k8s基本概念-如何使用私有regsitry
私有 regsitry 使用示例准备资源
通过 secret 来使用
关联到 serviceAccounts
准备资源
一个私有 regsitry 地址、账号、密码
通过 secret 来使用
### 命令行登录一次 regsitry 后，生成配置：~/.docker/config.json
# docker login --username=xxx registry.cn-hangzhou.aliyuncs.com
### 准备一个 secret
# cat secrets/hub-aliyun-demo-project-ns-dev.yaml
apiVersion: v1
kind: Secret
metadata:
name: hub-aliyun-demo-project-ns-dev
namespace: ns-dev
data:
.dockerconfigjson: {base64 -w 0 ~/.docker/config.json}
type: kubernetes.io/dockerconfigjson
### 注意上述 {base64 -w 0 ~/.docker/config.json} 代表执行该指令后得到到结果：
# base64 -w 0 ~/.docker/config.json
### 创建 secret
# kubectl apply -f secrets/hub-aliyun-demo-project-ns-dev.yaml
# kubectl -n ns-dev get secrets
NAME TYPE DATA AGE
default-token-xb8lp kubernetes.io/service-account-token 3 4d
hub-aliyun-demo-project-ns-dev kubernetes.io/dockerconfigjson 1 6m
关联到 serviceAccounts
这样一来，每个 pod 创建时，将自动加载该资源
# kubectl -n ns-dev get serviceAccounts
NAME SECRETS AGE
default 1 4d
# kubectl -n ns-dev describe serviceAccounts/default
Name: default
Namespace: ns-dev
Labels: <none>
Annotations: <none>
Image pull secrets:<none>
Mountable secrets: default-token-xb8lp
Tokens: default-token-xb8lp
Events: <none>
关联
# kubectl -n ns-dev patch serviceaccount default -p '{"imagePullSecrets": [{"name": "hub-aliyun-demo-project-ns-dev"}]}'
serviceaccount "default" patched
# kubectl -n ns-dev describe serviceAccounts/default
Name: default
Namespace: ns-dev
Labels: <none>
Annotations: <none>
Image pull secrets: hub-aliyun-demo-project-ns-dev
Mountable secrets: default-token-xb8lp
Tokens: default-token-xb8lp
Events: <none>
##### 验证
```bash
### 准备一个服务
# cat whoami/k8s.ns-dev.yaml
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
name: s1
labels:
app.name: whoami
namespace: ns-dev
spec:
replicas: 1
selector:
matchLabels:
app.name: whoami
template:
metadata:
labels:
app.name: whoami
spec:
containers:
- name: whoami
image: registry.cn-hangzhou.aliyuncs.com/ns-demo-project/whoami:0.9
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: s1
labels:
app.name: whoami
namespace: ns-dev
spec:
selector:
app.name: whoami
ports:
- protocol: TCP
port: 80
targetPort: 80
nodePort: 30011
type: NodePort
# kubectl apply -f ./whoami/k8s.ns-dev.yaml --record
deployment "s1" created
service "s1" created
### 服务跑起来后，看看状态是否符合预期
# kubectl -n ns-dev get deploy/s1
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
s1 1 1 1 1 16s
# kubectl -n ns-dev get pods -l app.name=whoami
NAME READY STATUS RESTARTS AGE
s1-65b7fcbfd5-vn4n9 1/1 Running 0 1m
# curl localhost:30011
Hostname: s1-65b7fcbfd5-vn4n9
---- Http Request Headers ----
GET / HTTP/1.1
Host: localhost:30011
User-Agent: curl/7.29.0
Accept: */*
---- Active Endpoint ----
version: 0.9
curl 127.0.0.1/
curl 127.0.0.1/?wait=2s
curl 127.0.0.1/test
curl 127.0.0.1/api
curl 127.0.0.1/health
curl 127.0.0.1/health -d '302'
### 看一下 pods 的状态中 Image 相关的信息
# kubectl -n ns-dev describe pods -l app.name=whoami
Name: s1-65b7fcbfd5-vn4n9
Namespace: ns-dev
Node: tvm-02/10.10.9.69
Start Time: Tue, 02 Jan 2018 14:32:46 +0800
Labels: app.name=whoami
pod-template-hash=2163976981
Annotations: <none>
Status: Running
IP: 172.30.11.68
Controlled By:ReplicaSet/s1-65b7fcbfd5
Containers:
whoami:
Container ID: docker://c8e02546250e9e9083f659e315627a75235ae0098d6854293e26c97390ac82f2
Image: registry.cn-hangzhou.aliyuncs.com/ns-demo-project/whoami:0.9
Image ID: docker-pullable://opera443399/whoami@sha256:a05120d9fe157868f7f1c8b842cc860fb58665d74cadaf8eb7d6091af626cccd
Port: 80/TCP
State: Running
Started: Tue, 02 Jan 2018 14:32:47 +0800
Ready: True
Restart Count:0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-xb8lp (ro)
Conditions:
Type Status
Initialized True
Ready True
PodScheduled True
Volumes:
default-token-xb8lp:
Type: Secret (a volume populated by a Secret)
SecretName:default-token-xb8lp
Optional: false
QoS Class: BestEffort
Node-Selectors:<none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ -------- -------
NormalScheduled 1m default-scheduler Successfully assigned s1-65b7fcbfd5-vn4n9 to tvm-02
NormalSuccessfulMountVolume1m kubelet, tvm-02MountVolume.SetUp succeeded for volume "default-token-xb8lp"
NormalPulling 1m kubelet, tvm-02pulling image "registry.cn-hangzhou.aliyuncs.com/ns-demo-project/whoami:0.9"
NormalPulled 1m kubelet, tvm-02Successfully pulled image "registry.cn-hangzhou.aliyuncs.com/ns-demo-project/whoami:0.9"
NormalCreated 1m kubelet, tvm-02Created container
NormalStarted 1m kubelet, tvm-02Started container
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