input^^}" == "N" ]]; then
         msg "Confirmation to proceed not received."
         return 1
      else
         input=
      fi
   done

   return 0
}

#------------------------------------------------------------------------------
# Function: terminate
function terminate
{
   # Disable signal trapping.
   trap - EXIT SIGINT SIGTERM

   dbg "$ThisScript: EXITCODE: $ErrorCount"

   msg "\\nLog is: $Log\\n${H1}"

   # With the trap removed, exit.
   exit "$ErrorCount"
}

#------------------------------------------------------------------------------
# Function: usage (required function)
#
# Input:
# $1 - style, either -h (for short form) or -man (for man-page like format).
# The default is -h.
#
# $2 - error message (optional).  Specify this if usage() is called due to
# user error, in which case the given message displayed first, followed by the
# standard usage message (short or long depending on $1).  If displaying an
# error, usually $1 should be -h so that the longer usage message doesn't
# obscure the error message.
#
# Sample Usage:
# usage
# usage -h
# usage -man
# usage -h "Incorrect command line usage."
#------------------------------------------------------------------------------
function usage
{
   declare style=${1:--h}
   declare errorMessage=${2:-Unset}

   if [[ "$errorMessage" != Unset ]]; then
      msg "\\n\\nUsage Error:\\n\\n$errorMessage\\n\\n"
   fi

   msg "USAGE for $ThisScript v$Version:

$ThisScript {<checkpoint> [<jnl.1> <jnl.2> ...] | -latest | -latest_jnls | -jo <jnl.1> [<jnl.2> ...] | -jo_latest } [-R|-F <SafetyFactor>] [-i <instance>] [-s <ServerID>] [-t <Type>] [-no_start | [-no_xu] [-verify {default|\"Verify Options\"} [-delay <delay>]]] [-c] [-l] [-r] [-b] [-y] [-L <log>] [-si] [-d|-D]

or

$ThisScript [-h|-man]
"
   if [[ $style == -man ]]; then
      msg "
DESCRIPTION:
	This script can load a specified checkpoint and/or numbered journals
	into P4ROOT (/p4/N/root) and/or /p4/N/offline_db (where 'N' is the SDP
	instance name). It supports a variety of use cases for replaying
	checkpoints and journals, including:

	* Seeding or Reseeding a replica or edge server.
	* Loading a checkpoint on the commit, e.g. in a recovery scenario.

	Checkpoints and/or journals can be specified in one of two ways: they can
	be specified as parameters to this script, or they can be determined by
	this script if they appear in the SDP standard location according to the
	journalPrefix standard.  They key methods are:

	* Specify the path to the checkpoint to replay. The checkpoint can be in the
	form of a compressed .gz file, an uncompressed checkpoint file, or a directory
	(for parallel checkpoints).
	* Use '-latest' to have this script find the latest checkpoint available. For
	a commit server, /p4/N/checkpoints/p4_N is searched. For other servers, their
	journalPrefix is used. The timestamp on the latest available *.md5 file is
	used to determine what checkpoint is the latest available, regardless of
	checkpoint form (compressed or uncompressed file, or a directory for parallel
	checkpoints).
	* Use '-latest_jnls' to find the latest checkpoint as with '-latest', and then
	also find and replay any available subsequent numbered journals.
	* Use '-jo' (\"journal only\") to specify path(s) to one or more numbered
	journals to be supplied as parameters to this script. Journal files provided
	may be compressed or uncompressed.
	* Use '-jo_latest' to find any numbered journals available to be replayed
	based on the journal counter of the data set.

	At the start of processing, preflight checks are done. Preflight checks
	include:
	* The specified checkpoint and corresponding *.md5 file must exist.
	* The specified checkpoint can be a compressed or uncompressed file or a
	directory (for parallel checkpoints).
	* All journal files to replay (if any are specified) must exist.
	* The \$P4ROOT/server.id file must exist, unless '-s' is specified.
	* If the \$P4ROOT/server.id file exists and '-s' is specified, the values
	must match.
	* The \$P4ROOT/license file must exist, unless '-l' is specified or if
	the replica type does not require a license (such as an edge server).
	* The SDP structure and key files must exist.
	* Disk space checks are done to attempt to determine if sufficient space
	is available to replay the checkpoint.

  	If the preflight passes, the p4d_N service is shutdown. The p4broker_N
	service is shutdown if it is configured.

	If a P4LOG file exists, it is moved aside so there is a fresh p4d server
	log corresponding to operation after the checkpoint load.

	If a P4JOURNAL file exists, it is moved aside as the old journal data is
	no longer relevant after a checkpoint replay. (Exception: If the P4JOURNAL
	is speciffed in a list of journals to reply, then it is not moved aside).

	Next, any existing state* files in P4ROOT are removed.

	Next, any existing database it is files in P4ROOT are preserved and moved aside,
	unless '-R' is specified to remove them.

	Next, the specified checkpoint is loaded. Upon successful completion,
	'p4d -xu' is executed (by default) to help ensure the service can be started
	with the p4d binary used to replay the checkpoint.  Then the Helix Core
	service is started with the current p4d binary.

	If the server to be started is a replica, the serviceUser configured for
	the replica is logged into the P4TARGET server.  Any needed 'p4 trust' and
	'p4 login' commands are done to enable replication.

	Note that this part of the processing will fail if the correct super user
	password is not stored in the standard SDP password file,

	/p4/common/config/.p4passwd.p4_N.admin

	After starting the server, a local 'p4 trust' is done if needed, and then
	a 'p4login -service -v' and 'p4login -v'.

	By default, the p4d_N service is started, but the p4broker_N service is not.
	Specify '-b' to restart both services.

	Finally, the offline_db is rebuilt using the same specified checkpoint and
	journals.

ARGUMENTS AND OPTIONS:
 <checkpoint>
	Specify the path to the checkpoint file or directory to load. Exactly one
	checkpoint must be specified. If a checkpoint file is specified, a serial
	checkpoint replay will be done. If a checkpoint directory is specified,
	a parallel replay will be done using the individual files in the
	directory.

	For checkpoint files:

	The file may be a compressed or uncompressed checkpoint, and it may be a case
	sensitive or case-insensitive checkpoint.  The checkpoint file must have a
	corresponding *.md5 checksum file in the same directory, with one of two name
	variations: If the checkpoint file is /somewhere/foo.gz, the checksum file may
	be named /somewhere/foo.gz.md5 or /somewhere/foo.md5.

	For checkpoint directories:

	This option is required unless the '-latest' option is used.

 <jnl.1> [<jnl.2> ...]
	Specify the path to the one or more journal files to replay after the
	checkpoint, in the correct sequence order.

 -latest
	Specify this as an alternative to providing a specific checkpoint file or
	directory.  The script will then search for the latest *.md5 file in the
	standard checkpoints directory and use that to replay.

	The most recent *.md5 file determines which checkpoint to load, be it a
	file or directory (for parallel checkpoints).

	This option is mutually exclusive with '-latest_jnls'.

 -latest_jnls
	This option is similar to '-latest'.  However, with '-latest_jnls', in
	addition to replaying the latesst checkpoint, any subsequent numbered
	journals available in the standard checkpoints directory are also
	replayed.

	This option will only replay numbered journals, not the live P4JOURNAL
	file. However, if the \$P4JOURNAL is provided, then it will be
	replayed after all available numbered journals are replayed.

	This option is mutually exclusive with '-latest'.

	If used with '-jo', where the checkpoint and possibly some numbered
	journals will already have been replayed into P4ROOT, then the meaning
	of this option changes.  It will replay needed numbered journal up to
	the latest available, so long as those journals appear in the standard
	checkpoints directory with the usual naming convention. With this option,
	the journal needed are calculated based on the journal counter stored in
	database in the P4ROOT dir.

 -R	Specify '-R' to remove db.* files in P4ROOT rather than moving them aside.

	By default, databases are preserved for possible future for investigation.
 	A folder named 'MovedDBs.<datestamp>' is created under the P4ROOT directory,
	and databases are moved there.

	Keeping an extra set of databases requires sufficient disk space to hold
	the extra set of db.* files.

	If -R specified, old databases in P4ROOT are removed, along with state*
	and other files, and the server.locks directory.

