85 lines
1.5 KiB
Bash
Executable File
85 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# set -x
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#
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# This script need to run as PID 1 allowing it to receive signals from docker
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#
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# Usage: add the folowing lines in Dockerfile
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# ENTRYPOINT ["docker-entrypoint.sh"]
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# CMD runsvdir -P ${SVDIR}
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#
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#
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# Variables
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#
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DOCKER_ENTRY_DIR=${DOCKER_ENTRY_DIR-/etc/docker/entry.d}
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DOCKER_EXIT_DIR=${DOCKER_EXIT_DIR-/etc/docker/exit.d}
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SVDIR=${SVDIR-/etc/service}
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#
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# Source common functions.
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#
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. docker-common.sh
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. docker-config.sh
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#
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# Functions
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#
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#
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# run_parts dir
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# Read and execute commands from files in the _current_ shell environment
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#
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run_parts() {
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for file in $(find $1 -type f -executable 2>/dev/null|sort); do
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dc_log 7 run_parts: executing $file
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. $file
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done
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}
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#
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# If the service is running, send it the TERM signal, and the CONT signal.
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# If both files ./run and ./finish exits, execute ./finish.
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# After it stops, do not restart the service.
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#
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sv_down() { sv down ${SVDIR}/* ;}
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#
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# SIGTERM handler
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# docker stop first sends SIGTERM, and after a grace period, SIGKILL.
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# use exit code 143 = 128 + 15 -- SIGTERM
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#
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term_trap() {
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dc_log 4 "Got SIGTERM, so shutting down."
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run_parts "$DOCKER_EXIT_DIR"
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sv_down
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exit 143
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}
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#
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# Stage 0) Register signal handlers and redirect stderr
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#
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exec 2>&1
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trap 'kill $!; term_trap' SIGTERM
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#
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# Stage 1) run all entry scripts in $DOCKER_ENTRY_DIR
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#
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run_parts "$DOCKER_ENTRY_DIR"
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#
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# Stage 2) run provided arguments in the background
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# Start services with: runsvdir -P ${SVDIR}
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#
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"$@" &
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#
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# Stage 3) wait forever so we can catch the SIGTERM
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#
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while true; do
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tail -f /dev/null & wait $!
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done
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