63 lines
2.5 KiB
Bash
Executable File
63 lines
2.5 KiB
Bash
Executable File
#!/bin/sh
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set -e -u
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EMQX_WAIT_TIME=${EMQX_WAIT_TIME:-5}
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emqx_exit(){
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# At least erlang.log.1 exists
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if [ -f /opt/emqx/log/erlang.log.1 ]; then
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# tail emqx.log.*
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erlang_log=$(echo $(ls -t /opt/emqx/log/erlang.log.*) | awk '{print $1}')
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num=$(sed -n -e '/LOGGING STARTED/=' ${erlang_log} | tail -1)
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[ ! -z $num ] && [ $num -gt 2 ] && tail -n +$(expr $num - 2) ${erlang_log}
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fi
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echo "['$(date -u +"%Y-%m-%dT%H:%M:%SZ")']:emqx exit abnormally"
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exit 1
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}
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## EMQ Main script
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# When receiving the EXIT signal, execute emqx_exit function
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trap "emqx_exit" EXIT
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# Start and run emqx, and when emqx crashed, this container will stop
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/opt/emqx/bin/emqx start
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# Sleep 5 seconds to wait for the loaded plugins catch up.
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sleep 5
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echo "['$(date -u +"%Y-%m-%dT%H:%M:%SZ")']:emqx start"
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## Fork tailing erlang.log, the fork is not killed after this script exits
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## The assumption is that this is the docker entrypoint,
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## hence docker container is terminated after entrypoint exists
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tail -f /opt/emqx/log/erlang.log.1 &
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# monitor emqx is running, or the docker must stop to let docker PaaS know
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# warning: never use infinite loops such as `` while true; do sleep 1000; done`` here
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# you must let user know emqx crashed and stop this container,
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# and docker dispatching system can known and restart this container.
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IDLE_TIME=0
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MGMT_CONF='/opt/emqx/etc/plugins/emqx_management.conf'
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MGMT_PORT=$(sed -n -r '/^management.listener.http[ \t]=[ \t].*$/p' $MGMT_CONF | sed -r 's/^management.listener.http = (.*)$/\1/g')
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while [ $IDLE_TIME -lt 5 ]; do
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IDLE_TIME=$(expr $IDLE_TIME + 1)
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if curl http://localhost:${MGMT_PORT}/status >/dev/null 2>&1; then
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IDLE_TIME=0
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# Print the latest erlang.log
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now_erlang_log=$(ps -ef |grep "tail -f /opt/emqx/log/erlang.log" |grep -v grep | sed -r "s/.*tail -f (.*)/\1/g")
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new_erlang_log="$(ls -t /opt/emqx/log/erlang.log.* | head -1)"
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if [ $now_erlang_log != $new_erlang_log ];then
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tail -f $new_erlang_log &
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kill $(ps -ef |grep "tail -f $now_erlang_log" | grep -v grep | awk '{print $1}')
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fi
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else
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echo "['$(date -u +"%Y-%m-%dT%H:%M:%SZ")']:emqx not running, waiting for recovery in $((25-IDLE_TIME*5)) seconds"
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fi
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sleep $EMQX_WAIT_TIME
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done
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# If running to here (the result 5 times not is running, thus in 25s emqx is not running), exit docker image
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# Then the high level PaaS, e.g. docker swarm mode, will know and alert, rebanlance this service
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