在CentOS 8上安装Docker CE
2019-11-26 13:51
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更新系统
# docker 官方还没8的yum源如果使用7的源安装也可以不过会有报错,当然可以忽略报错。这里使用二进制安装 # 开启PowerTools sed -i "s/enabled=0/enabled=1/" /etc/yum.repos.d/CentOS-PowerTools.repo dnf update -y dnf install -y lvm2 device-mapper-persistent-data dnf-utils # 关闭SELinux setenforce 0 sed -i 's/SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config
创建docker组
groupadd docker
下载docker二进制包
wget https://download.docker.com/linux/static/stable/x86_64/docker-19.03.5.tgz
解压二进制包
tar -xvf docker-19.03.5.tgz cp docker/* /usr/bin/
配置containerd
# 生成containerd 配置 mkdir -p /etc/containerd containerd config default >/etc/containerd/config.toml # 生成启动文件 cat > /usr/lib/systemd/system/containerd.service << EOF [Unit] Description=containerd container runtime Documentation=https://containerd.io After=network.target [Service] ExecStartPre=-/sbin/modprobe overlay ExecStart=/usr/bin/containerd KillMode=process Delegate=yes LimitNOFILE=1048576 # Having non-zero Limit*s causes performance problems due to accounting overhead # in the kernel. We recommend using cgroups to do container-local accounting. LimitNPROC=infinity LimitCORE=infinity TasksMax=infinity [Install] WantedBy=multi-user.target EOF
配置docker
# 创建docker 配置文件 mkdir /etc/docker cat > /etc/docker/daemon.json << EOF { "max-concurrent-downloads": 20, "data-root": "/apps/docker", "exec-root": "/apps/docker", "log-driver": "json-file", "bridge": "docker0", # 如果使用外部网络插件可以修改为"bridge": "none", "oom-score-adjust": -1000, "debug": false, "log-opts": { "max-size": "100M", "max-file": "10" }, "default-ulimits": { "nofile": { "Name": "nofile", "Hard": 1024000, "Soft": 1024000 }, "nproc": { "Name": "nproc", "Hard": 1024000, "Soft": 1024000 }, "core": { "Name": "core", "Hard": -1, "Soft": -1 } } } EOF # 创建docker sock 启动 cat > /usr/lib/systemd/system/docker.socket << EOF [Unit] Description=Docker Socket for the API PartOf=docker.service [Socket] ListenStream=/var/run/docker.sock SocketMode=0660 SocketUser=root SocketGroup=docker [Install] WantedBy=sockets.target EOF # 创建docker 启动文件 cat > /usr/lib/systemd/system/docker.service << EOF [Unit] Description=Docker Application Container Engine Documentation=https://docs.docker.com BindsTo=containerd.service After=network-online.target firewalld.service containerd.service Wants=network-online.target Requires=docker.socket [Service] Type=notify # the default is not to use systemd for cgroups because the delegate issues still # exists and systemd currently does not support the cgroup feature set required # for containers run by docker ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock ExecReload=/bin/kill -s HUP \$MAINPID TimeoutSec=0 RestartSec=2 Restart=always # Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229. # Both the old, and new location are accepted by systemd 229 and up, so using the old location # to make them work for either version of systemd. StartLimitBurst=3 # Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230. # Both the old, and new name are accepted by systemd 230 and up, so using the old name to make # this option work for either version of systemd. StartLimitInterval=60s # Having non-zero Limit*s causes performance problems due to accounting overhead # in the kernel. We recommend using cgroups to do container-local accounting. LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity # Comment TasksMax if your systemd version does not support it. # Only systemd 226 and above support this option. TasksMax=infinity # set delegate yes so that systemd does not reset the cgroups of docker containers Delegate=yes # kill only the docker process, not all processes in the cgroup KillMode=process [Install] WantedBy=multi-user.target EOF # 刷新systemd systemctl daemon-reload # 开机启动docker systemctl enable docker.service # 启动docker systemctl start docker.service
测试docker