 -F <SafetyFactor>
	When replacing an existing set of db.* files, a safety factor
	is used. This is simply the factor by which the size of pre-existing
	databases is multiplied when comparing against available disk space.

	Specify '-F 0' to disable the safety factor check.

	The disk space safety check is only meaningful if P4ROOT was previously
	populated with a full set of data.

	Specifying a nubmer greater than 1, say 1.2 (the default) gives more
	breathing room.

	Specifying a value lower than 1, say 0.95, may be OK if you are certain
	the expanded-from-a-checkpoint db.* files are significantly smaller
	than size the prior set of db.* files.

	This option is mutually exclusive with '-R'. If '-R' is used, databases
	are removed, and there is no need to calculate disk space.

 -i <instance>
	Specify the SDP instance. This can be omitted if SDP_INSTANCE is already
	defined.

 -s <ServerID>
	Specify the ServerID.  This value is written into \$P4ROOT/server.id file.

	If no \$P4ROOT/server.id file exists, this flag is required.

	If the \$P4ROOT/server.id file exists, this argument is not needed. If this
	'-s <ServerID>' is given and a \$P4ROOT/server.id file exists, the value in
	the file must match the value specified with this argument.

 -t <Type>
	Specify the replica type tag if the checkpoint to be loaded is for an edge
	server or replica. The set of valid values for the replica type
	tag are defined in the documentation for mkrep.sh.  See: mkrep.sh -man

	If the type is specified, the '-s <ServerID>' is required.

	If the SDP Server Spec Naming Standard is followed, the ServerID
	specified with '-s' will start with 'p4d_'. In that case, the
	value for '-t edge' value is inferred, and '-t' is not required.

	If the type is specified or inferred, certain behaviors change based
	on the type:
	* If the type is edge, only the correct edge-specific subset of database
	tables are loaded.
	* The P4ROOT/license file check is suppressed unless the type is
	ha, ham, fs, for fsm (standby replicas usable with 'p4 failover').

	Do not use this '-t <Type>' option if the checkpoint being loaded is
	for a commit server.

	For an edge server, an edge seed checkpoint created with edge_dump.sh
	must be used if the edge is filtered, e.g. if any of the *DataFilter
	fields in the server spec are used. If the edge server is not filtered
	by means other than being an edge server (for which certain tables are
	filtered by nature), a standard full checkpoint from the commit can be
	used.

	For a filtered forwarding replica, a proper seed checkpoint must be
	loaded.  This can be created on the commit using key options to p4d,
	including '-P <ServerID> -jd <SeedCkp' on the commit (possibly using
	the 'offline_db' to avoid downtime, similar to how edge_dump.sh
	works for edge servers).

	WARNING: While this script is useful for seeding a new edge server, this
	script is NOT to be used for recovering or reseeding an existing edge server,
	because all edge-local database tables (mostly workspace data) would be lost.
	To recover an existing edge server, see the recover_edge.sh script.

	Warning: If this option is specified with the incorrect type for the
	checkpoint specified, results will be unpredictable.

 -verify default [-delay <delay>]
 -verify \"Verify Options\" [-delay <delay>]

	Specify '-verify' to initiate a call to 'p4verify.sh' after the server
	is online. On a replica, this can be useful to cause the server to pull
	missing archive files from its P4TARGET server. If this load_checkpoint.sh
	script is used in a recovery situation for a commit server, this '-verify'
	option can be used to discover if archive files are missing after the
	metadata is recovered.

	The 'p4verify.sh' script has a rich set of options. See 'p4verify.sh -man'
	for more info.  The options to pass to p4verify.sh can be passed in a
	quoted list, or '-verify default' can be used to indicate these default
	options:

	$DefaultVerifyOptions

	By default, a fast verify is used if the p4d version is new enough (2021.1+).
	See 'p4verify.sh -man' for more information, specifically the description
	of the '-o MISSING' option.

	In all cases, p4verify.sh is invoked as a background process; this
	load_checkpoint.sh script does not wait for it to complete. The p4verify.sh
	script will email as per normal when it completes.

	The optional delay option specifies how long to wait until kicking off the
	p4verify.sh command, in seconds. The default is $DefaultVerifyDelay seconds.
	This is intended to give the replica time get get caught up with metadata
	before the archive pulls are scheduled. The delay is a workaround for job079842.

	This option is cannot be used with '-no_start'.

 -c	Specify that SSL certificates are required, and not to be generated with
	'p4d_N -Gc'.

	By default, if '-c' is not supplied and SSL certs are not available, certs
	are generated automatically with 'p4d_N -Gc'.

 -l	Specify that the server is to start without a license file. By default, if
	there is no \$P4ROOT/license file, this script will abort.  Note that if '-l'
	is specified and a license file is actually needed, the attempt this script makes
	to start the server after loading the checkpoint will fail.

	If '-t <type>' is specified, the license check is skipped unless the type is
	'ha', 'ham', 'fs,' or 'fsm'.  Replicas that are potential targets for a 'p4
	failover' need a license file for a failover to work.

 -r	Specify '-r' to replay only to P4ROOT.  By default, this script replays both
	to P4ROOT and the offline_db.

 -no_start
	Specify '-no_start' to avoid starting the p4d service after loading the
	checkpoint.

	This option is cannot be used with '-verify'.

 -no_xu
	Specify '-no_xu' to skip the 'p4d -xu' step that upgrade the database schema.

	By default, a 'p4d -xu' is done to help ensure the service can be started
	with the current p4d binary after the checkpoint is replayed.

	If the p4d binary used to replay the checkpoint is a newer major version
	than the one used to create the checkpoint, the service will not start
	after the replay until the 'p4d -xu' step is done.  If this '-no_xu' option
	is used and the p4d binary is a newer major version, have a plan to get
	the 'p4d -xu' done before the service is started.

	In EXAMPLES below, see the example titled \"Multi Pass Replay of Checkpoints
	and Journals\" for an example of using this option as part of a migration
	procedure.

 -jo <jnl.1> [<jnl.2> ...]
	Specify '-jo' to replay only one or more numbered journals without
	first replaying a full checkpoint.  With this option, the cleanup that
	normally occurs before the replay is disabled. The db.* and state* files
	in P4ROOT, as well as P4LOG and P4JOURNAL files, etc. are left in place.

	With '-jo', the paths to journal files must be specified.

	This option is mutually exclusive to the similar option '-jo_latest'.

	This option implies '-r'.

 -jo_latest
	Specify '-jo_latest' to replay only one or more numbered journals without
	first replaying a full checkpoint.  With this option, the cleanup that
	normally occurs before the replay is disabled. The db.* and state* files
	in P4ROOT, as well as P4LOG and P4JOURNAL files, etc. are left in place.

	With '-jo_latest', numbered journals to replay are calculated and determined,
	not specified as parameters.

	This option is mutually exclusive to the similar option '-jo'.

	This option implies '-r'.

 -b	Specify '-b' to start the a p4broker process (if configured).  By default
	the p4d process is started after loading the checkpoint, but the p4broker
	process is not. This can be useful to ensure the human administrator has
	an opportunity to do sanity checks before enabling the broker to allow
	access by end users (if the broker is deployed for this usage).

 -y	Use the '-y' flag to bypass an interactive warning and confirmation
	prompt.

 -L <log>
	Specify the path to a log file.  By default, all output (stdout and stderr)
	goes to:
	/p4/<instance>/logs/${ThisScript%.sh}.<timestamp>.log

	NOTE: This script is self-logging.  That is, output displayed on the screen
	is simultaneously captured in the log file.  Do not run this script with
	redirection operators like '> log' or '2>&1', and do not use 'tee.'

 -si	Operate silently.  All output (stdout and stderr) is redirected to the log
	only; no output appears on the terminal.
      
 -d     Set debugging verbosity.

 -D     Extreme debugging verbosity using bash 'set -x' mode.

HELP OPTIONS:
 -h	Display short help message
 -man	Display man-style help message

USAGE TIP:
	All the non-interactive examples below illustrate the practice of using
	redirects to create an extra log file named 'load.log' in the \$LOGS
	directory for the instance. This load.log file is identical to, and in
	addition to, the standard timestamped log generated by this script.  The
	intent of this practice is to make it easier to find the log for the
	last checkpoint loaded on any given server machine. This convention is only
	useful if used consistently.

