docker的学习

docker

检测docker版本

`docker - version`
fs-user@fs-user-PC:~$ docker -v
Docker version 19.03.8, build 1b4342cd4c

拉取镜像出现的问题

root@root-PC:~$ sudo docker pull openjdk:8
8: Pulling from library/openjdk
001c52e26ad5: Pulling fs layer 
d9d4b9b6e964: Pulling fs layer 
2068746827ec: Pulling fs layer 
9daef329d350: Waiting 
d85151f15b66: Waiting 
52a8c426d30b: Waiting 
8754a66e0050: Waiting 
error pulling image configuration: Get "https://production.cloudflare.docker.com/registry-v2/docker/registry/v2/blobs/sha256/b2/b273004037cc3af245d8e08cfbfa672b93ee7dcb289736c82d0b58936fb71702/data?verify=1679455442-zqLn%2BvizTb9PKB15ESEGJPvcqos%3D": net/http: TLS handshake timeout

解决:

原因:使用docker拉取镜像失败。
解决方法:在/etc/resolv.conf文件中新增一个参数

nameserver 8.8.8.8

保存,重启docker

service docker redtart

重新拉取镜像。

如果还是不行,那就是公司网络禁用了,可以连自己手机网尝试

查看docker是否拉取成功

root@root-PC:/etc$ sudo docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              904b8cb13b93        2 weeks ago         142MB
openjdk             8                   b273004037cc        7 months ago        526MB

删除镜像

使用 docker rmi命令即可删除指定镜像,强制删除加 -f

docker rmi java

删除所有镜像

docker rmi $(docker images -q)

新建并启动容器

使用以下docker run命令即可新建并启动一个容器,该命令是最常用的命令,它有很多选项,下面将列举一些常用的选项。

-d选项:表示后台运行

-P选项:随机端口映射

-p选项:指定端口映射,有以下四种格式。

– ip:hostPort:containerPort

– ip::containerPort

– hostPort:containerPort

– containerPort

–net选项:指定网络模式,该选项有以下可选参数:

–net=bridge:默认选项,表示连接到默认的网桥。

–net=host:容器使用宿主机的网络。

–net=container:NAME-or-ID:告诉 Docker让新建的容器使用已有容器的网络配置。

–net=none:不配置该容器的网络,用户可自定义网络配置。

1、运行容器

sudo docker run -d -p 91:80 nginx

fs-user@fs-user-PC:/etc$ sudo docker run -d -p 91:80 nginx
b644707b5f9616eb42291a0dd8dcc40549bf24964486693c837559554bb077a4

这样就能启动一个 Nginx容器。在本例中,为 docker run添加了两个参数,含义如下:

-d 后台运行

-p 宿主机端口:容器端口 #开放容器端口到宿主机端口

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-YFHFGvyM-1679535258324)(/home/fs-user/.config/Typora/typora-user-images/image-20230322111235693.png)]

2、列出容器

sudo docker ps

fs-user@fs-user-PC:/etc$ sudo docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS              PORTS                NAMES
b644707b5f96        nginx               "/docker-entrypoint.…"   About a minute ago   Up About a minute   0.0.0.0:91->80/tcp   gallant_dubinsky

