問題現(xiàn)象:

[root@localhost ~]# docker image pull xxx.com.cn/centos7

Using default tag: latest

Error response from daemon: Get https://xxx.com.cn/v1/_ping: x509: certificate has expired or is not yet valid

可能的原因分析:

linux使用查看date查看當(dāng)前時(shí)間,與證書的有效時(shí)間作比對(duì),得出具體的原因,可能為以下二種之一:

1.本機(jī)的時(shí)間不對(duì);

2.Registry的證書確實(shí)已過期;

解決方法:1.本機(jī)的時(shí)間不對(duì);

修改本機(jī)時(shí)間即可

2.Registry的證書確實(shí)已過期;

對(duì) Registry 創(chuàng)建 SSL 安全例外,放棄對(duì) Registry 服務(wù)器證書合法性校驗(yàn),但是具有安全風(fēng)險(xiǎn).

insecure registries 使能后, Docker 將以以下步驟嘗試https連接:

首先嘗試使用HTTPS.

如果 HTTPS 連接可達(dá)但是證書不可用, 忽略證書錯(cuò)誤;

如果 HTTPS 連接不可用, 使用 HTTP.

centos 在 /etc/docker/ 目錄下創(chuàng)建daemon的配置文件 daemon.json ,將你的目標(biāo) Registry 所處的 IP 地址段或者具體的服務(wù)域名端口號(hào)寫入 json 文件,

舉個(gè)例子,筆者的服務(wù)器所在網(wǎng)段為10.0.0.0/8.那么內(nèi)容如下:

{ 'insecure-registries' : ['10.0.0.0/8']}

也可以使用域名加端口號(hào),示例如下:

{ 'insecure-registries' : ['myregistrydomain.com:5000']}

windows 則修改文件 C:ProgramDatadockerconfigdaemon.json ,格式與linux操作的一樣.

重啟docker服務(wù).

查看是否生效,注意 Insecure Registries 字段.

[root@localhost ~]# docker info docker info :Containers: 0 Running: 0 Paused: 0 Stopped: 0Images: 2Server Version: 17.05.0-ceStorage Driver: overlay Backing Filesystem: xfs Supports d_type: trueLogging Driver: json-fileCgroup Driver: cgroupfsPlugins: Volume: local Network: bridge host macvlan null overlaySwarm: inactiveRuntimes: runcDefault Runtime: runcInit Binary: docker-initcontainerd version: 9048e5e50717ea4497b757314bad98ea3763c145runc version: 9c2d8d184e5da67c95d601382adf14862e4f2228init version: 949e6faSecurity Options: seccomp Profile: defaultKernel Version: 3.10.0-693.el7.x86_64Operating System: CentOS Linux 7 (Core)OSType: linuxArchitecture: x86_64CPUs: 24Total Memory: 62.74GiBName: localhost.localdomainID: 755F:OEFV:VP3S:BMGQ:VUFW:WGT5:YQHO:EW6T:AAVE:NHS2:TPV3:SBTJDocker Root Dir: /var/lib/dockerDebug Mode (client): falseDebug Mode (server): falseRegistry: https://index.docker.io/v1/Experimental: falseInsecure Registries: 10.0.0.0/8 127.0.0.0/8Live Restore Enabled: false如何查看服務(wù)器證書有效期

以火狐瀏覽器為例

補(bǔ)充：Docker私有倉庫更換過期的自簽證書

更換Docker registry證書

拉取鏡像時(shí)報(bào)錯(cuò)如下：

k8s@master:~/shiyu$ docker pull reg.netlab.com/tensorflow-cpuUsing default tag: latestError response from daemon: Get https://reg.netlab.com/v2/: x509: certificate has expired or is not yet valid查詢/etc/docker/certs下的證書是否已過期

root@master:~# openssl x509 -in /etc/docker/certs.d/reg.netlab.com/reg.netlab.com.crt -noout -datesnotBefore=Apr 1 13:21:22 2019 GMTnotAfter=Mar 31 13:21:22 2020 GMT

顯然，該自簽證書在2020年3月31號(hào)已過期。

重新自簽新證書

創(chuàng)建~/certs文件夾存放key和密鑰

mkdir -p ~/certs

生成key

cd ~/certsopenssl genrsa -out reg.netlab.com.key 2048

生密鑰文件

openssl req -newkey rsa:4096 -nodes -sha256 -keyout reg.netlab.com.key -x509 -days 365 -out reg.netlab.com.crt

填寫相關(guān)信息

Country Name (2 letter code) [XX]:CN # 你的國家名稱State or Province Name (full name) []:guangdong# 省份Locality Name (eg, city) [Default City]:guagnzhou # 所在城市Organization Name (eg, company) [Default Company Ltd]:sysu# 組織名稱Organizational Unit Name (eg, section) []:netlab # 組織單元名稱Common Name (eg, your name or your server’s hostname) []:reg.netlab.com # 域名Email Address []:urmsone@163.com

至此，證書自簽完成。

將該證書添加到docker根證書中,重啟docker

注：由于是自簽名證書，默認(rèn)是不受Docker信任的，故而需要將證書添加到Docker的根證書中，Docker在CentOS 7/ubuntu 18中，證書存放路徑是/etc/docker/certs.d/域名：

添加證書到docker根證書中

mkdir -p /etc/docker/certs.d/reg.netlab.comcp ~/certs/reg.netlab.com.crt /etc/docker/certs.d/reg.netlab.com/

重啟Docker

systemctl restart docker

替換Docker registry容器中的過期證書

查看registry容器ID

k8s@master:~$ docker ps |grep registry3eb5eda4b75e registry.docker-cn.com/library/registry:2 '/entrypoint.sh /etc…' 13 months ago Up 44 minutes 0.0.0.0:443->5000/tcp registryb84ea71a572f f32a97de94e1'/entrypoint.sh /etc…' 13 months ago Up About an hour 0.0.0.0:5000->5000/tcp registry_mirror

根據(jù)ID查看rigstry的掛載路徑

k8s@master:~$ docker inspect 3eb5eda4b75e...'Binds': [ '/root/certs:/certs', '/home/registry:/var/lib/registry' ]...

將剛剛新生成的證書cp到/root/certs:/certs目錄下

root@master:~/certs# ll總用量 16drwxr-xr-x 2 root root 4096 Apr 1 2019 ./drwx------ 8 root root 4096 May 2 14:06 ../-rw-r--r-- 1 root root 2126 Apr 1 2019 reg.netlab.com.crt-rw------- 1 root root 3272 Apr 1 2019 reg.netlab.com.key

重啟registry容器

k8s@master:~$ systemctl restart docker

至此，自簽證書更新完畢！

測試

k8s@master:~/shiyu$ docker pull reg.netlab.com/tensorflow-cpuUsing default tag: latestlatest: Pulling from tensorflow-cpuDigest: sha256:68da50778a5f80e0676c4ca617299444fc71677a2d83cacccaf7a08d08cc1df6Status: Image is up to date for reg.netlab.com/tensorflow-cpu:latest

以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持好吧啦網(wǎng)。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教。