	Several examples below illustrate the instance option, '-i' option to
	specify the SDP instance. This is optional and can safely be omitted in an
	environment where the standard SDP shell environment is sourced on login,
	and where there is only a single instance on the server machine.

EXAMPLES:
	EXAMPLE 1: Non-interactive Usage

	Non-interactive usage (bash syntax) to load a checkpoint:

	nohup $P4CBIN/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	Then, monitor with:
	tail -f \$(ls -t \$LOGS/load_checkpoint.*.log|head -1)\\n

	EXAMPLE 2: Checkpoint Load then Verify, for the SDP Instance alpha.

	Non-interactive usage (bash syntax) to load a checkpoint followed by a full
	verify of recent archives files only with other options passed to verify.sh:

	nohup $P4CBIN/load_checkpoint.sh /p4/alpha/checkpoints/p4_alpha.ckp.95442.gz -i alpha -verify "-recent -nu -ns" -y < /dev/null > /p4/alpha/logs/load.log 2>&1 &

	EXAMPLE 3: Load Checkpoint and Journals

	Non-interactive usage (bash syntax) to loading a checkpoint and subsequent journals:

	nohup $P4CBIN/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz /p4/1/checkpoints/p4_1.jnl.4025 /p4/1/checkpoints/p4_1.jnl.4026 -i 1 -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	Then, monitor with:
	tail -f \$(ls -t \$LOGS/load_checkpoint.*.log|head -1)\\n

	EXAMPLE 4: Interactive usage.

	Interactive usage to load a checkpoint with no license file.

	$P4CBIN/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -l

	With interactive usage, logging still occurs; all output to the screen is
	captured.

	Note that non-interactive usage with nohup is recommended for checkpoints
	with a long replay duration, to make operation more reliable in event of a
	shell session disconnect.  Alternately, running interactively in a 'screen'
	session (if 'screen' is available) provides similar protection against
	shell session disconnects.

	EXAMPLE 5: Seed New Edge

	Seeding a new edge server.

	nohup $P4CBIN/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -s p4d_edge_syd < /dev/null > /p4/1/logs/load.log 2>&1 &

	WARNING: While this script is useful for seeding a new edge server, this
	script is NOT to be used for recovering or reseeding an existing edge server,
	because all edge-local database tables (mostly workspace data) would be lost.
	To recover an existing edge server, see the recover_edge.sh script.

	EXAMPLE 6: Seed New Edge and Verify

	Seeding a new edge server and then do a verify with default options.

	nohup $P4CBIN/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -s p4d_edge_syd -verify default < /dev/null > /p4/1/logs/load.log 2>&1 &

	EXAMPLE 7: Load a Parallel Checkpoint on an Edge and Verify Recent

	This non-interactive example loads a parallel checkpoint directory.  The
	usage difference is that the checkpoint path provided is a parallel
	checkpoint directory rather than a single checkpoint file.  This example
	loads the checkpoint for a new edge server, and verifes only the most
	recent 3 changes in each depot.  The delay before calling p4verify.sh,
	10 minutes (600) by default, is shortened to 5 seconds in this example.

	nohup $P4CBIN/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025 -i 1 -s p4d_edge_syd -verify \"-o MISSING -recent=3 -ns -L /p4/1/logs/p4verify.fast_and_recent.log\" -delay 5 -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	EXAMPLE 8: Multi Pass Replay of Checkpoints and Journals

	In this example, we want to use a multi-pass procedure involving replay of
	a checkpoint at one point in time, and then later replay subsequent numbered
	journals later. This method can be useful to reduce downtime required for
	migration procedures involving a checkpoint replay if the checkpoint replay
	takes a while, e.g. a few hours or more.  The gist of the approach is to replay
	the checkpoint a day or so a head of the scheduled maintenance.  Then replay
	subsequent numbered journals each day after. Then in the maintenance
	window, replay just the last numbered journal from the old environment in
	the new environment.

	This approach involves a few options:
	* When the checkpoint is replayed, '-no_start' and '-no_xu'. Either specify
	the path to the checkpoint, or use '-latest'.
	* When the numbered journals are replayed in days leading up to the maintenance
	window, use the '-jo_latest' option to replay only a numbered journal.
	* During the maintenance window, load any final numbered journals, then start the
	service.

	Pass 1, 3 days before maintenance:
	nohup load_checkpoint.sh -latest -no_start -no_xu -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	Pass 2, 2 days before maintenance:
	nohup load_checkpoint.sh -jo_latest -no_start -no_xu -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	Pass 3, 1 day before maintenance:
	nohup load_checkpoint.sh -jo_latest -no_start -no_xu -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	Pass 4, during the maintenance window:
	nohup load_checkpoint.sh -jo_latest -y < /dev/null > /p4/1/logs/load.log 2>&1 &
"
   fi

   exit 2
}

#==============================================================================
# Command Line Processing

declare -i LoadOfflineDB=1
declare -i StartP4BrokerWhenDone=0
declare -i StartP4DWhenDone=1
declare -i Interactive=1
declare -i KeepRootDBs=1
declare -i shiftArgs=0

set +u
while [[ $# -gt 0 ]]; do
   case $1 in
      (-i) SDPInstance="$2"; shiftArgs=1;;
      (-s) SetServerID="$2"; shiftArgs=1;;
      (-t) ReplicaTypeTag="$2"; shiftArgs=1;;
      (-verify) DoVerify=1; VerifyOptions="$2" shiftArgs=1;;
      (-delay) VerifyDelay="$2"; shiftArgs=1;;
      (-c) GenSSLCertsIfNeeded=0;;
      (-k) dbg "Ignoring obsolete -k option.";; # '-k' was replaced by '-R'.
      (-R) KeepRootDBs=0;;
      (-F) SafetyFactor="$2" shiftArgs=1;;
      (-l) StartWithoutLicenseFile=1;;
      (-r) LoadOfflineDB=0;;
      (-b) StartP4BrokerWhenDone=1;;
      (-no_start) StartP4DWhenDone=0;;
      (-jo)
         ReplayJournalsOnly=1
         LoadOfflineDB=0
      ;;
      (-jo_latest)
         GetLatestJournals=1
         ReplayJournalsOnly=1
         LoadOfflineDB=0
      ;;
      (-no_xu) DoSchemaUpgrade=0;;
      (-y) Interactive=0;;
      (-latest) GetLatestCheckpoint=1;;
      (-latest_jnls) GetLatestCheckpoint=1; GetLatestJournals=1;;
      (-h) usage -h;;
      (-man) usage -man;;
      (-V) usage -h;; # Deprecated option.
      (-L) Log="$2"; shiftArgs=1;;
      (-si) SilentMode=1;;
      (-d) Debug=1;;
      (-D) Debug=1; set -x;; # Debug; use bash 'set -x' extreme debugging mode.
      (-*) usage -h "Unknown option ($1).";;

      # For path arguments, we need to figure out what is provided.
      # If '-jo_latest' is specified, no path arguments are allowed.
      # If neither '-latest' nor '-latest_jnls' is provided:
      #   If there is one path argument: It should be a checkpoint file or
      #   directory.
      #   If there are mulitple path args: First is a checkpoint, the rest are journals
      #   (which may or may not end with the P4JOURNAL).
      # If '-latest' is specified, any path args are journals, which may or may not end
      #   with the P4JOURNAL file.
      # If '-latest_jnls' is specified, there should be no path args, or exactly one, and
      #   if a path is provided, it must be the P4JOURNAL.
      (*)
         [[ "$ReplayJournalsOnly" -eq 1 && "$GetLatestJournals" -eq 1 ]] && \
            usage -h "A path argument was provided ($1), but no path args are expected when '-jo_latest' is used."