3、停止容器

sudo docker stop b644707b5f96

fs-user@fs-user-PC:/etc$ sudo docker stop b644707b5f96
b644707b5f96

4、强制停止容器

sudo docker kill 39b85cd1ab22

fs-user@fs-user-PC:/etc$ sudo docker kill 39b85cd1ab22

5、启动已停止的容器

 sudo docker start b644707b5f96

fs-user@fs-user-PC:/etc$ sudo docker start b644707b5f96
b644707b5f96

6、查看容器所有信息

sudo docker inspect b644707b5f96

fs-user@fs-user-PC:/etc$ sudo docker inspect b644707b5f96
[
    {
        "Id": "b644707b5f9616eb42291a0dd8dcc40549bf24964486693c837559554bb077a4",
        "Created": "2023-03-22T03:12:17.429285446Z",
        "Path": "/docker-entrypoint.sh",
        "Args": [
            "nginx",
            "-g",
            "daemon off;"
        ],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 37395,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2023-03-22T03:16:47.76452428Z",
            "FinishedAt": "2023-03-22T03:14:57.806904696Z"
        },
        "Image": "sha256:904b8cb13b932e23230836850610fa45dce9eb0650d5618c2b1487c2a4f577b8",
        "ResolvConfPath": "/var/lib/docker/containers/b644707b5f9616eb42291a0dd8dcc40549bf24964486693c837559554bb077a4/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/b644707b5f9616eb42291a0dd8dcc40549bf24964486693c837559554bb077a4/hostname",
        "HostsPath": "/var/lib/docker/containers/b644707b5f9616eb42291a0dd8dcc40549bf24964486693c837559554bb077a4/hosts",
        "LogPath": "/var/lib/docker/containers/b644707b5f9616eb42291a0dd8dcc40549bf24964486693c837559554bb077a4/b644707b5f9616eb42291a0dd8dcc40549bf24964486693c837559554bb077a4-json.log",
        "Name": "/gallant_dubinsky",
        "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": {
                "80/tcp": [
                    {
                        "HostIp": "",
                        "HostPort": "91"
                    }
                ]
            },
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
            "AutoRemove": false,
            "VolumeDriver": "",
            "VolumesFrom": null,
            "CapAdd": null,
            "CapDrop": null,
            "Capabilities": null,
            "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/overlay2/52cb2ff553520cd7597f347c48d68c3e3f165915b1851377e2673f058371f692-init/diff:/var/lib/docker/overlay2/bfb72da2f128a1409e9a787e3cfeaf88c8df98f1780fba07ea6773fec9cc0f2e/diff:/var/lib/docker/overlay2/4b9564de37ed2c242756ac01529a8009a946819fcd7c8be6ae2440fff6ae079c/diff:/var/lib/docker/overlay2/da6d7f613906f4eaee23afabb53c77d31f85cdee80891f65fb62b14740aaa45c/diff:/var/lib/docker/overlay2/f507ac876b5852ce44371d0d82f404e9696e7b08787433737e3d3fcdca4ed2a3/diff:/var/lib/docker/overlay2/4689ce17a70d63660c0ef3f065d890ead7e30484f9779013121786db9a51edde/diff:/var/lib/docker/overlay2/a5be3373ff3e01fb41fcd1adedd7ed0d77aac4e3ee4df848976d488eb9cbcb20/diff",
                "MergedDir": "/var/lib/docker/overlay2/52cb2ff553520cd7597f347c48d68c3e3f165915b1851377e2673f058371f692/merged",
                "UpperDir": "/var/lib/docker/overlay2/52cb2ff553520cd7597f347c48d68c3e3f165915b1851377e2673f058371f692/diff",
                "WorkDir": "/var/lib/docker/overlay2/52cb2ff553520cd7597f347c48d68c3e3f165915b1851377e2673f058371f692/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [],
        "Config": {
            "Hostname": "b644707b5f96",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "ExposedPorts": {
                "80/tcp": {}
            },
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "NGINX_VERSION=1.23.3",
                "NJS_VERSION=0.7.9",
                "PKG_RELEASE=1~bullseye"
            ],
            "Cmd": [
                "nginx",
                "-g",
                "daemon off;"
            ],
            "Image": "nginx",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": [
                "/docker-entrypoint.sh"
            ],
            "OnBuild": null,
            "Labels": {
                "maintainer": "NGINX Docker Maintainers "
            },
            "StopSignal": "SIGQUIT"
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "87c486b8a2e42155d6cc36288f2cd51dd1b52287cfb94cb29e82ba3d8f4a6bc1",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {
                "80/tcp": [
                    {
                        "HostIp": "0.0.0.0",
                        "HostPort": "91"
                    }
                ]
            },
            "SandboxKey": "/var/run/docker/netns/87c486b8a2e4",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "2d0a3b3bd1b9751a2b7d4190bf369e1ca8e660ac1072524341a2e86ea4bd42f4",
            "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": "cf25ae835549ce48dcbe36fc6c9db2df3d5a2349abc1e6621fc0cbf48b20407c",
                    "EndpointID": "2d0a3b3bd1b9751a2b7d4190bf369e1ca8e660ac1072524341a2e86ea4bd42f4",
                    "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
                }
            }
        }
    }
]

7、查看容器日志

sudo docker container logs b644707b5f96

8、查看容器里的进程

sudo docker top b644707b5f96

fs-user@fs-user-PC:/etc$ sudo docker top b644707b5f96
UID                 PID                 PPID                C                   STIME               TTY                 TIME                CMD
root                37395               37376               0                   11:16               ?                   00:00:00            nginx: master process nginx -g daemon off;
systemd+            37439               37395               0                   11:16               ?                   00:00:00            nginx: worker process
systemd+            37440               37395               0                   11:16               ?                   00:00:00            nginx: worker process
systemd+            37441               37395               0                   11:16               ?                   00:00:00            nginx: worker process
systemd+            37442               37395               0                   11:16               ?                   00:00:00            nginx: worker process
systemd+            37443               37395               0                   11:16               ?                   00:00:00            nginx: worker process
systemd+            37444               37395               0                   11:16               ?                   00:00:00            nginx: worker process
systemd+            37445               37395               0                   11:16               ?                   00:00:00            nginx: worker process
systemd+            37446               37395               0                   11:16               ?                   00:00:00            nginx: worker process

