upgrade janitor to latest image version, docker 1.9+ support (#154)

* Janitor: new docker-cleanup image version

The initial motivation for this version bump is support for docker 1.9+
Currently volumes don't get removed properly and lead to containers to
stall at start up, which is a pain to diagnose in rancher.

ref: https://github.com/meltwater/docker-cleanup/issues/24

* janitor: add support for KEEP_CONTAINERS_NAMED feature

* janitor: document '**None**' and '**All**'

* janitor: run with privileged mode unconditionnally

According to @sshipway, it seemed to be incompatible with a lot of
docker/rancher versions.

* janitor: bump docker-cleanup image version to 1.8.0

templates/janitor/3/docker-compose.yml

@@ -0,0 +1,20 @@
+cleanup:
+  image: meltwater/docker-cleanup:1.8.0
+  environment:
+    CLEAN_PERIOD: ${FREQUENCY}
+    DELAY_TIME: "900"
+    KEEP_IMAGES: "${KEEP}"
+    KEEP_CONTAINERS: "${KEEPC}"
+    KEEP_CONTAINERS_NAMED: "${KEEPCN}"
+    LOOP: "true"
+    DEBUG: "0"
+  labels:
+     io.rancher.scheduler.global: "true"
+     io.rancher.scheduler.affinity:host_label_ne: "${EXCLUDE_LABEL}"
+  net: none
+  privileged: true
+  tty: false
+  stdin_open: false
+  volumes:
+    - /var/run/docker.sock:/var/run/docker.sock
+    - /var/lib/docker:/var/lib/docker

templates/janitor/3/rancher-compose.yml

@@ -0,0 +1,36 @@
+.catalog:
+  name: "Janitor"
+  version: "v1.7"
+  description: "Docker cleanup"
+  uuid: janitor-3
+  questions:
+    - variable: "FREQUENCY"
+      label: "Frequency"
+      description: "Run the cleanup on a cycle of this many seconds"
+      default: 3600
+      required: true
+      type: "int"
+    - variable: "EXCLUDE_LABEL"
+      label: "Exclude label"
+      description: "Specify a Rancher host label here that will be used to determine on which hosts the Janitor container should not deploy."
+      default: janitor.exclude=true
+      required: true
+      type: "string"
+    - variable: "KEEP"
+      label: "Keep images"
+      description: "A comma separated list of images that should never be removed. These are left-anchored Bash Shell Wildcard patterns."
+      default: "rancher/"
+      required: false
+      type: "string"
+    - variable: "KEEPC"
+      label: "Keep containers"
+      description: "A comma separated list of images that should never have stopped containers removed. These are left-anchored Bash Shell Wildcard patterns."
+      default: "*:*"
+      required: false
+      type: "string"
+    - variable: "KEEPCN"
+      label: "Keep named containers"
+      description: "A comma separated list of names of exited or dead container that should never be removed. These are left-anchored Bash Shell Wildcard patterns."
+      default: "**None**"
+      required: false
+      type: "string"

templates/janitor/README.md

@@ -15,13 +15,13 @@ that are taking up space; note that this may not be what you want if you
 are using stopped containers to hold volumes!  If this is the case, use the
 Keep List below.
 
-This cleanup will help to prevent the /var/lib/docker filesystem from filling 
+This cleanup will help to prevent the /var/lib/docker filesystem from filling
 up with old and unused container images, which is an issue on lighter-weight
 Docker hosts.
 
 ### Keep list
 
-You can specify match patterns for unused Images, and stopped Containers, 
+You can specify match patterns for unused Images, and stopped Containers,
 which should be excluded from the cleanup.
 
 The match patterns are comma-separated Left Anchored Bash Shell wildcard
@@ -40,9 +40,11 @@ However it will not match
 * bar:latest
 * foo/\*:v1
 
-By default, nothing will be matched.  If you want to match everything, 
+By default, nothing will be matched.  If you want to match everything,
 then use a pattern **\*:\***
 
+The self-descriptive values '\*\*None\*\*' and '\*\*All\*\*' can also be used.
+
 ### Warning
 
 If you are using 'run-once' sidekick containers that mount a volume, then

templates/janitor/config.yml

@@ -1,7 +1,7 @@
 name: Janitor
 description: |
   Automatic cleanup of unused images on hosts, in order to save disk space.
-version: v1.6
+version: v1.7
 category: Monitoring
 maintainer: Steve Shipway <s.shipway@auckland.ac.nz>