         #  Unless '-latest' was specified, the first path argument is the user-specified checkpoint.
         if [[ "$GetLatestCheckpoint" -eq 0 && -z "$Checkpoint" && "$ReplayJournalsOnly" -eq 0 ]]; then
            Checkpoint="$1"
         # Unless '-latest_jnls' is specified, additional path arguments are user-specified journals.
         elif [[ "$GetLatestJournals" -eq 0 ]]; then
            Journals[JournalCount]="$1"
            JournalCount+=1
         fi
      ;;
   esac

   # Shift (modify $#) the appropriate number of times.
   shift; while [[ $shiftArgs -gt 0 ]]; do
      [[ $# -eq 0 ]] && usage -h "Incorrect number of arguments."
      shiftArgs=$shiftArgs-1
      shift
   done
done
set -u

#==============================================================================
# Command Line Verification

[[ -n "$Log" ]] || \
   Log="${LOGS:-/tmp}/${ThisScript%.sh}.$(date +'%Y%m%d-%H%M%S').log"

if [[ -z "$SDPInstance" ]]; then
   if [[ "${SDP_INSTANCE:-Unset}" != Unset ]]; then
      SDPInstance="$SDP_INSTANCE"
   else
      usage -h "SDP Instance parameter is missing and SDP_INSTANCE is undefined." 
   fi
fi

if [[ -n "$ReplicaTypeTag" && -z "$SetServerID" ]]; then
   usage -h "The '-t' was used without '-s'.  If '-t <Type>' is specified, the '-s <ServerID>' argument is required."
fi

if [[ -n "$VerifyDelay" && "$DoVerify" -eq 0 ]]; then
   usage -h "The '-d <delay>' requires '-verify' to also be used. See info for the '-verify' option."
fi

if [[ "$StartP4DWhenDone" -eq 0 && "$DoVerify" -eq 1 ]]; then
   usage -h "The '-verify' and '-no_start' options are mutually exclusive."
fi

if [[ -n "$VerifyOptions" && "$VerifyOptions" == default ]]; then
   VerifyOptions="$DefaultVerifyOptions"
fi

[[ -n "$VerifyDelay" ]] || VerifyDelay="$DefaultVerifyDelay"

[[ "$ReplayJournalsOnly" -eq 1 && "$GetLatestJournals" -eq 0 && "$JournalCount" -eq 0 ]] && \
   usage -h "The '-jo' option was specified, but no journals were provided. Provide paths to journals, or consider using '-jo_latest'."

#==============================================================================
# Main Program

trap terminate EXIT SIGINT SIGTERM

# Initialize logging.
touch "$Log" || bail "Couldn't touch log file [$Log]."

# Redirect stdout and stderr to a log file.
if [[ "$SilentMode" -eq 0 ]]; then
   exec > >(tee "$Log")
   exec 2>&1
else
   exec >"$Log"
   exec 2>&1
fi

msg "${H1}\\nLog is: $Log"

ThisUser=$(id -n -u)
msg "Started $ThisScript v$Version as $ThisUser@$ThisHost on $(date) as:\\n$CmdLine\\n"

# shellcheck disable=SC2153
SDPInstanceVarsFile="/p4/common/config/p4_${SDPInstance}.vars"

[[ -r "$SDPInstanceVarsFile" ]] ||\
   bail "Missing SDP instance vars file. Typo in instance name? Expected file: $SDPInstanceVarsFile"

# shellcheck disable=SC1091
source /p4/common/bin/p4_vars "$SDPInstance"
# shellcheck disable=SC1091
source /p4/common/bin/ps_functions.sh ||\
   bail "Failed to load ps_functions.sh."
#shellcheck disable=SC1091
source /p4/common/bin/edge_vars ||\
   bail "Failed to load edge_vars."

[[ "$ReplayJournalsOnly" -eq 0 && "$GetLatestCheckpoint" -eq 0 && -z "$Checkpoint" ]] && \
   usage -h "No checkpoint specified. A checkpoint must be specified unless '-latest', '-jo', or '-jo_latest' is used."

#------------------------------------------------------------------------------
msg "${H2}\\nPhase 1 - Preflight Checks."

if [[ "$ReplayJournalsOnly" -eq 0 ]]; then
   if [[ -r "$Checkpoint" ]]; then
      if [[ -f "$Checkpoint" ]]; then
         msg "Checkpoint is a file [$Checkpoint] - Checkpoint Replay will be serial."
      elif [[ -d "$Checkpoint" ]]; then
         msg "Checkpoint is a directory [$Checkpoint] - Checkpoint Replay will be parallel."
         ParallelCheckpointDir="$Checkpoint"
         DoParallelCheckpoints=1

         # For this load_checkpoint.sh script, we don't rely on configuration to indicate
         # whether to use a serial or parallel checkpoint -- we simply the latest checkpoint
         # available or the the one specified by the user. However, if parallel checkpoints
         # are configured, we use that to determine the dessired number of threads to use,
         # defaulting to 4 if we can't find a configuration to the contrary.
         if [[ "$DO_PARALLEL_CHECKPOINTS" =~ ^[0-9]+$ ]]; then
            if [[ "$DO_PARALLEL_CHECKPOINTS" == 1 ]]; then
               Threads=4
            else
               # Strip leading zeros from the DO_PARALLEL_CHECKPOINTS value
               # (if the 'bc' utility is available).
               if [[ -n "$(command -v bc)" ]]; then
                  Threads=$(echo "$DO_PARALLEL_CHECKPOINTS"|bc)
               else
                  Threads="$DO_PARALLEL_CHECKPOINTS"
               fi
            fi
         else
            Threads=4
         fi
      else
         bail "Unknown file type for checkpoint [$Checkpoint]. It is neither a file nor directory or symlink to a file or directory."
      fi
   # Bail unless the user specified '-latest', in which case no checkpoint
   # is provided.
   elif [[ "$GetLatestCheckpoint" -eq 0 ]]; then
      bail "Specified checkpoint does not exist: $Checkpoint"
   fi
fi

if [[ "$ReplayJournalsOnly" -eq 0 ]]; then
   [[ -z "$Checkpoint" && "$GetLatestCheckpoint" -eq 0 ]] &&\
      usage -h "Missing parameter.  Specify a checkpoint file/directory, or use '-latest' or '-latest_jnls'."
fi

# Set or check ServerID value.
if [[ -n "$SetServerID" ]]; then
   if [[ -f "$P4ROOT/server.id" ]]; then
      if grep -q "$SetServerID" "$P4ROOT/server.id"; then
         msg "Verified: $P4ROOT/server.id value matches set value: $SetServerID"
      else
         bail "Existing $P4ROOT/server.id file is not set to $SetServerID, but to $(cat "$P4ROOT"/server.id). If you are certain you want to use the ServerID of $SetServerID specified with '-s', remove the existing $P4ROOT/server.id file, e.g. with:\\n\\trm -f $P4ROOT/server.id\\n\\nAnd then try again. Aborting for now."
      fi
   else
      msg "Setting ServerID $SetServerID in $P4ROOT/server.id"
      echo "$SetServerID" > "$P4ROOT/server.id" ||\
         bail "Failed to write $P4ROOT/server.id. Aborting"
   fi

   if [[ "$SetServerID" == "p4d_"* ]]; then
      InferredReplicaTypeTag=$(infer_replica_type_tag "$SetServerID")
      msg "Inferred '-t $InferredReplicaTypeTag' from '-s $SetServerID'."

      if [[ -z "$ReplicaTypeTag" ]]; then
         ReplicaTypeTag="$InferredReplicaTypeTag"
      elif [[ "$ReplicaTypeTag" == "$InferredReplicaTypeTag" ]]; then
         msg "Verified: Value specified with '-t $InferredReplicaTypeTag' matches value inferred from '-s $SetServerID'."
      else
         usage -h "The replica type '-t $ReplicaTypeTag' was specified but does not match the value '$InferredReplicaTypeTag' inferred from '-s $SetServerID'."
      fi
   fi
else
   if [[ -z "$ReplicaTypeTag" ]]; then
      # shellcheck disable=SC2153
      ReplicaTypeTag=$(infer_replica_type_tag "$SERVERID")

      if [[ -n "$ReplicaTypeTag" ]]; then
         msg "Inferred '-t $ReplicaTypeTag' from ServerID [$SERVERID]."
      else
         warnmsg "Unable to infer a replica type from ServerID [$SERVERID]."
      fi
   fi
fi

# The replica type may have been set with '-t <Type>' or inferred from
# '-s <ServerID>'. In either case, disable the license check if it's
# not needed.
if [[ -n "$ReplicaTypeTag" ]]; then
   # If a replica, the license file is not required by default unless
   # the type tag indicates it is a type used for High Availability,
   # which should have a license file to support 'p4 failover'.
   case "$ReplicaTypeTag" in
      (ha|ham) true;;
      (fs|fsm) true;;
      (*) LicenseFileNeeded=0;;
   esac
fi

