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#!/bin/sh
set -eu
textfile_directory=/run/prom
s6rc_service_is_up() {
if s6-rc -a list | grep -q "${1:?}"; then printf '1'; else printf '0'; fi
}
printmetric() {
local name=${1:?}
local labels=${2:?}
local value=${3:?}
printf '%s{%s} %s\n' "$name" "$labels" "$value"
}
services_count() {
printf '# HELP s6_rc_services_count number of services\n'
printf '# TYPE s6_rc_services_count gauge\n'
for bundle in $(s6-rc-db list bundles); do
printmetric 's6_rc_services_count' \
$(printf 'bundle="%s"' $bundle) \
$(s6-rc list $bundle | wc -l)
done
}
services_up() {
printf '# HELP s6_rc_service_up if a service is running\n'
#printf '# TYPE s6_rc_service_up stateset\n'
for bundle in $(s6-rc-db list bundles)
do
for service in $(s6-rc-db contents "$bundle")
do
printmetric 's6_rc_service_up' \
$(printf 'bundle="%s",service="%s"' $bundle $service) \
$(s6rc_service_is_up $service)
done
done
}
write_textfile() {
mkdir -p "$textfile_directory" || exit 1
tmp=$(mktemp --tmpdir metrics_s6_rc.XXXXX)
(
services_count
services_up
) | tee "$tmp"
mv -v "$tmp" "$textfile_directory"/s6_rc.prom || exit 1
chmod +r "$textfile_directory"/s6_rc.prom
chown nobody:nobody "$textfile_directory"/s6_rc.prom
}
main() {
write_textfile
}
main >/dev/null 2>&1
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