47 lines
1.3 KiB
Bash
Executable file
47 lines
1.3 KiB
Bash
Executable file
#!/bin/bash
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#
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# Generate haproxy configuration whenever a change to one of the inputs for said
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# generation is detected.
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#
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cfgfile='/etc/haproxy/haproxy.cfg'
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rm -f "${cfgfile}.new"
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pid=0
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term_handler() {
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echo "$0: Received SIGTERM, shutting down ${pid}"
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if [ $pid -ne 0 ]; then
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kill -SIGTERM "$pid"
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wait "$pid"
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fi
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exit 143; # 128 + 15 -- SIGTERM
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}
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trap 'kill ${!}; term_handler' SIGTERM
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while [ 1 ]; do
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/opt/frontend/scripts/frontend-config $* print_haproxy_config > /etc/haproxy/haproxy.cfg.new
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changed=0
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if [ -s /etc/haproxy/haproxy.cfg.new ]; then
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cmp --quiet "${cfgfile}.new" "${cfgfile}" || changed=1
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if [ $changed -ne 0 ]; then
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echo "haproxy config changed:";
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diff -u "${cfgfile}" "${cfgfile}.new"
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# this mv will inotify-trigger the autoreload.sh in the haproxy container to reload haproxy
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mv "${cfgfile}.new" "${cfgfile}"
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else
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echo "haproxy config did not change"
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fi
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fi
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sleep 1 # spin control
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# The only things volume-mounted into these directories in the container where this runs
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# should be specific to this instance, so we're not triggering off updates to other instances
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inotifywait -q -r -e moved_to -e close_write /opt/frontend/api/backends /opt/frontend/config &
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pid=${!}
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wait $pid
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done
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