# shellcheck disable=SC2153
if [[ "$P4MASTER_ID" == "$SERVERID" ]]; then
   CheckpointsDir="$CHECKPOINTS"
   dbg "On commit server, CheckpointsDir=$CHECKPOINTS"
else
   # Figure out if we should be using the Second Form of the journalPrefix per the
   # standard, and set CheckpointsDir accordingly.
   if [[ "$ReplicaTypeTag" =~ (edge|ffr) ]]; then
      CheckpointsDir="/p4/${SDP_INSTANCE}/checkpoints.${SERVERID#p4d_}"
      JournalPrefix="${CheckpointsDir}/${P4SERVER}.${SERVERID#p4d_}"
      dbg "CheckpointsDir=$CHECKPOINTS (on edge or ffr)."
      dbg "JournalPrefix=$JournalPrefix"
   else
      CheckpointsDir="$CHECKPOINTS"
      JournalPrefix="$CHECKPOINTS/$P4SERVER"
      dbg "CheckpointsDir=$CHECKPOINTS"
      dbg "JournalPrefix=$JournalPrefix"
   fi
fi

# If the user requested to find the latest checkpoint, see if we can find one.  Find the latest *.md5
# file, and then determine if there is an associated checkpoint file or directory.  Pick whatever is
# associated with the latest *.md5 file.
# file or parallel checkpoint directory.
if [[ "$GetLatestCheckpoint" -eq 1 ]]; then
   # shellcheck disable=SC2012
   CheckpointMD5=$(ls -t "$CheckpointsDir"/*.md5 2>/dev/null | head -1)
   if [[ -n "$CheckpointMD5" ]]; then
      if [[ -d "${CheckpointMD5%.md5}" && -r "${CheckpointMD5%.md5}.OK" ]]; then
         ParallelCheckpointDir="${CheckpointMD5%.md5}"
         DoParallelCheckpoints=1
         Checkpoint="$ParallelCheckpointDir"
         msg "With '-latest', selected parallel checkpoint dir: $ParallelCheckpointDir"
      elif [[ -r "${CheckpointMD5%.md5}" ]]; then
         Checkpoint="${CheckpointMD5%.md5}"
         msg "With '-latest', selected parallel checkpoint file: $Checkpoint"
      elif [[ -r "${CheckpointMD5/.md5/.gz}" ]]; then
         Checkpoint="${CheckpointMD5/.md5/.gz}"
         msg "With '-latest', selected parallel checkpoint file: $Checkpoint"
      else
         bail "The '-latest' option was used, but only an MD5 file was found ($CheckpointMD5) -- no corresponding checkpoint file or directory was not found: ${CheckpointMD5%.md5} (file or directory) or ${CheckpointMD5/.md5/.gz} (file) expected. If a directory, the file ${CheckpointMD5%.md5}.OK is also expected."
      fi
   else
      bail "The '-latest' or '-latest_jnls' option was used, but no *.md5 file is available in $CheckpointsDir."
   fi
fi

# If the user requested to find the latest journals, see if we can find any.
if [[ "$GetLatestJournals" -eq 1 ]]; then
   # We need to determine the journal counter.  If we are about to load a checkpoint,
   # get the journal counter from the data set we're about to load. If the checkpoint
   # was loaded in an earlier pass, extract the journal counter from the data set.
   if [[ "$ReplayJournalsOnly" -eq 1 ]]; then
      # Extract JournalCounter from existing data set in P4ROOT.
      if [[ -r "$P4ROOT/db.counters" ]]; then
         JournalCounter=$("$P4DBIN" -r "$P4ROOT" -k db.counters -jd - 2>/dev/null | grep '@journal@' | cut -d@ -f8)
         if [[ ! "$JournalCounter" =~ ^[0-9]+$ ]]; then
            bail "Journal Counter extracted from $P4ROOT/db.counters is invalid: $JournalCounter"
         fi
      else
         bail "Could not determine journal counter; missing file $P4ROOT/db.counters."
      fi
   else
      if [[ "$DoParallelCheckpoints" -eq 1 ]]; then
         # Extract JournalCounter from the parallel checkpoint directory we are about to load.
         if [[ -r "$ParallelCheckpointDir/db.counters.ckp.gz" ]]; then
            JournalCounter=$(zgrep @journal@ "$ParallelCheckpointDir/db.counters.ckp.gz" | cut -d@ -f8)
         elif [[ -r "$ParallelCheckpointDir/db.counters.ckp" ]]; then
            JournalCounter=$(grep @journal@ "$ParallelCheckpointDir/db.counters.ckp" | cut -d@ -f8)
         else
            bail "Could not determine journal counter from db files in parallel checkpoint dir: [$ParallelCheckpointDir]."
         fi
      else
         # Extract JournalCounter from the checkpoint file we are about to load.
         JournalCounter=${Checkpoint##*/.ckp.}
         JournalCounter=${JournalCounter%.gz}
         if [[ ! "$JournalCounter" =~ ^[0-9]+$ ]]; then
            bail "Journal Counter extracted from checkpoint file name [$Checkpoint] is invalid: $JournalCounter"
         fi
      fi
   fi
   msg "Searching for journals $CheckpointsDir/$P4SERVER.jnl.* with JournalCounter >= $JournalCounter."
   JournalCount=0

   # Find numbered journals, which may or may not be compressed.
   while true; do
      if [[ -r "${CheckpointsDir}/${P4SERVER}.jnl.${JournalCounter}" ]]; then
         Journals[JournalCount]="${CheckpointsDir}/${P4SERVER}.jnl.${JournalCounter}"
         JournalCount=$((JournalCount+1))
         JournalCounter=$((JournalCounter+1))
      elif [[ -r "${CheckpointsDir}/${P4SERVER}.jnl.${JournalCounter}.gz" ]]; then
         Journals[JournalCount]="${CheckpointsDir}/${P4SERVER}.jnl.${JournalCounter}"
         JournalCount=$((JournalCount+1))
         JournalCounter=$((JournalCounter+1))
      else
         break
      fi
   done

   if [[ "$JournalCount" -ne 0 ]]; then
      msg "Found $JournalCount numbered journals to replay."
   else
      # If '-latest_jnls' was specfied, and we found no journals, that's OK.
      # If '-jo_latest' was specified and we found no journals, that's an error.
      if [[ "$ReplayJournalsOnly" -eq 1 ]]; then
         bail "The '-jo_latest' option was specified, but no numbered were found to relay. Aborting."
      else
         msg "Found no numbered journals to replay."
      fi
   fi
fi

# Preflight - check that specified journals exist. Also, determine if the live
# P4JOURNAL file is on the list of journal to be replied.
if [[ "$JournalCount" -gt 0 ]]; then
   if [[ -r "$P4JOURNAL" ]]; then
      # shellcheck disable=SC2012
      INode1="$(ls -i "$P4JOURNAL" 2>/dev/null|awk '{print $1}')"
   fi

   for jnl in "${Journals[@]}"; do
      if [[ -r  "$jnl" ]]; then
         if [[ -n "$INode1" ]]; then
            # shellcheck disable=SC2012
            INode2="$(ls -i "$jnl" 2>/dev/null|awk '{print $1}')"
            [[ "$INode1" == "$INode2" ]] && LoadLiveJournal=1
         fi
      else
         bail "Specified journal file does not exist: $jnl"
      fi
   done

   # Extra sanity check: If the live $P4JOURNAL is specified, it
   # must be the last one in the last. Give an error if it's
   # not the last path argument in the list.
   if [[ "$LoadLiveJournal" -eq 1 ]]; then
      j=${#Journals[@]}
      if [[ "$j" -ne 1 ]]; then
         j=$((j-1))
         for ((i=0; i<j; i++)); do
            jnl=${Journals[$i]}
            # shellcheck disable=SC2012
            INode2="$(ls -i "$jnl" 2>/dev/null|awk '{print $1}')"
            if [[ "$INode1" == "$INode2" ]]; then
               bail "The live P4JOURNAL appears in a list of path arguments. If a list of journals are provided including the live P4JOURNAL, that live journal must appear as the last file in the list. The order or journals does matter, and the live journal must always be the last replayed."
            fi
         done
      fi
   fi
fi

# shellcheck disable=SC2153
P4DInitScript="$P4HOME/bin/p4d_${SDP_INSTANCE}_init"
P4BrokerInitScript="$P4HOME/bin/p4broker_${SDP_INSTANCE}_init"

cd "$P4ROOT" || bail "Could not cd to P4ROOT [$P4ROOT]."

