如何使用git同步镜像作为git周期性拉取的kubernetes中的sidecar

Question

我正试图在kubernetes中使用git sync映像作为侧车，它定期运行git pull并将克隆的数据装载到共享卷。

当我将其配置为同步一次时，一切都很好。我想周期性地运行它，比如每10分钟运行一次。不知怎的，当我将其配置为定期运行时，pod初始化失败了。

我阅读了文档，但找不到合适的答案。如果你能帮我弄清楚我的配置中缺少了什么，那就太好了。

这是我失败的配置。

部署

apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx-helloworld
image: nginx
ports:
- containerPort: 80
volumeMounts:
- mountPath: "/usr/share/nginx/html"
name: www-data
initContainers:
- name: git-sync
image: k8s.gcr.io/git-sync:v3.1.3
volumeMounts:
- name: www-data
mountPath: /data
env:
- name: GIT_SYNC_REPO
value: "https://github.com/musaalp/design-patterns.git" ##repo-path-you-want-to-clone
- name: GIT_SYNC_BRANCH
value: "master" ##repo-branch
- name: GIT_SYNC_ROOT
value: /data
- name: GIT_SYNC_DEST
value: "hello" ##path-where-you-want-to-clone
- name: GIT_SYNC_PERIOD
value: "10"
- name: GIT_SYNC_ONE_TIME
value: "false"
securityContext:
runAsUser: 0
volumes:
- name: www-data
emptyDir: {}

吊舱

apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
run: nginx-helloworld
name: nginx-helloworld
spec:
containers:
- image: nginx
name: nginx-helloworld
resources: {}
dnsPolicy: ClusterFirst
restartPolicy: Never
status: {}

Answer 1

您将git-sync用作initContainers，它仅在初始化(生命周期中运行一次(期间运行

Pod可以有多个容器在其中运行应用程序，但它也可以有一个或多个init容器，这些容器在应用程序容器启动之前运行。

Init容器与常规容器完全相同，除了：

• 初始化容器总是运行到完成
• 每个init容器都必须成功完成，然后才能启动下一个容器。init容器

所以将其用作常规容器

apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: git-sync
image: k8s.gcr.io/git-sync:v3.1.3
volumeMounts:
- name: www-data
mountPath: /data
env:
- name: GIT_SYNC_REPO
value: "https://github.com/musaalp/design-patterns.git" ##repo-path-you-want-to-clone
- name: GIT_SYNC_BRANCH
value: "master" ##repo-branch
- name: GIT_SYNC_ROOT
value: /data
- name: GIT_SYNC_DEST
value: "hello" ##path-where-you-want-to-clone
- name: GIT_SYNC_PERIOD
value: "20"
- name: GIT_SYNC_ONE_TIME
value: "false"
securityContext:
runAsUser: 0
- name: nginx-helloworld
image: nginx
ports:
- containerPort: 80
volumeMounts:
- mountPath: "/usr/share/nginx/html"
name: www-data
volumes:
- name: www-data
emptyDir: {}