Configure a time zone for a container - Elastic Container Instance

This topic describes how to configure a time zone for a container to ensure that the time in the container is consistent with the time in the container environment. This prevents time inconsistency and inaccuracy caused by time zone errors.

Configuration example

Create a ConfigMap to import the time zone settings that you want to use.
For example, if you want to create a ConfigMap to import the time zone settings of Shanghai, run the following command. If you want to import other time zone settings, replace the /usr/share/zoneinfo/Asia/Shanghai file in the following command by using the file in the /usr/share/zoneinfo/ directory.
```
kubectl create configmap tz --from-file=/usr/share/zoneinfo/Asia/Shanghai
```

Create an application that is used to configure the time zone.

kubectl apply -f set-timezone.yaml

The following code provides an example of set-timezone.yaml.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: timezone
  labels:
    app: test
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      name: timezone
      labels:
        app: nginx
        alibabacloud.com/eci: "true" 
    spec:
      containers:
      - name: timezone
        image: registry.cn-shanghai.aliyuncs.com/eci_open/nginx:1.14.2
        volumeMounts:
          - name: tz
            mountPath: /etc/localtime   # The mount path.
            subPath: Shanghai       # Replace the parameter value by using the setting in your ConfigMap.
      volumes:
        - name: tz
          configMap:   # Mount the ConfigMap.
            name: tz

Verify the result

Log on to the container and check whether the time zone of the container is configured.

Query information about the pod.

kubectl get pod

Example output:

NAME                        READY   STATUS    RESTARTS   AGE
timezone-77cc64c57d-h59n8   1/1     Running   0          6

Access the container.
The following code provides a sample command. Replace <pod-name> with the actual name of your pod.
```
kubectl exec -it <pod-name> -- sh
```
Query the time zone of the container.
```
date -R
```
If the returned time is consistent with the time zone that you configured, the configuration is in effect. Example output:
```
Mon, 19 Feb 2024 17:24:00 +0800
```