[[ "$PWD" == "/p4/${SDPInstance}/root" ]] || bail "Unexpected P4ROOT value of: $P4ROOT"

if [[ "$ReplayJournalsOnly" -eq 0 ]]; then
   CheckpointMD5="${Checkpoint}.md5"
   if [[ -r "$CheckpointMD5" ]]; then
      msg "Verified: MD5 file for checkpoint exists: $CheckpointMD5"
   else
      CheckpointMD5="${Checkpoint/.gz/.md5}"
      if [[ -r "$CheckpointMD5" ]]; then
         msg "Verified: MD5 file for checkpoint exists: $CheckpointMD5"
      else
         bail "Could not find MD5 file for checkpoint. Tried ${Checkpoint}.md5 and ${Checkpoint/.gz/.md5}"
      fi
   fi

   if [[ "$LicenseFileNeeded" -eq 1 ]]; then
      msg "Checking for license file."
      if [[ ! -r "$P4ROOT/license" ]]; then
         if [[ "$StartWithoutLicenseFile" -eq 1 ]]; then
            warnmsg "No $P4ROOT/license file found. Continuing due to '-l'."
         else
            bail "No $P4ROOT/license file found. If none needed, specify '-l' and try again."
         fi
      fi
   fi
fi

msg "Preflight Summary:"

if [[ "$ReplayJournalsOnly" -eq 0 ]]; then
   echo -n "   Checkpoint to replay is: $Checkpoint "

   if [[ "$DoParallelCheckpoints" -eq 1 ]]; then
      echo "(Parallel Checkpoint Replay, $Threads threads)"
   else
      echo "(Seriel Checkpoint Replay)"
   fi
fi

if [[ "$JournalCount" -gt 0 ]]; then
   for jnl in "${Journals[@]}"; do
      msg "   Journal to replay: $jnl"
   done
fi

echo -n "   Upgrade Schema: "
if [[ "$DoSchemaUpgrade" -eq 1 ]]; then echo YES; else echo NO; fi
echo -n "   Start P4D When Done: "
if [[ "$StartP4DWhenDone" -eq 1 ]]; then echo YES; else echo NO; fi
echo -n "   Start Broker When Done: "
if [[ "$StartP4BrokerWhenDone" -eq 1 ]]; then echo YES; else echo NO; fi
echo -n "   License Needed: "
if [[ "$LicenseFileNeeded" -eq 1 ]]; then echo YES; else echo NO; fi

user_confirmation_and_warning "$Interactive" ||\
   bail "User confirmation not verified. Aborting."

#------------------------------------------------------------------------------
msg "${H2}\\nPhase 2 - Prepare to Load Checkpoint."

if [[ "$ReplayJournalsOnly" -eq 0 ]]; then
   if [[ "$P4PORT" =~ ^ssl[46]*: && ! -r "$P4SSLDIR/certificate.txt" ]]; then
      if [[ "$GenSSLCertsIfNeeded" -eq 1 ]]; then
         if [[ ! -d "$P4SSLDIR" ]]; then
            mkdir -p "$P4SSLDIR" ||\
               bail "Failed to create P4SSLDIR [$P4SSLDIR]."
         fi

         chmod 700 "$P4SSLDIR" ||\
            bail "Failed to do 'chmod 700 $P4SSLDIR'."

         "$P4DBIN" -Gc ||\
            bail "There was a problem generating SSL certificates with '$P4DBIN -Gc'."
      else
         bail "The P4PORT has SSL is enabled, but there is no certificate file\\n[$P4SSLDIR/certificate.txt], and the '-c' flag as specified requiring SSL certificates to be in place.\\n"
      fi
   fi
fi

[[ -x "$P4DInitScript" ]] ||\
   bail "Aborting: P4D Init script is missing or not executable: $P4DInitScript"

msg "Checking to see if broker is configured."
if [[ -r "/p4/common/config/p4_${SDPInstance}.broker.${ThisHost}.cfg" ]]; then
   P4BrokerCfg="/p4/common/config/p4_${SDPInstance}.broker.${ThisHost}.cfg"
   msg "Broker configured with: $P4BrokerCfg"
elif [[ -r "/p4/common/config/p4_${SDPInstance}.broker.cfg" ]]; then
   P4BrokerCfg="/p4/common/config/p4_${SDPInstance}.broker.cfg"
   msg "Broker configured with: $P4BrokerCfg"
else
   msg "No broker config detected."
fi

P4BrokerServiceName="${P4BROKERBIN##*/}"
if [[ -x "$P4BrokerInitScript" && -r "$P4BrokerCfg" ]]; then
   if [[ -n "$(command -v systemctl)" ]]; then
      if [[ -n "$(systemctl is-enabled "$P4BrokerServiceName" 2>/dev/null)" ]]; then
         UseSystemdForP4Broker=1
      fi
   fi

   msg "Checking p4broker status."
   if "$P4BrokerInitScript" status > /dev/null 2>&1; then
      msg "Shutting down p4broker."
      if [[ "$UseSystemdForP4Broker" -eq 1 ]]; then
         sudo systemctl stop "$P4BrokerServiceName" ||\
            bail "Failed to execute: sudo systemctl stop $P4BrokerServiceName"
      else
         "$P4BrokerInitScript" stop
      fi
   else
      msg "Verified: $P4BrokerServiceName is down."
   fi
fi

P4DServiceName="${P4DBIN##*/}"
if [[ -n "$(command -v systemctl)" ]]; then
   if [[ -n "$(systemctl is-enabled "$P4DServiceName" 2>/dev/null)" ]]; then
      UseSystemdForP4D=1
   fi
fi

msg "Checking p4d status."
if "$P4DInitScript" status > /dev/null 2>&1; then
   MaxStopDelay=${SDP_MAX_STOP_DELAY_P4D:-43200}
   msg "\\nShutting down p4d."
   if [[ "$UseSystemdForP4D" -eq 1 ]]; then
      sudo systemctl stop "$P4DServiceName" ||\
         bail "Failed to execute: sudo systemctl stop $P4DServiceName"

      # With systemd, we must independently confirm service stop,
      # waiting if needed.
      StopVerified=0
      i=0; while [[ "$i" -lt "$MaxStopDelay" ]]; do
         if "$P4DInitScript" status > /dev/null 2>&1; then
            sleep 1
         else
            StopVerified=1
            break
         fi
         i=$((i+1))
      done

      if [[ "$StopVerified" -eq 1 ]]; then
         msg "Verified: p4d has shutdown."
      else
         errmsg "Server $P4DServiceName did not stop after $MaxStopDelay seconds. Tailing $P4LOG:"
            tail "$P4LOG" 
         bail "Aborting due to failed p4d stop."
      fi
   else
         "$P4DInitScript" stop
   fi
else
   msg "Verified: $P4DServiceName is down."
fi

#------------------------------------------------------------------------------
if [[ "$ReplayJournalsOnly" -eq 0 ]]; then
   msg "${H2}\\nPhase 3 - Cleanup dbs, logs, journals, state* files, etc."

   echo "P4ROOT is not available during load_checkpoint.sh processing." > "$P4ROOT/P4ROOT_not_usable.txt"

   # Move Aside or Remove db.* files, but not server.id or license files.
   Datestamp=$(date +'%Y-%m-%d-%H%M%S')
   if [[ "$KeepRootDBs" -eq 1 ]]; then
      # Try to avoid an out-of-diskspace issue.
      if [[ "$SafetyFactor" != "0" && -n "$(command -v bc)" ]]; then
         if [[ -n "$(ls -t db.* rdb.* 2>/dev/null)" ]]; then
            DBSizes=$(du -bc db.* rdb.lbr* 2>/dev/null | grep total | cut -f1)
            dbg "DBSizes1=[$DBSizes] (in bytes)."
            DBSizes=$(echo "$DBSizes*$SafetyFactor/1024"|bc 2>/dev/null)
            dbg "DBSizes2=[$DBSizes] (in K, with Safety factor of $SafetyFactor)."
            DiskSpaceAvail=$(df -k . 2>/dev/null | grep / | awk '{print $4}')
            dbg "DiskSpaceAvail=[$DiskSpaceAvail]."

