openshift_hosted: Add docker-gc

Two new inventory variables have been created:

- openshift_crio_enable_docker_gc: Enable docker_gc daemon set
- openshift_crio_docker_gc_node_selector: Optional dictionary to use node
selector

When openshift_crio_enable_docker_gc and openshift_use_crio are both true
then dockergc daemonset will be created along with adding a dockergc
sa.

Signed-off-by: Steve Milner <smilner@redhat.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/roles/openshift_docker_gc/templates/dockergc-ds.yaml.j2 b/roles/openshift_docker_gc/templates/dockergc-ds.yaml.j2
new file mode 100644
index 000000000..53e8b448b
--- /dev/null
+++ b/roles/openshift_docker_gc/templates/dockergc-ds.yaml.j2
@@ -0,0 +1,58 @@
+apiVersion: v1
+kind: List
+items:
+- apiVersion: v1
+  kind: ServiceAccount
+  metadata:
+    name: dockergc
+  # You must grant privileged via: oadm policy add-scc-to-user -z dockergc privileged
+  # in order for the dockergc to access the docker socket and root directory
+- apiVersion: extensions/v1beta1
+  kind: DaemonSet
+  metadata:
+    name: dockergc
+    labels:
+      app: dockergc
+  spec:
+    template:
+      metadata:
+        labels:
+          app: dockergc
+        name: dockergc
+      spec:
+{# Only set nodeSelector if the dict is not empty #}
+{% if r_docker_gc_node_selectors %}
+        nodeSelector:
+{% for k,v in r_docker_gc_node_selectors.items() %}
+          {{ k }}: {{ v }}{% endfor %}{% endif %}
+
+        serviceAccountName: dockergc
+        containers:
+        - image: openshift/origin:latest
+          args:
+          - "ex"
+          - "dockergc"
+          - "--image-gc-low-threshold=60"
+          - "--image-gc-high-threshold=80"
+          - "--minimum-ttl-duration=1h0m0s"
+          securityContext:
+            privileged: true
+          name: dockergc
+          resources:
+            requests:
+              memory: 30Mi
+              cpu: 50m
+          volumeMounts:
+          - name: docker-root
+            readOnly:  true
+            mountPath: /var/lib/docker
+          - name: docker-socket
+            readOnly:  false
+            mountPath: /var/run/docker.sock
+        volumes:
+        - name: docker-root
+          hostPath:
+            path: /var/lib/docker
+        - name: docker-socket
+          hostPath:
+            path: /var/run/docker.sock