因为工作原因需要使用Java调用装有docker环境的机器完成打镜像 上传镜像库的操作,进过调查,发现了两个比较常用的Java API工具,分别是 docker-java 和 spotify-docker-client,Github地址分别如下:
docker-java:https://github.com/docker-java/docker-java
spotify-docker-client:https://github.com/spotify/docker-client
两者做个简单的对比:
Star/Fork(2018/12/19) | 文档丰富度 | API功能覆盖度 | 使用复杂度 | |
docker-java | 1188/638 | 相对完善 | 基本功能 | 简单 |
spotify-docker-client | 1101/450 | 相对完善 | 功能实现较多 | 相对复杂 |
1.升级docker版本(可选)
#删除旧的版本的docker
yum remove docker docker-common docker-selinux docker-engine
yum erase docker docker-common docker-client docker-compose
#设置docker yum源
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
#update
yum update
#要先安装docker-ce-selinux-17.03.2.ce,否则安装docker-ce会报错
yum install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch.rpm
#以查看所有仓库中所有docker版本,并选择特定版本安装
yum list docker-ce --showduplicates | sort -r
#由于repo中默认只开启stable仓库,故这里安装的是最新稳18.03.0.ce-1.el7.centos
yum install docker-ce
#安装指定的版本 例如: yum install docker-ce-17.12.0.ce-1.el7.centos
sudo yum install <FQPN>
#启动
systemctl start docker
#查看版本
docker version
2. 开启docker远程访问
默认情况下,Docker守护进程Unix socket(/var/run/docker.sock)来进行本地进程通信,而不会监听任何端口,因此只能在本地使用docker客户端或者使用Docker API进行操作。如果想在其他主机上操作Docker主机,就需要让Docker守护进程打开一个HTTP Socket,这样才能实现远程通信。
方法一:
vi /lib/systemd/system/docker.service
找到Execstart=/usr/bin/dockerd后加上-H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock 退出并且保存
方法二:
Centos 7.X docker-ce:
修改/etc/sysconfig/docker文件,在最后增加一行DOCKER_OPTS
# docker-latest daemon can be used by starting the docker-latest unitfile.
# To use docker-latest client, uncomment below lines
#DOCKERBINARY=/usr/bin/docker-latest
#DOCKERDBINARY=/usr/bin/dockerd-latest
#DOCKER_CONTAINERD_BINARY=/usr/bin/docker-containerd-latest
#DOCKER_CONTAINERD_SHIM_BINARY=/usr/bin/docker-containerd-shim-latest
DOCKER_OPTS="-H unix:///var/run/docker.sock -H 0.0.0.0:2375"
方法一二都需要使配置生效:
#docker.service changed on disk. Run 'systemctl daemon-reload' to reload units.
systemctl daemon-reload
systemctl restart docker.service
Centos 6.x docker 1.X.X
$ sudo vi /etc/sysconfig/docker
other_args="-H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock"
$ sudo service docker restart
# centos docker的其它操作方式
$ sudo service docker start
$ sudo service docker stop
$ /bin/systemctl start docker.service
3.引入spotify-docker-client依赖(以标准maven工程为例)
错误分析:
1.systemctl start docker 报错,内容:
Dec 19 19:13:09 VM_0_4_centos dockerd[13361]: time="2018-12-19T19:13:09.334930508+08:00" level=warning msg="[!] DON'T BIND ON ANY IP ADDRESS WITHOUT setting -tlsverify IF YOU DON'T KNOW WHA
Dec 19 19:13:09 VM_0_4_centos dockerd[13361]: time="2018-12-19T19:13:09.339318789+08:00" level=info msg="libcontainerd: new containerd process, pid: 13364"
Dec 19 19:13:10 VM_0_4_centos dockerd[13361]: time="2018-12-19T19:13:10.343022632+08:00" level=error msg="[graphdriver] prior storage driver overlay2 failed: driver not supported"
Dec 19 19:13:10 VM_0_4_centos dockerd[13361]: Error starting daemon: error initializing graphdriver: driver not supported
Dec 19 19:13:10 VM_0_4_centos systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
Dec 19 19:13:10 VM_0_4_centos systemd[1]: Failed to start Docker Application Container Engine.
-- Subject: Unit docker.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit docker.service has failed.
--
-- The result is failed.
原因:/var/lib/docker 目录有旧的container 文件,版本变更后需要删除
解决办法:
mv /var/lib/docker /var/lib/docker.old
service docker start
rm -rf /var/lib/docker.old
来源:oschina
链接:https://my.oschina.net/u/2420680/blog/2990496