docker version 显示docker的版本信息
docker info 显示docker的系统信息
docker 命令 --help
docker images 查看所有镜像
拉一个镜像centos来测试学习
docker pull centos
新建容器并启动
docker run [可选参数] image
--name ="name" 容器名字
-d 后台运行方式
-it 使用交互方式运行，进入容器查看内容
-p 指定容器的端口 -p 8080:8080
-p 主机端口：容器端口（常用）
-p 容器端口
-P 随机指定端口
docker run -it centos /bin/bash 进入centos容器并运行
ls 查看容器内的centos
exit 离开容器并退出
ctrl+P+Q 容器不停止退出
docker ps
空 查看正在运行的容器
-a 查看曾经运行过的所有容器
-n 显示最近创建的容器
-q 只显示容器的编号
删除容器:
docker rm 容器id 删除指定的容器，不能删除正在运行的容器 强制删除用 rm -f
docker rm -f $(docker ps -aq) 删除所有的容器
启动和停止容器的操作
docker start 容器id 启动容器
docker restart 容器id 重启容器
docker stop 容器id 停止当前正在运行的容器
docker kill 容器id 强制停止当前容器
常用的其他命令
docker run -d 镜像名 后台启动容器
问题docker ps ,发现centos 停止了
常见的坑，docker 容器使用后台运行，就必须要有一个前台进程，docker 发现没有应用，就会自动停止
nginx 容器启动后，发现自己没有提供业务，就会立即停止，就是没有进程了
查看日志
docker logs --help 查看日志命令
docker log -f -t --tail a763ba5cd6d6（容器🆔id）
自己编写一段shell脚本
docker run -d centos /bin/sh -c "while true;do echo wangdan;sleep 1;done"
docker ps
显示日志
--tf 显示日志
--tail number 要显示日志条数
docker logs -tf --tail 10 f45c89c5c8fc
查看容器的进程命令
docker top f45c89c5c8fc（容器🆔id）
查看容器所有信息
docker inspect 容器🆔id
[
{
"Id": "f45c89c5c8fc2f679fff872b8184382135744754393876121ade8678db106ca2",
"Created": "2021-12-03T03:46:20.95865763Z",
"Path": "/bin/sh",
"Args": [
"-c",
"while true;do echo wangdan;sleep 1;done"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 2112311,
"ExitCode": 0,
"Error": "",
"StartedAt": "2021-12-03T03:46:23.638493858Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6",
"ResolvConfPath": "/var/lib/docker/containers/f45c89c5c8fc2f679fff872b8184382135744754393876121ade8678db106ca2/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/f45c89c5c8fc2f679fff872b8184382135744754393876121ade8678db106ca2/hostname",
"HostsPath": "/var/lib/docker/containers/f45c89c5c8fc2f679fff872b8184382135744754393876121ade8678db106ca2/hosts",
"LogPath": "/var/lib/docker/containers/f45c89c5c8fc2f679fff872b8184382135744754393876121ade8678db106ca2/f45c89c5c8fc2f679fff872b8184382135744754393876121ade8678db106ca2-json.log",
"Name": "/silly_yalow",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "docker-default",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"CgroupnsMode": "host",
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "private",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": [],
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DeviceRequests": null,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": null,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"MaskedPaths": [
"/proc/asound",
"/proc/acpi",
"/proc/kcore",
"/proc/keys",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware"
],
"ReadonlyPaths": [
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger"
]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/e399fd6d96c5d41d0fadf93cca24ed075b0385af21f57a97c665ef6065e33e5b-init/diff:/var/lib/docker/overlay2/9424e33e99aecad4f34ee34a472baea9fe1141785c26b9b1d1a5fb346b8b99b6/diff",
"MergedDir": "/var/lib/docker/overlay2/e399fd6d96c5d41d0fadf93cca24ed075b0385af21f57a97c665ef6065e33e5b/merged",
"UpperDir": "/var/lib/docker/overlay2/e399fd6d96c5d41d0fadf93cca24ed075b0385af21f57a97c665ef6065e33e5b/diff",
"WorkDir": "/var/lib/docker/overlay2/e399fd6d96c5d41d0fadf93cca24ed075b0385af21f57a97c665ef6065e33e5b/work"
},
"Name": "overlay2"
},
"Mounts": [],
"Config": {
"Hostname": "f45c89c5c8fc",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/sh",
"-c",
"while true;do echo wangdan;sleep 1;done"
],
"Image": "centos",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20210915",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS"
}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "6116ae4390c9d1c9b478744462a83bade8f9eb3b028085827d7c80c739332755",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/6116ae4390c9",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "959898d7dbf834e597a70912956730ea283191fb46053d3e02ace080b8daa1fb",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:03",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "067114a8c117f65a3d1fedd4dbae4aedee1c40ff0393a904b0d54f41b95d5b9c",
"EndpointID": "959898d7dbf834e597a70912956730ea283191fb46053d3e02ace080b8daa1fb",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:03",
"DriverOpts": null
}
}
}
}
]
进入当前正在运行的容器：
我们通常都是使用后台方式运行的，需要进入容器，修改一些配置
命令
方式一：docker exec -it 容🆔id bashShell (docker exec -it f45c89c5c8fc /bin/bash) 进入容器后开启一个新的终端
方式二：docker attach 容器🆔id 进入容器正在执行的终端，不会启动新的进程
正在执行当前代码。。。
从容器内拷贝文件到主机上
docker cp 容器id:容器内路径 目的主机路径
拷贝是一个手动过程，未来我们使用 -V 卷的技术，可以实现，自动同步 /home
练习
练习一：在本机部署一个nginx
第一步 ：docker pull nginx
第二步： docker run -d --name nginx01 -p 3344:80 nginx（暴露端口80给外部）
第三步：docker exec -it nginx01 /bin/bash （执行nginx01这个容器）
练习二：在本级部署一个tomact
官方使用：docker run -it --rm tomact:9.0 一般用来测试，用完就删除
第一步 ：docker pull tomcat
第二步：docker run -d -p 3355:8080 --name tomcat01 tomcat
练习三：部署es+kibana（这里涉及到一个内存优化），es体积太大了！
doker stats 查看docker内存
docker run -d --name elasticsearch02 -p 9200:9200 -p 9300:9300 -e "discovery.type = single-node" -e
ES_JAVA_OPTS = "Xms64m -Xms512m" elasticsearch:7.6.2
镜像是什么？
Docker镜像加载原理
联合文件系统（分层，并且有公用的就不用再pull)
如何提交一个自己的镜像？（提交到本机）
commit镜像
docker commit 提交容器成为一个新的副本
命令和git原理类似
docker commit -m="提交的描述信息“ -a="作者” 容器id 目标镜像名：版本号
容器数据卷
容器的持久化和同步操作！容器间也是可以数据共享的
使用数据卷：
方式一：直接使用命令来挂载 -v
docker run -it -v 主机目录：容器内目录
docker run -it -v /home/ceshi:/home centos /bin/bash
启动起来后我们可以通过 docker inspect 容器id 去monuts这个里面查看对应关系
DockerFile
Docker网络
