When installing Ubuntu and Debian operating systems, by setting up a mirror site in the local area network, the installation process of apt software package can be greatly accelerated, while reducing the burden of the main server.

Here we share the method of establishing apt image service based on Kubernetes.

• For the apt image service container used, see https://github.com/openthings/apt-mirror-http-server
• For the script files used in this article, see https://github.com/openthings/kubernetes-tools/apt-mirror

Deploy to Kubernetes. The configuration file is as follows:

apiVersion: v1
kind: ServiceAccount
metadata:
  name: apt-mirror
  namespace: apt-mirror
---
kind: Service
apiVersion: v1
metadata:
  name: apt-mirror
  namespace: apt-mirror
  labels:
    app: apt-mirror
spec:
  ports:
    - name: mirror-server
      port: 80
  type: LoadBalancer
  selector:
    app: apt-mirror
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: apt-mirror
  namespace: apt-mirror
spec:
  selector:
    matchLabels:
      app: apt-mirror
  replicas: 1
  strategy:
    type: Recreate 
  template:
    metadata:
      labels:
        app: apt-mirror
    spec:
      serviceAccount: apt-mirror
      containers:
        - name: apt-mirror
          image: seterrychen/apt-mirror-http-server
          ports:
            - name: mirror-server
              containerPort: 80
          securityContext:
            capabilities:
              add:
                - DAC_READ_SEARCH
                - SYS_RESOURCE
          env:
            - name: RESYNC_PERIOD
              value: 12h
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: mirror-volume
              mountPath: /var/spool/apt-mirror
      volumes:
        - name: mirror-volume
          hostPath:
            path: /home/supermap/apt-mirror

We created a Deployment and a Service. The storage uses hostpath, just for the convenience of verifying the feasibility. In the production system, volumes can use NFS or other network distributed storage systems, so that they can be migrated, scaled and fault-tolerant.

Save the above file as mirror-server.sh and run:

kubectl create ns apt-mirror
kubectl apply -f mirror-server.yaml

You can install the service into the apt mirror namespace.

Then, access the address listed in the service in the browser. It can be obtained by the following command:

kubectl get svc -n apt-mirror

If there is a problem with the image download, you can try to download it separately, as follows:

docker pull seterrychen/apt-mirror-http-server