Kovács Zoltán
449a5012a9
* 110-startlogs.sh no longer repeats existing log lines. * Added a missing ACL suggestion in nginx_xport.inc
118 lines
4.6 KiB
Bash
Executable File
118 lines
4.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# Configures the per-service log files for a running composed service.
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# This script does not yet handle the aggregate logging functionality.
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#
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# Author: Kovács Zoltán <kovacsz@marcusconsulting.hu>
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# License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
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#
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# 2025-03-29 v0.3
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# mod: no longer repeats existing log lines.
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# 2025-02-26 v0.2
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# fix: a silly typo (commandtring) blocked the startup.
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# 2025-02-02 v0.1 Initial release
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# Accepted environment variables and their defaults.
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PAR_BASEDIR=${PAR_BASEDIR:-""} # Service's base folder
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PAR_AGGLOGS=${PAR_AGGLOGS:-""} # Not empty for aggregated logs
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# Other initialisations.
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LOGDIR="logs"
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LOGFILE="logs/docker-compose.log" # For aggregated log
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YMLFILE="docker-compose.yml"
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# Messages.
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MSG_DOESNOTRUN="This service doesn't run."
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MSG_MISSINGDEP="Fatal: missing dependency"
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MSG_MISSINGYML="Fatal: didn't find the docker-compose.yml file"
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# Checks the dependencies.
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TR=$(which tr 2>/dev/null)
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if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
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for item in cut date dirname docker grep ps readlink tail
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do
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if [ -n "$(which $item)" ]
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then export $(echo $item | "$TR" '[:lower:]' '[:upper:]' | "$TR" '-' '_')=$(which $item)
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else echo "$MSG_MISSINGDEP $item." >&2; exit 1; fi
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done
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# All dependencies are available via "$THECOMMAND" (upper case) call.
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#
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# Let's find which version of docker-compose is installed.
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if [ $($DOCKER compose version >/dev/null 2>&1; echo $?) -eq 0 ]; then
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# We'll use v2 if it is available.
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DOCKER_COMPOSE="$DOCKER"
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commandstring="compose"
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else
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# Otherwise falling back to v1.
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DOCKER_COMPOSE="$(which docker-compose)"
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commandstring=""
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fi
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# One of the two is mandatory.
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if [ -z "$DOCKER_COMPOSE" ];then echo "$MSG_MISSINGDEP docker-compose" >&2; exit 1; fi
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# Below docker-compose should be called as "$DOCKER_COMPOSE" $commandstring sequence.
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# Where I'm?
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# https://gist.github.com/TheMengzor/968e5ea87e99d9c41782
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SOURCE="$0"
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while [ -h "$SOURCE" ]; do
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# resolve $SOURCE until the file is no longer a symlink
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SCRPATH="$( cd -P "$("$DIRNAME" "$SOURCE" )" && pwd )" #"
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SOURCE="$("$READLINK" "$SOURCE")"
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# if $SOURCE was a relative symlink, we need to resolve it
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# relative to the path where the symlink file was located
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[[ $SOURCE != /* ]] && SOURCE="$SCRPATH/$SOURCE"
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done; SCRPATH="$( cd -P "$("$DIRNAME" "$SOURCE" )" && pwd )" #"
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# Searches the base folder, containing a docker-compose.yml file.
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# Called from the base folder (./)?
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BASE_DIR="$PAR_BASEDIR"
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TEST_DIR="$SCRPATH"
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[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
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# Called from ./tools?
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TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
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[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
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# Called from ./tools/*.d?
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TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
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[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
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# On failure gives it up here.
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if [ -z "$BASE_DIR" -o ! -r "$BASE_DIR/$YMLFILE" ]; then
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echo "$MSG_MISSINGYML" >&2; exit 1
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fi
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# Quits silently if the service is not running.
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[[ -z "$(cd "$BASE_DIR"; "$DOCKER_COMPOSE" $commandstring ps --services --filter "status=running")" ]] && exit
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# Checks the logger(s), starts if it isn't running.
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# These process(es) will automatically terminate when the composed service stops.
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if [ -n "$PAR_AGGLOGS" ]; then
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# Aggregated logs
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# (cd "$BASE_DIR"; "$DOCKER_COMPOSE" $commandstring logs --no-color -t -f >> "$BASE_DIR/$LOGFILE" &)
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:
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else
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# Separate logs, each for every running service.
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for service in $(cd "$BASE_DIR"; "$DOCKER_COMPOSE" $commandstring ps --services) ""
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do
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if [ -n "$service" ]; then
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# Converts the service's name to an actual running container's name.
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container="$("$DOCKER" inspect -f '{{.Name}}' $(cd "$BASE_DIR"; "$DOCKER_COMPOSE" $commandstring ps -q "$service") | "$CUT" -c2-)"
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# It will not start the log process if it already exists.
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if [ -z "$("$PS" auxww | "$GREP" "$DOCKER" | "$GREP" 'logs' | "$GREP" "$container" )" ]; then
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# Determines the last existing log line in the log file (if any).
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logline="$("$TAIL" -n1 "$BASE_DIR/$LOGDIR/$service.log" 2>/dev/null)"
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# Gets the timestamp from this line.
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[[ -n "$logline" ]] \
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&& timestamp="$(echo "$logline" | "$CUT" -d' ' -f1 2>/dev/null)" \
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|| timestamp="invalid"
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# Checks the validity.
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[[ $("$DATE" -d "$timestamp" >/dev/null 2>&1; echo $?) -eq 0 ]] \
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&& since="$timestamp" \
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|| since="1970-01-01T00:00Z"
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# Only logs the new lines (actually repeats the last one - TODO!).
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"$DOCKER" logs -t --since "$since" -f $container >> "$BASE_DIR/$LOGDIR/$service.log" 2>&1 &
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fi
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fi
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done
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fi
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# That's all, Folks!
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