            if [[ "$DBSizes" =~ ^[0-9.]+$ && "$DiskSpaceAvail" =~ ^[0-9]+$ ]]; then
               if [[ "$(echo "$DBSizes >= $DiskSpaceAvail" | bc -l)" == "1" ]]; then
                  if [[ -n "$(command -v numfmt)" ]]; then
                     bail "There may be insufficient disk space to replay a checkpoint; $(echo "$DBSizes" | numfmt --to=iec --from-unit=1024) is the estimated need, and $(echo "$DiskSpaceAvail" | numfmt --to=iec --from-unit=1024) is available.  Consider using the '-R' or '-F' options, or find a way to increase available disk space."
                  else
                     bail "There may be insufficient disk space to replay a checkpoint; ${DBSizes}K is the estimated need, and ${DiskSpaceAvail}K is available.  Consider using the '-R' or '-F' options, or find a way to increase available disk space."
                  fi
               else
                  dbg "Verified: Sufficient disk space is estimated to be available."
               fi
            else
               warnmsg "Skipping disk space check; could not get sizes using: du -bc db.* rdb.*"
            fi
         else
            msg "Skipping disk space check; no DBs found."
         fi
      else
         dbg "Skipping disk space check; Safety Factor set to 0 or bc not available."
      fi

      MovedDBDir="MovedDBs.$Datestamp"
      mkdir "$MovedDBDir" || bail "In $PWD could not do: mkdir \"$MovedDBDir\""

      msg "Moving aside various db and other files in $PWD:"
      find "$PWD"/ -maxdepth 1 -type f -name "db.*" -print -exec mv -f {} "$MovedDBDir/" \;
      find "$PWD"/ -maxdepth 1 -type f -name "rdb.*" -print -exec mv -f {} "$MovedDBDir/" \;
      find "$PWD"/ -maxdepth 1 -type f -name "state*" -print -exec mv -f {} "$MovedDBDir/" \;
      find "$PWD"/ -maxdepth 1 -type f -name "server.pid" -print -exec mv -f {} "$MovedDBDir/" \;
   else
      if [[ -n "$(ls -t db.* rdb.* 2>/dev/null)" ]]; then
         Cmd='/bin/rm -f db.* rdb.*'
         msg "Cleaning up databases with this command in $PWD:\\n$Cmd"
         eval "$Cmd" || bail "Failed to clean up old databases in $P4ROOT"
      else
         msg "Skipping cleanup of DBs; none found."
      fi

      # Remove state* files.
      if [[ -n "$(ls -t state* server.pid 2>/dev/null)" ]]; then
         Cmd='/bin/rm -f state* server.pid'
         msg "Cleaning up state* and server.pid files with this command in $PWD:\\n$Cmd"
         eval "$Cmd" || bail "Failed to clean up old state files in $P4ROOT"
      else
         msg "Skipping cleanup of state* and server.pid files; none found."
      fi
   fi

   if [[ -d server.locks ]]; then
      Cmd="/bin/rm -rf server.locks"
      msg "Cleaning up server.locks directory with this command in $PWD:\\n$Cmd"
      eval "$Cmd" || bail "Failed to clean up old server.locks directory in $P4ROOT"
   else
      dbg "Skipping cleanup of state* and server.pid files; none found."
   fi

   msg "Directory listing in $PWD after cleanup:\\n$(ls -lrt)\\n"

   # Move P4LOG aside if it exists.
   if [[ -r "$P4LOG" ]]; then
      Cmd="mv $P4LOG $P4LOG.moved.$(date +'%Y%m%d-%H%M')"
      msg "Moving P4LOG aside with this command:\\n$Cmd"
      eval "$Cmd" || bail "Failed to move P4LOG aside."
   fi

   # Move P4JOURNAL aside if it exists, unless the live P4JOURNAL was on
   # the list of journal to replay.
   if [[ "$LoadLiveJournal" -eq 0 && -r "$P4JOURNAL" ]]; then
      Cmd="mv $P4JOURNAL $P4JOURNAL.moved.$(date +'%Y%m%d-%H%M')"
      msg "Moving P4JOURNAL aside with this command:\\n$Cmd"
      eval "$Cmd" || bail "Failed to move P4JOURNAL aside."
   fi

   # Move journal.NNN files (for standby replicas) aside if they exist.
   cd "$LOGS" || bail "Could not cd to: $LOGS"

   # shellcheck disable=SC2045
   for f in $(ls journal.* 2>/dev/null); do
      [[ "$f" =~ ^journal.[0-9]+$ ]] || continue
      Cmd="mv $f $f.moved.$Datestamp"
      msg "Moving file $f aside with this command:\\n$Cmd"
      eval "$Cmd" || bail "Failed to move file $f aside."
   done
   cd - > /dev/null || bail "Could not cd to: $OLDPWD"

   # For checkpoint replay operations, determine whether case sensitivity
   # flag is needed, and whether '-z' is needed.
   if [[ "$Checkpoint" == *".gz" ]]; then
      if [[ "$(uname -s)" == "Darwin" ]]; then
         CaseMode=$(zcat < "$Checkpoint" | head -1 | grep -E '^@nx@ (0|2) ' | cut -d ' ' -f5)
      else
         CaseMode=$(zcat "$Checkpoint" | head -1 | grep -E '^@nx@ (0|2) ' | cut -d ' ' -f5)
      fi

      if [[ "$CaseMode" == "2" ]]; then
         CaseFlag='-C1'
         msg "Case-insensitive checkpoint detected."
      else
         msg "Case-sensitive checkpoint detected."
      fi

      # In P4D 2018.1, the '-z' flag should be dropped, as the need for
      # compression/decompression is determined by P4D when replying,
      # and thus '-z' should not be used (though it is supported by P4D
      # for backward compatibility, and we use it here if using an older
      # server.
      # shellcheck disable=SC2072
      [[ "$P4D_VERSION" < "2018.1" ]] && CompressFlag='-z'
   else
      if [[ -d "$Checkpoint" ]]; then
         CaseMode=$(head -1 "$Checkpoint"| grep -E '^@nx@ (0|2) ' | cut -d ' ' -f5)
         if [[ "$CaseMode" == "2" ]]; then
            CaseFlag='-C1'
            msg "Case-insensitive checkpoint detected."
         else
            msg "Case-sensitive checkpoint detected."
         fi
      else
         dbg "Case sensitifty for parallel checkpoint directory unknown."
      fi
   fi
else
   msg "Skipping Phase 3; replaying journals only."
fi

#------------------------------------------------------------------------------
msg "${H2}\\nPhase 4 - Load Checkpoint in P4ROOT."

if [[ "$ReplayJournalsOnly" -eq 0 ]]; then
   Cmd="$P4DBIN -r $P4ROOT $CompressFlag $CaseFlag"

   # For edge servers, ignore tables specified by $ExcludedTables, defined in
   # /p4/common/bin/edge_vars.
   if [[ "$ReplicaTypeTag" == "edge" ]]; then
      # shellcheck disable=SC2154
      Cmd+=" -K $ExcludedTables"
   fi

   if [[ "$DoParallelCheckpoints" -eq 1 ]]; then
      Cmd+=" -N $Threads -jrp $ParallelCheckpointDir"
   else
      Cmd+=" -jr $Checkpoint"
   fi

   msg "Replaying checkpoint to P4ROOT with this command:\\n$Cmd"
   eval "$Cmd" || bail "Checkpoint replay to P4ROOT failed."
fi

if [[ "$JournalCount" -gt 0 ]]; then
   for jnl in "${Journals[@]}"; do
      Cmd="$P4DBIN -r $P4ROOT -f"
      if [[ "$ReplicaTypeTag" == "edge" ]]; then
         # shellcheck disable=SC2154
         Cmd+=" -K $ExcludedTables"
      fi
      Cmd+=" -jr $jnl"
      msg "Replaying journal to P4ROOT with this command:\\n$Cmd"
      eval "$Cmd" || bail "Replay of journal to P4ROOT failed for journal: $jnl"
   done
fi

rm -f "$P4ROOT/P4ROOT_not_usable.txt"

