Add support for supervisord as a monit alternative.

cluster/saltbase/salt/supervisor/docker-checker.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is intended to start the docker and then loop until
+# it detects a failure.  It then exits, and supervisord restarts it
+# which in turn restarts docker.
+
+/etc/init.d/docker stop
+/etc/init.d/docker start
+
+echo "waiting a minute for startup"
+sleep 60
+
+while true; do
+  if ! sudo timeout 10 docker version > /dev/null; then
+    echo "Docker failed!"
+    exit 2
+  fi
+  sleep 10
+done
+

cluster/saltbase/salt/supervisor/docker.conf

@@ -0,0 +1,6 @@
+[program:docker]
+command=/usr/sbin/docker-checker.sh
+stderr_logfile=/var/log/supervisor/docker-stderr.log
+stdout_logfile=/var/log/supervisor/docker-stdout.log
+autorestart=true
+startretries=1000000

cluster/saltbase/salt/supervisor/init.sls

@@ -0,0 +1,125 @@
+{% if not pillar.get('is_systemd') %}
+
+supervisor:
+  pkg:
+    - installed
+
+monit:
+  pkg:
+    - purged
+
+/etc/supervisor/conf.d/docker.conf:
+  file:
+    - managed
+    - source: salt://supervisor/docker.conf
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+    - require_in:
+      - pkg: supervisor
+    - require:
+      - file: /usr/sbin/docker-checker.sh
+
+/usr/sbin/docker-checker.sh:
+  file:
+    - managed
+    - source: salt://supervisor/docker-checker.sh
+    - user: root
+    - group: root
+    - mode: 755
+    - makedirs: True
+
+/etc/supervisor/conf.d/kubelet.conf:
+  file:
+    - managed
+    - source: salt://supervisor/kubelet.conf
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+    - require_in: 
+      - pkg: supervisor
+    - require: 
+      - file: /usr/sbin/kubelet-checker.sh
+
+/usr/sbin/kubelet-checker.sh:
+  file:
+    - managed
+    - source: salt://supervisor/kubelet-checker.sh
+    - user: root
+    - group: root
+    - mode: 755
+    - makedirs: True
+
+{% if "kubernetes-pool" in grains.get('roles', []) %}
+/etc/supervisor/conf.d/kube-proxy.conf:
+  file:
+    - managed
+    - source: salt://supervisor/kube-proxy.conf
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+    - require_in: 
+      - pkg: supervisor
+    - require: 
+      - file: /usr/sbin/kube-proxy-checker.sh
+
+/usr/sbin/kube-proxy-checker.sh:
+  file:
+    - managed
+    - source: salt://supervisor/kube-proxy-checker.sh
+    - user: root
+    - group: root
+    - mode: 755
+    - makedirs: True
+{% endif %}
+
+{% if grains['roles'][0] == 'kubernetes-master' -%}
+/etc/supervisor/conf.d/kube-addons.conf:
+  file:
+    - managed
+    - source: salt://supervisor/kube-addons.conf
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+    - require_in: 
+      - pkg: supervisor
+    - require: 
+      - file: /usr/sbin/kube-addons-checker.sh
+
+/usr/sbin/kube-addons-checker.sh:
+  file:
+    - managed
+    - source: salt://supervisor/kube-addons-checker.sh
+    - user: root
+    - group: root
+    - mode: 755
+    - makedirs: True
+{% endif %}
+
+/etc/supervisor/supervisor_watcher.sh:
+  file.managed:
+    - source: salt://supervisor/supervisor_watcher.sh
+    - user: root
+    - group: root
+    - mode: 755
+    - makedirs: True
+
+crontab -l | { cat; echo "* * * * * /etc/supervisor/supervisor_watcher.sh 2>&1 | logger"; } | crontab -:
+  cmd.run:
+  - unless: crontab -l | grep "* * * * * /etc/supervisor/supervisor_watcher.sh 2>&1 | logger"
+
+supervisor-service:
+  service:
+    - running
+    - name: supervisor
+    - watch:
+      - pkg: supervisor
+      - file: /etc/supervisor/conf.d/*
+    - require:
+      - pkg: supervisor
+
+{% endif %}