# 查看docker及依赖插件状态 [root@localhost ~]# systemctl status containerd.service ● containerd.service - containerd container runtime Loaded: loaded (/usr/lib/systemd/system/containerd.service; disabled; vendor preset: disabled) Active: active (running) since Tue 2019-11-26 10:50:43 CST; 2h 50min ago Docs: https://containerd.io Main PID: 2659 (containerd) Tasks: 21 Memory: 21.4M CGroup: /system.slice/containerd.service └─2659 /usr/bin/containerd Nov 26 10:50:43 localhost.localdomain containerd[2659]: time="2019-11-26T10:50:43.449730600+08:00" level=info msg="Start snapshots syncer" Nov 26 10:50:43 localhost.localdomain containerd[2659]: time="2019-11-26T10:50:43.449755222+08:00" level=info msg="Start streaming server" [root@localhost ~]# systemctl status docker.socket ● docker.socket - Docker Socket for the API Loaded: loaded (/usr/lib/systemd/system/docker.socket; disabled; vendor preset: disabled) Active: active (running) since Tue 2019-11-26 10:50:43 CST; 2h 50min ago Listen: /var/run/docker.sock (Stream) Tasks: 0 (limit: 204655) Memory: 24.0K CGroup: /system.slice/docker.socket Nov 26 10:50:43 localhost.localdomain systemd[1]: Starting Docker Socket for the API. Nov 26 10:50:43 localhost.localdomain systemd[1]: Listening on Docker Socket for the API. [root@localhost ~]# systemctl status docker.service ● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled) Active: active (running) since Tue 2019-11-26 10:50:44 CST; 2h 50min ago Docs: https://docs.docker.com Main PID: 2660 (dockerd) Tasks: 24 Memory: 76.0M CGroup: /system.slice/docker.service └─2660 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock Nov 26 10:50:44 localhost.localdomain systemd[1]: Started Docker Application Container Engine. Nov 26 10:52:41 localhost.localdomain dockerd[2660]: time="2019-11-26T10:52:41.060293930+08:00" level=info msg="ignoring event" module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete" # 查看docker版本号 [root@localhost ~]# docker version Client: Docker Engine - Community Version: 19.03.5 API version: 1.40 Go version: go1.12.12 Git commit: 633a0ea838 Built: Wed Nov 13 07:22:05 2019 OS/Arch: linux/amd64 Experimental: false Server: Docker Engine - Community Engine: Version: 19.03.5 API version: 1.40 (minimum version 1.12) Go version: go1.12.12 Git commit: 633a0ea838 Built: Wed Nov 13 07:28:45 2019 OS/Arch: linux/amd64 Experimental: false containerd: Version: v1.2.10 GitCommit: b34a5c8af56e510852c35414db4c1f4fa6172339 runc: Version: 1.0.0-rc8+dev GitCommit: 3e425f80a8c931f88e6d94a8c831b9d5aa481657 docker-init: Version: 0.18.0 GitCommit: fec3683 # 查看docker info [root@localhost ~]# docker info Client: Debug Mode: false Server: Containers: 0 Running: 0 Paused: 0 Stopped: 0 Images: 2 Server Version: 19.03.5 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Native Overlay Diff: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: b34a5c8af56e510852c35414db4c1f4fa6172339 runc version: 3e425f80a8c931f88e6d94a8c831b9d5aa481657 init version: fec3683 Security Options: seccomp Profile: default Kernel Version: 4.18.0-80.11.2.el8_0.x86_64 Operating System: CentOS Linux 8 (Core) OSType: linux Architecture: x86_64 CPUs: 12 Total Memory: 31.25GiB Name: localhost.localdomain ID: BEN6:67IU:RIDY:42JB:T7AO:G465:OFBY:CLXV:AVWY:XIDG:SRJK:C2VZ Docker Root Dir: /apps/docker Debug Mode: false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 127.0.0.0/8 Live Restore Enabled: false Product License: Community Engine # 测试容器是否能成功启动 docker run --rm hello-world [root@localhost ~]# docker run --rm hello-world Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://hub.docker.com/ For more examples and ideas, visit: https://docs.docker.com/get-started/ # 测试网络是否联通 docker run --rm -ti juestnow/net-tools [root@localhost ~]# docker run --rm -ti juestnow/net-tools / # route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 172.17.0.1 0.0.0.0 UG 0 0 0 eth0 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 / # ping www.qq.com PING www.qq.com (14.18.175.154): 56 data bytes 64 bytes from 14.18.175.154: seq=0 ttl=52 time=13.685 ms 64 bytes from 14.18.175.154: seq=1 ttl=52 time=7.925 ms ^C --- www.qq.com ping statistics --- 2 packets transmitted, 2 packets received, 0% packet loss round-trip min/avg/max = 7.925/10.805/13.685 ms / # dig www.qq.com ; <<>> DiG 9.14.8 <<>> www.qq.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4470 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.qq.com. IN A ;; ANSWER SECTION: www.qq.com. 260 IN CNAME public.sparta.mig.tencent-cloud.net. public.sparta.mig.tencent-cloud.net. 152 IN A 113.96.232.215 ;; Query time: 10 msec ;; SERVER: 192.168.1.169#53(192.168.1.169) ;; WHEN: Tue Nov 26 05:43:57 UTC 2019 ;; MSG SIZE rcvd: 138 # 能正常上网
安装docker-compose
curl -L https://github.com/docker/compose/releases/download/1.25.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose chmod +x /usr/local/bin/docker-compose
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