#------------------------------------------------------------------------------
msg "${H2}\\nPhase 5 - Upgrade Schema."

if [[ "$DoSchemaUpgrade" -eq 1 ]]; then
   Cmd="$P4DBIN -r $P4ROOT -t localhost:0.0.0.0 -xu"
   msg "Ensuring databases are upgraded with this command:\\n$Cmd"
   eval "$Cmd" || bail "Database upgrade in P4ROOT failed."
else
   msg "Skipping P4ROOT database schema upgrade ('p4d -xu') due to '-no_xu'."
fi

#------------------------------------------------------------------------------
msg "${H2}\\nPhase 6 - Start Services."
if [[ "$StartP4DWhenDone" -eq 1 ]]; then
   msg "Starting p4d."
   if [[ "$UseSystemdForP4D" -eq 1 ]]; then
      sudo systemctl start "$P4DServiceName" ||\
         bail "Failed to execute: sudo systemctl start $P4DServiceName."
   else
      "$P4DInitScript" start
   fi

   # Delay a bit to give p4d time to start. As it comes up,
   # ensure the local SSL connection is trusted.
   i=0; while [[ "$i" -lt 10 ]]; do
      sleep 2
      if p4 info -s > /dev/null 2>&1; then
         break
      elif [[ "$P4PORT" =~ ^ssl[46]*: ]]; then
         p4 trust -f -y > /dev/null 2>&1
      fi
      i=$((i+1))
   done

   if p4 info -s > /dev/null 2>&1; then
      msg "The P4D Server started OK."
   else
      errmsg "The P4D Server did not start. Consider reviewing the P4LOG [$P4LOG] and/or $LOGS/p4d_init.log."
   fi

   msg "Logging in."
   msg "Running: $P4CBIN/p4login -v"
   "$P4CBIN/p4login" -v
   msg "Running: $P4CBIN/p4login -p $P4MASTERPORT -v"
   "$P4CBIN/p4login" -p "$P4MASTERPORT" -v

   # Now that we have loaded a checkpoint, re-load the shell environment to
   # ensure that P4REPLICA is set correctly, as some db.config settings are
   # determined dynamically.

   # shellcheck disable=SC1091
   source /p4/common/bin/p4_vars "$SDPInstance"
   if [[ "$P4REPLICA" == TRUE ]]; then
      msg "Logging in service user."
      msg "Running: $P4CBIN/p4login -v -service"
      "$P4CBIN/p4login" -v -service

      sleep 3
      Cmd="$P4BIN -s pull -lj"
      msg "Checking replication status with this command:\\n$Cmd"
      eval "$Cmd" || bail "Replica is not replicating properly."
   fi

#------------------------------------------------------------------------------
   if [[ "$DoVerify" -eq 1 ]]; then
      msg "${H2}\\nPhase 7A - Optional Post Op - Verify."
      Cmd="p4verify.sh $SDPInstance $VerifyOptions"

      if [[ "$VerifyDelay" -ne 0 ]]; then
         msg "Sleeping $VerifyDelay seconds before starting p4verify.sh ..."
         sleep "$VerifyDelay"
      fi

      msg "\\nPerforming archive verification with this command, launched in as a\\nbackground process (fire and forget):\\nnohup $Cmd < /dev/null > /dev/null 2>&1 &"
      # shellcheck disable=SC2086
      nohup $Cmd < /dev/null > /dev/null 2>&1 &

      sleep 1
      msg "\\nThe p4verify.sh log is: $LOGS/p4verify.log"
   fi
else
   msg "Skipping start of p4d due to '-no_start'."
fi

if [[ -x "$P4BrokerInitScript" && -r "$P4BrokerCfg" ]]; then
   msg "${H2}\\nPhase 7B - Optional Post Op / Start Broker."
   if [[ "$StartP4BrokerWhenDone" -eq 1 ]]; then
      if [[ "$UseSystemdForP4Broker" -eq 1 ]]; then
         sudo systemctl start "$P4BrokerServiceName" ||\
            bail "Failed to execute: sudo systemctl start ${P4BrokerServiceName}."
      else
         "$P4BrokerInitScript" start
      fi

      i=0; while [[ "$i" -lt 10 ]]; do
         sleep 3
         msg "Running (try $((i+1))): $P4CBIN/p4login -p $P4BROKERPORT -v"
         "$P4CBIN/p4login" -p "$P4BROKERPORT" -v && break
         i=$((i+1))
      done
   else
      if [[ "$UseSystemdForP4Broker" -eq 1 ]]; then
         msg "NOT starting broker. Start it manually when ready with:\\n\\tsudo systemctl start $P4BrokerServiceName\\n"
      else
         msg "NOT starting broker. Start it manually when ready with:\\n\\t$P4BrokerInitScript start\\n"
      fi
   fi
fi

msg "Checkpoint load processing took $((SECONDS/3600)) hours $((SECONDS%3600/60)) minutes $((SECONDS%60)) seconds.\\n"

#------------------------------------------------------------------------------
# Load the offline_db.
if [[ "$LoadOfflineDB" -eq 1 ]]; then
   msg "${H2}\\nPhase 7C - Optional Post Op / Load offline_db."
   OfflineDB=${P4ROOT/root/offline_db}
   OfflineDBUsableFile="$OfflineDB/offline_db_usable.txt"

   cd "$OfflineDB" || bail "Could not cd to offline_db dir [$OfflineDB]."

   [[ "$PWD" == "/p4/${SDPInstance}/offline_db" ]] || bail "Unexpected OfflineDB value of: $OfflineDB"

   # Remove db.* and state* files, but not server.id or license files.
   Cmd="/bin/rm -f db.* state* $OfflineDBUsableFile"
   msg "Cleaning up databases and offline_db_usable.txt file with this command in $PWD:\\n$Cmd"
   eval "$Cmd" || bail "Failed to clean up old databases and state files in $OfflineDB"

   Cmd="$P4DBIN -r $OfflineDB $CompressFlag $CaseFlag"
   # For edge servers, ignore tables specified by $ExcludedTables, defined in
   # /p4/common/bin/edge_vars.
   if [[ "$ReplicaTypeTag" == "edge" ]]; then
      # shellcheck disable=SC2154
      Cmd+=" -K $ExcludedTables"
   fi

   if [[ "$DoParallelCheckpoints" -eq 1 ]]; then
      Cmd+=" -N $Threads -jrp $ParallelCheckpointDir"
   else
      Cmd+=" -jr $Checkpoint"
   fi

   msg "Replaying checkpoint to offline_db with this command:\\n$Cmd"
   eval "$Cmd" || bail "Checkpoint replay to offline_db failed."

   if [[ "$DoSchemaUpgrade" -eq 1 ]]; then
      Cmd="$P4DBIN -r $OfflineDB -t localhost:0.0.0.0 -xu"
      msg "Ensuring databases in offline_db are upgraded with this command:\\n$Cmd"
      eval "$Cmd" || bail "Database upgrade in offline_db failed."
   else
      msg "Skipping offline database schema upgrade ('p4d -xu') due to '-no_xu'."
   fi

   echo "Database restored successfully." > "$OfflineDBUsableFile" ||\
      bail "Failed to write this file: $OfflineDBUsableFile"
fi

if [[ "$ErrorCount" -eq 0 && "$WarningCount" -eq 0 ]]; then
   msg "\\nAll processing completed successfully.\\n"
elif [[ "$ErrorCount" -eq 0 ]]; then
   warnmsg "\\nProcessing completed successfully with no errors but $WarningCount warnings:\\n$(grep ^Warning: "$Log")\\n"
else
   errmsg "\\nProcessing completed, but $ErrorCount errors and $WarningCount warnings were reported. Review this log for more context. Summary of errors and warnings:\\n$(grep -E '^(Error|Warning):' "$Log")\\n"
fi

msg "\\nTime: Checkpoint load processing on $ThisHost took $((SECONDS/3600)) hours $((SECONDS%3600/60)) minutes $((SECONDS%60)) seconds.\\n"

# See the terminate() function where this script actually exits.
exit "$ErrorCount"