9、容器与宿主机相互复制文件

  • 从容器里面拷文件到宿主机:

    docker cp 容器id:要拷贝的文件在容器里面的路径 宿主机的相应路径
    
  • 从宿主机拷文件到容器里面:

docker cp 要拷贝的宿主机文件路径 容器id:要拷贝到容器里面对应的路径

10、进入容器

使用docker exec命令用于进入一个正在运行的docker容器。如果docker run命令运行容器的时候,没有使用-it参数,就要用这个命令进入容器。一旦进入了容器,就可以在容器的 Shell 执行命令了

11、容器内安装vim、ping、ifconfig等指令

apt-get update apt-get install vim #安装vim
apt-get install iputils-ping #安装ping 
apt-get install net-tools #安装ifconfig
docker exec -it f0b1c8ab3633 /bin/bash (有的容器需要把 /bin/bash 换成 sh)

12、删除容器

使用 docker rm命令即可删除指定容器

docker rm f0b1c8ab3633

该命令只能删除已停止的容器,如需删除正在运行的容器,可使用-f参数

强制删除所有容器

docker rm -f $(docker ps -a -q)

13、将文件移动到docker中

sudo docker cp ~/Desktop/cmgde2eas-sr-rs.jar  b644707b5f96:/usr/share/

14、 查看容器中文件

sudo docker exec b644707b5f96 ls -al

fs-user@fs-user-PC:~/Desktop$ sudo docker exec b644707b5f96 ls -al
total 92
drwxr-xr-x   1 root root 4096 Mar 22 04:24 .
drwxr-xr-x   1 root root 4096 Mar 22 04:24 ..
-rwxr-xr-x   1 root root    0 Mar 22 03:12 .dockerenv
drwxr-xr-x   2 root root 4096 Feb 27 00:00 bin
drwxr-xr-x   2 root root 4096 Dec  9 19:15 boot
drwxr-xr-x   5 root root  340 Mar 22 03:16 dev
drwxr-xr-x   1 root root 4096 Mar  1 18:43 docker-entrypoint.d
-rwxrwxr-x   1 root root 1616 Mar  1 18:42 docker-entrypoint.sh
drwxr-xr-x   1 root root 4096 Mar 22 03:12 etc
drwxr-xr-x   2 root root 4096 Dec  9 19:15 home
drwxr-xr-x   1 root root 4096 Feb 27 00:00 lib
drwxr-xr-x   2 root root 4096 Feb 27 00:00 lib64
drwxr-xr-x   2 root root 4096 Feb 27 00:00 media
drwxr-xr-x   2 root root 4096 Feb 27 00:00 mnt
drwxr-xr-x   2 root root 4096 Feb 27 00:00 opt
dr-xr-xr-x 474 root root    0 Mar 22 03:16 proc
drwx------   2 root root 4096 Feb 27 00:00 root
drwxr-xr-x   1 root root 4096 Mar 22 03:16 run
drwxr-xr-x   2 root root 4096 Feb 27 00:00 sbin
drwxr-xr-x   2 root root 4096 Feb 27 00:00 srv
dr-xr-xr-x  13 root root    0 Mar 22 03:16 sys
drwxrwxrwt   1 root root 4096 Mar  1 18:43 tmp
drwxr-xr-x   1 root root 4096 Feb 27 00:00 usr
drwxr-xr-x   1 root root 4096 Feb 27 00:00 var
sudo docker exec b644707b5f96 ls -al /usr/share

fs-user@fs-user-PC:~/Desktop$ sudo docker exec b644707b5f96 ls -al /usr/share
total 98644
drwxr-xr-x  1 root root      4096 Mar 22 04:24 .
drwxr-xr-x  1 root root      4096 Feb 27 00:00 ..
drwxr-xr-x  3 root root      4096 Mar  1 18:43 X11
drwxr-xr-x  2 root root      4096 Feb 27 00:00 adduser
drwxr-xr-x  2 root root      4096 Feb 27 00:00 base-files
drwxr-xr-x  2 root root      4096 Feb 27 00:00 base-passwd
drwxr-xr-x  3 root root      4096 Jun 10  2021 bash-completion
drwxr-xr-x  1 root root      4096 Mar  1 18:43 bug
drwxr-xr-x  3 root root      4096 Mar  1 18:42 ca-certificates
-rw-r--r--  1 1000 1000 100820645 Mar 22 03:37 cmgde2eas-sr-rs.jar

15、创建容器中文件

16、docker部署springboot

编写 Dockerfile

在 Spring Boot 项目的根目录下创建一个 Dockerfile 文件,内容如下:

