1、地址

视频地址：https://www.bilibili.com/video/BV1og4y1q7M4?p=6

帮助文档：https://docs.docker.com/

万能命令【帮助命令】

docker run --help

2、只显示镜像ID

docker images -q

3、搜索下载镜像

docker search mysql

docker pull mysql

4、docker的递归命令

docker rmi -f $(docker images eurka -q)

5、docker容器命令可选项

docker run [ 可选] image

--name 指定容器名字

-d 后台方式运行

-it 使用交互方式运行，进入容器查看内容

-P 指定容器端口

连带执行命令

docker run -d centos /bin/bash -c "echo 'asdf' "

6、docker ps

docker ps 【可选参数】

默认展示正在运行的容器

-a #展示所有容器

-n #只展示最新几条容器

-q #只显示容器ID

7、常用其他命令

后台启动容器

[root@localhohst /]# docker run -d centos

#问题 docker ps 发现容器停止了
#常见坑，docker容器使用后台运行，必须要有一个前台进程，否则，docker发现没有应用的话，就会自动停止

查看日志

docker logs -tf --tail 10 容器

查看进程

docker top 容器ID

查看详细信息

docker inspect 容器ID


    {
        "Id": "bab2479b83420648b0ef2901d40deb2cc953da17e9a9eba736ec054f8838999e",
        "Created": "2021-09-21T00:01:34.670128694Z",
        "Path": "bash",
        "Args": [],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 17619,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2021-09-21T00:01:34.855574355Z",
            "FinishedAt": "0001-01-01T00:00:00Z"
        },
        "Image": "sha256:219665e0dcb6139dc835be1859467cbb543d1b51759abe7317c1e0a7c3ce76de",
        "ResolvConfPath": "/var/lib/docker/containers/bab2479b83420648b0ef2901d40deb2cc953da17e9a9eba736ec054f8838999e/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/bab2479b83420648b0ef2901d40deb2cc953da17e9a9eba736ec054f8838999e/hostname",
        "HostsPath": "/var/lib/docker/containers/bab2479b83420648b0ef2901d40deb2cc953da17e9a9eba736ec054f8838999e/hosts",
        "LogPath": "/var/lib/docker/containers/bab2479b83420648b0ef2901d40deb2cc953da17e9a9eba736ec054f8838999e/bab2479b83420648b0ef2901d40deb2cc953da17e9a9eba736ec054f8838999e-json.log",
        "Name": "/eureka",
        "RestartCount": 0,
        "Driver": "overlay2",
        "Platform": "linux",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": null,
            "ContainerIDFile": "",
            "LogConfig": {
                "Type": "json-file",
                "Config": {}
            },
            "NetworkMode": "default",
            "PortBindings": {
                "8383/tcp": [
                    {
                        "HostIp": "",
                        "HostPort": "8383"
                    }
                ]
            },
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
            "AutoRemove": false,
            "VolumeDriver": "",
            "VolumesFrom": null,
            "CapAdd": null,
            "CapDrop": null,
            "Dns": [],
            "DnsOptions": [],
            "DnsSearch": [],
            "ExtraHosts": null,
            "GroupAdd": null,
            "IpcMode": "shareable",
            "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,
            "DiskQuota": 0,
            "KernelMemory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": null,
            "OomKillDisable": false,
            "PidsLimit": 0,
            "Ulimits": null,
            "CpuCount": 0,
            "CpuPercent": 0,
            "IOMaximumIOps": 0,
            "IOMaximumBandwidth": 0,
            "MaskedPaths": [
                "/proc/acpi",
                "/proc/kcore",
                "/proc/keys",
                "/proc/latency_stats",
                "/proc/timer_list",
                "/proc/timer_stats",
                "/proc/sched_debug",
                "/proc/scsi",
                "/sys/firmware"
            ],
            "ReadonlyPaths": [
                "/proc/asound",
                "/proc/bus",
                "/proc/fs",
                "/proc/irq",
                "/proc/sys",
                "/proc/sysrq-trigger"
            ]
        },
        "GraphDriver": {
            "Data": {
