From c22e63e98106b1007094aa37731f57a9e0ca44c0 Mon Sep 17 00:00:00 2001
From: Ricardo Matsui <ricmatsui@gmail.com>
Date: Sun, 19 Nov 2017 23:46:20 -0800
Subject: [PATCH] Restart unison if CPU usage high

---
 Dockerfile             | 6 ++++--
 monitrc                | 4 ++++
 supervisor.daemon.conf | 8 +++++++-
 3 files changed, 15 insertions(+), 3 deletions(-)
 create mode 100644 monitrc

diff --git a/Dockerfile b/Dockerfile
index 02d01e3..783ecdd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:edge
 
 ARG UNISON_VERSION=2.48.4
-RUN apk add --no-cache build-base curl bash supervisor inotify-tools rsync ruby\
+RUN apk add --no-cache build-base curl bash monit supervisor inotify-tools rsync ruby\
     && apk add --update-cache --repository http://dl-4.alpinelinux.org/alpine/edge/testing/ ocaml \
     && curl -L https://github.com/bcpierce00/unison/archive/$UNISON_VERSION.tar.gz | tar zxv -C /tmp \
     && cd /tmp/unison-${UNISON_VERSION} \
@@ -26,6 +26,7 @@ ENV TZ="Europe/Helsinki" \
 
 COPY entrypoint.sh /entrypoint.sh
 COPY precopy_appsync.sh /usr/local/bin/precopy_appsync
+COPY monitrc /etc/monitrc
 
 RUN mkdir -p /docker-entrypoint.d \
  && chmod +x /entrypoint.sh \
@@ -33,7 +34,8 @@ RUN mkdir -p /docker-entrypoint.d \
  && mkdir /unison \
  && touch /tmp/unison.log \
  && chmod u=rw,g=rw,o=rw /tmp/unison.log \
- && chmod +x /usr/local/bin/precopy_appsync
+ && chmod +x /usr/local/bin/precopy_appsync \
+ && chmod u=rw,g=,o= /etc/monitrc
 
 COPY supervisord.conf /etc/supervisord.conf
 COPY supervisor.daemon.conf /etc/supervisor.conf.d/supervisor.daemon.conf
diff --git a/monitrc b/monitrc
new file mode 100644
index 0000000..91214c1
--- /dev/null
+++ b/monitrc
@@ -0,0 +1,4 @@
+check process unison with pidfile /var/run/unison.pid
+  start program = "/bin/bash -c 'supervisorctl start unison && supervisorctl pid unison > /var/run/unison.pid'"
+  stop program = "/bin/bash -c 'supervisorctl stop unison && rm -rf /var/run/unison.pid'"
+  if cpu usage > 50% for 2 cycles then restart
diff --git a/supervisor.daemon.conf b/supervisor.daemon.conf
index 150dc2a..c06906a 100644
--- a/supervisor.daemon.conf
+++ b/supervisor.daemon.conf
@@ -4,4 +4,10 @@ user = %(ENV_OWNER)s
 directory = %(ENV_APP_VOLUME)s
 environment=HOME="%(ENV_OWNER_HOMEDIR)s",USER="%(ENV_OWNER)s"
 redirect_stderr = true
-autorestart=true
\ No newline at end of file
+autorestart=true
+
+[program:monit]
+command = monit -c /etc/monitrc -d 5 -v -I
+redirect_stderr = true
+autorestart = true
+priority = 1000