fix: don't leave lockfiles hanging around

.woodpecker.yml

@@ -4,7 +4,7 @@ pipeline:
     settings:
       registry: registry.nulo.in
       username: sutty
-      repo: registry.nulo.in/sutty/CHANGEME
+      repo: registry.nulo.in/sutty/prometheus
       tags:
       - ${ALPINE_VERSION}
       - latest

Dockerfile

@@ -2,3 +2,10 @@ ARG ALPINE_VERSION=3.13.6
 ARG BASE_IMAGE=sutty/monit
 FROM ${BASE_IMAGE}:${ALPINE_VERSION}
 MAINTAINER "f <f@sutty.nl>"
+
+RUN apk add --no-cache prometheus daemonize
+COPY ./monit.conf /etc/monit.d/prometheus.conf
+COPY ./prometheusd.sh /usr/local/bin/prometheusd
+
+EXPOSE 9090
+VOLUME /var/lib/prometheus

monit.conf

@@ -0,0 +1,4 @@
+check process prometheus with pidfile /tmp/prometheus.pid
+  start program = "/usr/local/bin/prometheusd start"
+   stop program = "/usr/local/bin/prometheusd stop"
+  if 5 restarts within 8 cycles then alert

prometheusd.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+pid=/tmp/prometheus.pid
+var=/var/lib/prometheus
+
+case $1 in
+  stop)
+    test ! -f $pid || cat ${pid} | xargs -r kill
+    rm -f ${pid}
+    ;;
+  start)
+    chown -R prometheus:prometheus "${var}"
+    chmod -R u=rwX,g=rX,o= "${var}"
+
+    daemonize -p "${pid}" -l "${pid}" -u prometheus -c "${var}" \
+      /usr/local/bin/syslogize \
+      /usr/bin/prometheus --config.file=/etc/prometheus/prometheus.yml --storage.tsdb.path="${var}/data"
+    ;;
+esac
+
+exit $?