                "LowerDir": "/var/lib/docker/overlay2/4f6acc679a64226007a906eb8eda0b9e770ecf62eb54ab4139d6baef66d7dc60-init/diff:/var/lib/docker/overlay2/8b6dea114bad4652e3a6d698a262f6c0ab578e7d91a6bdf8fe6d49991deb0489/diff:/var/lib/docker/overlay2/3e4a7cd8f878516890e5b9b589965e1babffa2fc9ef5509ef8a376bdc59e0692/diff:/var/lib/docker/overlay2/ffced512403b7695132a855cce965134b6980f514216d0d354149f667eaadb5d/diff:/var/lib/docker/overlay2/0eca75e1d717b5a6d8e16b6c53d75d90bebccb3582da40a865f8a7a1c7ead03c/diff:/var/lib/docker/overlay2/3f0666a3c8bd188c5f3d3bf8d56580e51fb57c16a4cdbc2a1ea12001afedc239/diff:/var/lib/docker/overlay2/9200f17507186c50508ac30e216189069da7547a4142144ac05c0cd511adf2ea/diff:/var/lib/docker/overlay2/043f4485df9066a13d5fa76a4cc60893a9ce330ae58b1f8a4ae3984ab21266b0/diff:/var/lib/docker/overlay2/bb3cf3b35db0498c4e36f401fea22bed581ad147012ea2490752aa182e091820/diff:/var/lib/docker/overlay2/6e776137a76b96e1d81f07121a4e31cef9f4fa5b7a40e678c16551ee9f0cb439/diff",
                "MergedDir": "/var/lib/docker/overlay2/4f6acc679a64226007a906eb8eda0b9e770ecf62eb54ab4139d6baef66d7dc60/merged",
                "UpperDir": "/var/lib/docker/overlay2/4f6acc679a64226007a906eb8eda0b9e770ecf62eb54ab4139d6baef66d7dc60/diff",
                "WorkDir": "/var/lib/docker/overlay2/4f6acc679a64226007a906eb8eda0b9e770ecf62eb54ab4139d6baef66d7dc60/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [],
        "Config": {
            "Hostname": "bab2479b8342",
            "Domainname": "",
            "User": "",
            "AttachStdin": true,
            "AttachStdout": true,
            "AttachStderr": true,
            "ExposedPorts": {
                "8383/tcp": {}
            },
            "Tty": true,
            "OpenStdin": true,
            "StdinOnce": true,
            "Env": [
                "PATH=/usr/local/openjdk-8/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "JAVA_HOME=/usr/local/openjdk-8",
                "LANG=C.UTF-8",
                "JAVA_VERSION=8u302"
            ],
            "Cmd": [
                "bash"
            ],
            "Image": "eureka:v1",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {}
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "fa978429fff48fbd2c36b66940c80c99f18904a6dbae921951c2f7b7e37c0f38",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {
                "8383/tcp": [
                    {
                        "HostIp": "0.0.0.0",
                        "HostPort": "8383"
                    }
                ]
            },
            "SandboxKey": "/var/run/docker/netns/fa978429fff4",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "b299bf407ee38cd81ee144b8dfa764c1b8f6603abfc7dc26566cd7715cbdb33b",
            "Gateway": "172.17.0.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "172.17.0.2",
            "IPPrefixLen": 16,
            "IPv6Gateway": "",
            "MacAddress": "02:42:ac:11:00:02",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "82943f3f2dafdf213c76e9e876e7ed071d84a8a453565980ad7811958bb0f4b6",
                    "EndpointID": "b299bf407ee38cd81ee144b8dfa764c1b8f6603abfc7dc26566cd7715cbdb33b",
                    "Gateway": "172.17.0.1",
                    "IPAddress": "172.17.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:11:00:02",
                    "DriverOpts": null
                }
            }
        }
    }
]

进入正在运行的容器

#重新开一个终端
docker exec -it 容器ID /bin/bash
#进入正在运行的终端
docker attach 容器ID

数据迁移

容器==>宿主机

docker cp bab2479b8342:/home/test.java /home

小结

P14 作业一：部署Nginx

1、搜索镜像 search

2、下载镜像 pull

3、运行测试 run

4、后台运行 -d

5、给容器命名--name

6、开放映射指定端口 -p 外部端口：内部端口

7、进入容器查看日志

P15 部署tomcat

1、官方的使用方式

docker run -it --rm tomcat:9.0

--rm: 停止就会自动删除，可用于临时测试

2、拉取镜像docker pull tomcat

3、docker run -d -p 3355:8080 --name tomcat01 tomcat

4、进入容器 docker exec -it tomcat01 /bin/bash

P16 部署ES+KIBANA

问题：

ES要求暴露端口非常多

ES非常耗内存

ES的数据一般需要放置到安全目录

1、官方命令：启动ES[后面的tag版本号是必要的，否则会报错]

docker run -d --name elasticsearch --net somenetwork -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.14.1