cluster/saltbase/salt/supervisor/kube-addons-checker.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is intended to start the kube-addons and then loop until
+# it detects a failure.  It then exits, and supervisord restarts it
+# which in turn restarts the kube-addons.
+
+/etc/init.d/kube-addons stop
+/etc/init.d/kube-addons start
+
+echo "waiting a minute for startup"
+sleep 60
+
+while true; do
+  if ! /etc/init.d/kube-addons status > /dev/null; then
+    echo "kube-addons failed!"
+    exit 2
+  fi
+  sleep 10
+done
+

cluster/saltbase/salt/supervisor/kube-addons.conf

@@ -0,0 +1,6 @@
+[program:kube-addons]
+command=/usr/sbin/kube-addons-checker.sh
+stderr_logfile=/var/log/supervisor/kube-addons-stderr.log
+stdout_logfile=/var/log/supervisor/kube-addons-stdout.log
+autorestart=true
+startretries=1000000

cluster/saltbase/salt/supervisor/kube-proxy-checker.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is intended to start the kube-proxy and then loop until
+# it detects a failure.  It then exits, and supervisord restarts it
+# which in turn restarts the kube-proxy.
+
+/etc/init.d/kube-proxy stop
+/etc/init.d/kube-proxy start
+
+echo "waiting a minute for startup"
+sleep 60
+
+max_seconds=10
+
+while true; do
+  if ! curl -m ${max_seconds} -f -s http://127.0.0.1:10249/healthz > /dev/null; then
+    echo "kube-proxy failed!"
+    exit 2
+  fi
+  sleep 10
+done
+

cluster/saltbase/salt/supervisor/kube-proxy.conf

@@ -0,0 +1,6 @@
+[program:kube-proxy]
+command=/usr/sbin/kube-proxy-checker.sh
+stderr_logfile=/var/log/supervisor/kube-proxy-stderr.log
+stdout_logfile=/var/log/supervisor/kube-proxy-stdout.log
+autorestart=true
+startretries=1000000

cluster/saltbase/salt/supervisor/kubelet-checker.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is intended to start the kubelet and then loop until
+# it detects a failure.  It then exits, and supervisord restarts it
+# which in turn restarts the kubelet.
+
+/etc/init.d/kubelet stop
+/etc/init.d/kubelet start
+
+echo "waiting a minute for startup"
+sleep 60
+
+max_seconds=10
+
+while true; do
+  if ! curl -m ${max_seconds} -f -s http://127.0.0.1:10255/healthz > /dev/null; then
+    echo "kubelet failed!"
+    exit 2
+  fi
+  sleep 10
+done
+

cluster/saltbase/salt/supervisor/kubelet.conf

@@ -0,0 +1,6 @@
+[program:kubelet]
+command=/usr/sbin/kubelet-checker.sh
+stderr_logfile=/var/log/supervisor/kubelet-stderr.log
+stdout_logfile=/var/log/supervisor/kubelet-stdout.log
+autorestart=true
+startretries=1000000

cluster/saltbase/salt/supervisor/supervisor_watcher.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is invoked by crond every minute to check if supervisord is
+# up and oom protected. If down it restarts supervisord; otherwise, it exits
+# after applying oom_score_adj
+
+PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+
+if ! /etc/init.d/supervisor status > /dev/null; then
+    service supervisor start
+    sleep 10
+fi
+
+# Apply oom_score_adj: -901 to processes
+pids=$(cat /var/run/supervisord.pid)
+for pid in "${pids}"; do
+    echo -901 > /proc/$pid/oom_score_adj
+done
+
+

cluster/saltbase/salt/top.sls

@@ -26,7 +26,11 @@ base:
   {% endif %}
 {% endif %}
     - logrotate
+{% if grains['cloud'] is defined and grains.cloud == 'gce' %}
+    - supervisor
+{% else %}
     - monit
+{% endif %}
 
   'roles:kubernetes-master':
     - match: grain
@@ -35,7 +39,11 @@ base:
     - kube-apiserver
     - kube-controller-manager
     - kube-scheduler
+{% if grains['cloud'] is defined and grains.cloud == 'gce' %}
+    - supervisor
+{% else %}
     - monit
+{% endif %}
 {% if grains['cloud'] is defined and not grains.cloud in [ 'aws', 'gce', 'vagrant' ] %}
     - nginx
 {% endif %}