镜像仓库registory中的秘钥管理

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镜像仓库中的秘钥管理

1 生成密钥

在使用私有镜像拉取镜像时，需要为私有镜像仓库创建一个镜像仓库的密钥，并在创建容器中进行引用。创建镜像仓库的语法和格式：

kubectl create secret docker–registry <regsecret-name> —docker–server=<your–registry–server> —docker–username=<your–name> —docker–password=<your–pword> —docker–email=<your–email>

<regsecret-name>：所创建的私有镜像仓库密钥的名称；
<your-registry-server>：为镜像仓库的服务器地址；
<your-name>：登录镜像仓库的用户名；
<your-pword>：登录镜像仓库的密码；
<your-email>：用户的邮箱地址。

假设登录私有镜像仓库的用户命名为admin、密码为admin、邮箱地址为admin@meng.com。则可以通过执行下面的命令创建私有镜像仓库的密钥：

$ kubectl create secret docker-registry myregsecret --docker-server=192.168.10.12:8484 \ --docker-username=admin --docker-password=admin --docker-email=admin@meng.com

使用 Apache 的 htpasswd 来创建加密文件

# yum install -y httpd-tools

# htpasswd -Bbn admin admin > /data/docker-auth/htpasswd

#启动

docker run -p 8484:5000 \

--restart=always \

--name registry \

-v /data/registry:/var/lib/registry \

-v /data/auth/:/auth/ \

-e "REGISTRY_AUTH=htpasswd" \

-e "REGISTRY_AUTH_HTPASSWD_REALM=Registry Realm" \

-e "REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd" \

-d registry

#/etc/docker/daemon.json

{

"exec-opts":["native.cgroupdriver=systemd"],

"registry-mirrors":["https://mirror.aliyuncs.com"],

"insecure-registries":["192.168.10.12:8484"]

}

#重启docker

systemctl daemon-reload

systemctl restart docker

登录 Docker Registry

登录可以是免交互式，也可以是交互式的

docker login -u 用户名 -p 密码 ip:端口 # 一般不建议使用明文密码

docker login -u 用户名 -p ip:端口 # 不输入密码，回车后，使用交互式输入密码（输入的密码不会显示）

docker login ip:端口 # 不输入密码和用户名，回车后，使用交互式输入用户名和密码（输入的密码不会显示）

登录

docker login 192.168.10.12:8484

admin

admin

[root@master01 data]# docker login 192.168.10.12:8484

Username: admin

Password:

WARNING! Your password will be stored unencrypted in /root/.docker/config.json.

Configure a credential helper to remove this warning. See

https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded

登出

docker logout 192.168.10.12:8484

[root@master01 data]# docker logout 192.168.10.12:8484

Removing login credentials for 192.168.10.12:8484

测试镜像

docker pull nginx

docker tag nginx:latest 192.168.10.12:8484/nginx:v1.0.0

[root@master01 data]# docker pull 192.168.10.12:8484/nginx:v1.0.0

Error response from daemon: Head "http://192.168.10.12:8484/v2/nginx/manifests/v1.0.0": no basic auth credentials

docker push 192.168.10.12:8484/nginx:v1.0.0

#去除污点

kubectl taint nodes master01 node-role.kubernetes.io/master

#删除本地镜像

docker rmi 192.168.10.12:8484/nginx:v1.0.0

#nginx.yaml文件

[root@master01 registry]# cat nginx.yaml

apiVersion: apps/v1
kind: Deployment
metadata:name: deploy-nginx-v1
spec:replicas: 1selector:matchLabels:app: svc-nginx-30083
template:metadata:labels:app: svc-nginx-30083spec:containers:- name: svc-nginx-v1image: 192.168.10.12:8484/nginx:v1.0.0imagePullPolicy: IfNotPresentports:- containerPort: 80

#创建nginx

[root@master01 registry]# kubectl create -f nginx.yaml

deployment.apps/deploy-nginx-v1 created

#查询状态

[root@master01 registry]# kubectl get pods

NAME READY STATUS RESTARTS AGE

deploy-nginx-v1-85979f6644-jnxnb 0/1 ImagePullBackOff 0 44s

[root@master01 registry]# kubectl describe pods deploy-nginx-v1-85979f6644-jnxnb

Normal Pulling 20s (x3 over 57s) kubelet Pulling image "192.168.10.12:8484/nginx:v1.0.0"

Warning Failed 20s (x3 over 57s) kubelet Failed to pull image "192.168.10.12:8484/nginx:v1.0.0": rpc error: code = Unknown desc = Error response from daemon: Head "http://192.168.10.12:8484/v2/nginx/manifests/v1.0.0": no basic auth credentials

Warning Failed 20s (x3 over 57s) kubelet Error: ErrImagePull

Normal BackOff 7s (x4 over 57s) kubelet Back-off pulling image "192.168.10.12:8484/nginx:v1.0.0"

Warning Failed 7s (x4 over 57s) kubelet Error: ImagePullBackOff

#修复

1.本机登录镜像仓库

2.拉取镜像时增加secret

创建secret

kubectl create secret docker-registry registry-10.12 --docker-server=192.168.10.12:8484 --docker-username=admin --docker-password=admin

查看secret

[root@master01 registry]# kubectl get secret

NAME TYPE DATA AGE

default-token-bmtqm kubernetes.io/service-account-token 3 26h

registry-10.12 kubernetes.io/dockerconfigjson 1 10s

#查看详情

kubectl describe secret registry-10.12

kubectl get secret registry-10.12 -o yaml

#修改nginx.yaml文件，增加参数

imagePullSecrets:

- name: registry-10.12

apiVersion: apps/v1
kind: Deployment
metadata:name: deploy-nginx-v1
spec:replicas: 1selector:matchLabels:app: svc-nginx-30083template:metadata:labels:app: svc-nginx-30083spec:containers:- name: svc-nginx-v1image: 192.168.10.12:8484/nginx:v1.0.0imagePullPolicy: IfNotPresentports:- containerPort: 80imagePullSecrets:- name: registry-10.12

#应用更新

kubectl apply -f nginx.yaml

#

[root@master01 registry]# kubectl get secret

NAME TYPE DATA AGE

default-token-bmtqm kubernetes.io/service-account-token 3 26h

registry-10.12 kubernetes.io/dockerconfigjson 1 21m

[root@master01 registry]# kubectl delete secret registry-10.12

secret "registry-10.12" deleted

[root@master01 registry]# kubectl get secret

NAME TYPE DATA AGE

default-token-bmtqm kubernetes.io/service-account-token 3 26h

[root@master01 registry]# ls

nginx.yaml

[root@master01 registry]# kubectl delete -f nginx.yaml

deployment.apps "deploy-nginx-v1" deleted

[root@master01 registry]# ls

nginx.yaml

[root@master01 registry]# kubectl get pods

No resources found in default namespace.

[root@master01 registry]# kubectl create secret docker-registry registry-10.12 --docker-server=192.168.10.12:8484 --docker-username=admin --docker-password=admin

secret/registry-10.12 created

[root@master01 registry]# kubectl get secret

NAME TYPE DATA AGE

default-token-bmtqm kubernetes.io/service-account-token 3 26h

registry-10.12 kubernetes.io/dockerconfigjson 1 8s

[root@master01 registry]# kubectl apply -f nginx.yaml

deployment.apps/deploy-nginx-v1 created

[root@master01 registry]# kubectl get pods

NAME READY STATUS RESTARTS AGE

deploy-nginx-v1-56447d94c6-5n2z6 1/1 Running 0 2s

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