--net somenetwork 网络配置

启动ES以后，因为ES非常消耗内存

查看状态：docker stats

2、检查是否安装成功

curl localhost:9200

3、通过-E增加配置来减少内存消耗

docker run -d --name ES --net somenetwork -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms64m -Xmx512m" elasticsearch:7.14.1

可视化

portainer

docker run -d -p 8088:9000 --restart=always -v /var/run/docker.sock:/var/run/docker.sock --privileged=true portainer/portainer

rancher(CICD)

portainer

一、什么是portainer？

Docker图形化管理界面工具，提供一个后台面板以供使用

docker run -d -p 8088:9000 --restart=always -v /var/run/docker.sock:/var/run/docker.sock --privileged=true portainer/portainer

二、测试安装

访问：localhost:8088 [docker run的时候指定了外部映射端口]

三、继续

设置完密码，只要选择local模式即可

彻底进入之前会有确认提示：【在docker run的时候就已经设置了卷挂载】

Ensure that you have started the Portainer container with the following Docker flag:

-v "/var/run/docker.sock:/var/run/docker.sock" (Linux).

P18 P19全是原理，分层堆叠镜像的原理与联合文件系统的简介

镜像层与容器层也是一样的原理，堆叠而成

P20提交镜像【需实战，解决JDK报错问题】

docker commit命令：用于将修改后的容器提交成为新的镜像

docker commit -a="kunags" -m="add webapps app" 容器ID 镜像名称

docker commit -a="dengliang" -m ="test first docker commit" 5d18223548b0 test_first_commit:v1

OPTIONS说明：

• -a :提交的镜像作者；

• -c :使用Dockerfile指令来创建镜像；

• -m :提交时的说明文字；

• -p :在commit时，将容器暂停。

1、先关掉之前的

docker stop $(docker ps -aqf "name=eureka")

docker rm eureka

2、启动新的

docker run -d --name=test02 -p 8383:8383 test_first_commit:v1

3、进入查看

docker exec -it $(docker ps -aqf "name=test02") /bin/bash

容器数据卷技术

使用数据卷

方式一  直接使用命令挂载 -v

docker run -it -v 主机目录:容器目录
docker run -it -v /home/ceshi:/home/inner

实际使用：
docker run -d --name=eureka -p 8383:8383 -v /home/dengliang/autoDeploy/main_java:/home/main_java eureka:v1

安装Mysql

1、拉取镜像

docker pull mysql:5.7

2、镜像装进容器运行

设置名称、端口映射、数据卷、密码配置以及后台配置

docker run -d --name=mysql -p 3306:3306  -v /home/dengliang/docker/mysql/conf:/etc/mysql/conf.d -v /home/dengliang/docker/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=88888888 mysql:5.7

3、安装phpmyadmin进行数据库链接[废弃，大概率要在说完网络之后才能真正从一个容器访问另外一个容器]

$ docker pull phpmyadmin:5.1

#然后配置启动

$ docker run --name myadmin -d -e PMA_HOST=localhost -e PMA_PORT=3306 -p 8180:80 -v /home/dengliang/phpmyadmin/config.user.inc.php:/etc/phpmyadmin/config.user.inc.php -v /home/dengliang/phpmyadmin/sessions:/sessions -v /home/dengliang/phpmyadmin//www/themes:/www/themes phpmyadmin


$ docker run --name myadmin -d --link mysql:db -e PMA_HOST=localhost -e PMA_PORT=3306 -p 8180:80 
-v /home/dengliang/phpmyadmin/config.user.inc.php:/etc/phpmyadmin/config.user.inc.php -v /home/dengliang/phpmyadmin/sessions:/sessions -v /home/dengliang/phpmyadmin/www/themes:/www/themes phpmyadmin:5.1


#网络用docker network ls来查看
#一共 bridge  host  none  somenetwork四种
$ docker run --name myadmin -d --link mysql:db -p 8180:80 –net single_default -v /home/dengliang/phpmyadmin/config.user.inc.php:/etc/phpmyadmin/config.user.inc.php -v /home/dengliang/phpmyadmin/sessions:/sessions -v /home/dengliang/phpmyadmin/www/themes:/www/themes phpmyadmin:5.1

3、利用另外一台电脑链接3306查看数据库