Update the clean image docker to support containerd

Author: Hai Chang

Dockerfile

@@ -1,5 +1,9 @@
-FROM docker
+FROM ubuntu
 
-ADD cleanup /etc/periodic/hourly
+RUN apt-get update && apt-get install cron -y && apt-get install wget -y
+RUN wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.23.0/crictl-v1.23.0-linux-amd64.tar.gz && tar zxvf crictl-v1.23.0-linux-amd64.tar.gz -C /usr/local/bin
+RUN rm -f crictl-v1.23.0-linux-amd64.tar.gz
+
+ADD cleanup /etc/cron.hourly
 
 CMD [ "/bin/sh", "-c", "crond -f"]

README.md

@@ -12,7 +12,7 @@ To prevent this problem I created this small docker utility.
 The following commands will be triggered on startup of the container.
 
 ```sh
-docker system prune -af
+crictl rmi --prune
 ```
 
 ## Usage
@@ -33,12 +33,12 @@ spec:
     stdinOnce: true
     tty: true
     volumeMounts:
-    - mountPath: /var/run/docker.sock
-      name: dockersock
+    - mountPath: /var/run/containerd/containerd.sock
+      name: containerdsock
       readOnly: true
   volumes:
-  - name: dockersock
+  - name: containerdsock
     hostPath:
-      path: /var/run/docker.sock
+      path: /var/run/containerd/containerd.sock
 EOF
 ```

cleanup

@@ -1,4 +1,4 @@
 #!/usr/bin/env sh
 
 echo 'Clean all:' `date` | tee -a /var/log/imagecleaner.log
-docker system prune -af | tee -a /var/log/imagecleaner.log
+crictl rmi --prune | tee -a /var/log/imagecleaner.log