# Docker image for springboot file run
# VERSION 0.0.1
# Author: 
# 基础镜像使用java
FROM openjdk:8
# 作者
MAINTAINER ycz
# VOLUME 指定了临时文件目录为/tmp。
# 其效果是在主机 /var/lib/docker 目录下创建了一个临时文件,并链接到容器的/tmp
VOLUME /tmp 
# 将jar包添加到容器中并更名为xx.jar
ENV LANG=en_US.UTF-8
ENV LC_CTYPE="en_US.UTF-8"
ENV LC_NUMERIC="en_US.UTF-8"
ENV LC_TIME="en_US.UTF-8"
ENV LC_COLLATE="en_US.UTF-8"
ENV LC_MONETARY="en_US.UTF-8"
ENV LC_MESSAGES="en_US.UTF-8"
ENV LC_PAPER="en_US.UTF-8"
ENV LC_NAME="en_US.UTF-8"
ENV LC_ADDRESS="en_US.UTF-8"
ENV LC_TELEPHONE="en_US.UTF-8"
ENV LC_MEASUREMENT="en_US.UTF-8"
ENV LC_IDENTIFICATION="en_US.UTF-8"

ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime \
    && echo $TZ > /etc/timezone


ADD cmgde2eas-sr-rs.jar cmgde2eas-sr-rs.jar
# 运行jar包
RUN bash -c 'touch /cmgde2eas-sr-rs.jar'
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/cmgde2eas-sr-rs.jar"]

构建 Docker 镜像

在命令行中进入到 Dockerfile 所在目录,执行以下命令构建 Docker 镜像:

sudo docker build . -t test-demo:v1.0

运行 Docker 容器

执行以下命令,运行 Docker 容器:

sudo docker run -d -p 8080:8080 --name test-demo test-demo:v1.0 

查看日志

sudo docker logs -f --tail=1000 test-demo

停止正在运行的容器

sudo docker stop test-demo

开始容器

sudo docker start test-demo

删除容器

fs-user@fs-user-PC:~$  sudo docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                       PORTS               NAMES
b1fdceb13212        test-demo:v1.0      "java -Djava.securit…"   13 minutes ago      Exited (143) 5 minutes ago                       test-demo
b644707b5f96        nginx               "/docker-entrypoint.…"   4 hours ago         Exited (0) 4 minutes ago                         gallant_dubinsky
fs-user@fs-user-PC:~$ sudo docker rm b1fdceb13212  
b1fdceb13212
fs-user@fs-user-PC:~$ sudo docker rm b644707b5f96
b644707b5f96

列出所有容器(包括停止了)

fs-user@fs-user-PC:~/Desktop/springboot$ sudo docker ps 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                NAMES
b644707b5f96        nginx               "/docker-entrypoint.…"   4 hours ago         Up 4 hours          0.0.0.0:91->80/tcp   gallant_dubinsky
fs-user@fs-user-PC:~/Desktop/springboot$ sudo docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                        PORTS                NAMES
b1fdceb13212        test-demo:v1.0      "java -Djava.securit…"   8 minutes ago       Exited (143) 21 seconds ago                        test-demo
b644707b5f96        nginx               "/docker-entrypoint.…"   4 hours ago         Up 4 hours                    0.0.0.0:91->80/tcp   gallant_dubinsky

删除镜像

sudo docker image

sudo docker rmi 3671947e3fc1


fs-user@fs-user-PC:~$ sudo docker images

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
test-demo           v1.0                3671947e3fc1        24 minutes ago      728MB
nginx               latest              904b8cb13b93        2 weeks ago         142MB
openjdk             8                   b273004037cc        7 months ago        526MB
fs-user@fs-user-PC:~$ sudo docker rmi 3671947e3fc1

Untagged: test-demo:v1.0
Deleted: sha256:3671947e3fc1e0dc5734e4bede48a91392c9210f38b473d4f6af6a9ef506a65f
Deleted: sha256:46ddcfd85d90801a4e964365a335660b51274cf7806ad404ae0cbe007efd02dc
Deleted: sha256:85937548756fb08d9e5d0aa6a3f365a8572a2254487177887d16a5d3a3fc950e
Deleted: sha256:d6d8176c1deca00677af08cd35c98f86a6d30671ea89e956f929f8b4a0719ddd
Deleted: sha256:24f39a586f5b3b65d97d50c0b07a703d8cbfd39e5ecc0ae6531a5e7cb463ca10
Deleted: sha256:20e862f75807b4d38abc786aa0c5dfc9e142ba1dfa928a3ebd5c1ffa406e977f
Deleted: sha256:efcbcc8463d2e09a4398feb28e60753de83ba0a8e6a77c4f84bb4bf422cabb03
Deleted: sha256:fea189a6ea98c975cba26a2c2888d4b6dcd8236cabeb6a098cdd29b5bf78d94d
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