关于如何使用docker部署centos系统测试环境

目录一、检查本地服务器系统版本二、检查docker版本三、检查docker状态四、下载centos镜像五、创建centos容器1.运行cnentos容器2.进入容器内六、centos容器内部测试1.安装ifconfig命令的软件包2.查看容器内IP地址3.测试与宿主机网络连通情况4.让centos容器后台运行

一、检查本地服务器系统版本

[root@node ~]# cat /etc/os-release NAME=”CentOS Linux” VERSION=”7 (Core)” ID=”centos” ID_LIKE=”rhel fedora” VERSION_ID=”7″ PRETTY_NAME=”CentOS Linux 7 (Core)” ANSI_COLOR=”0;31″ CPE_NAME=”cpe:/o:centos:centos:7″ HOME_URL=”https://www.centos.org/” BUG_REPORT_URL=”https://bugs.centos.org/” CENTOS_MANTISBT_PROJECT=”CentOS-7″ CENTOS_MANTISBT_PROJECT_VERSION=”7″ REDHAT_SUPPORT_PRODUCT=”centos” REDHAT_SUPPORT_PRODUCT_VERSION=”7″ [root@node ~]# cat /etc/centos-release CentOS Linux release 7.6.1810 (Core)

二、检查docker版本

[root@node ~]# docker version Client: Docker Engine – Community Version: 20.10.17 API version: 1.41 Go version: go1.17.11 Git commit: 100c701 Built: Mon Jun 6 23:05:12 2022 OS/Arch: linux/amd64 Context: default Experimental: true Server: Docker Engine – Community Engine: Version: 20.10.17 API version: 1.41 (minimum version 1.12) Go version: go1.17.11 Git commit: a89b842 Built: Mon Jun 6 23:03:33 2022 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.6.6 GitCommit: 10c12954828e7c7c9b6e0ea9b0c02b01407d3ae1 runc: Version: 1.1.2 GitCommit: v1.1.2-0-ga916309 docker-init: Version: 0.19.0 GitCommit: de40ad0

三、检查docker状态

[root@node ~]# systemctl status docker ● docker.service – Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled) Active: active (running) since Fri 2022-11-04 09:12:32 CST; 18h ago Docs: https://docs.docker.com Main PID: 10162 (dockerd) Tasks: 62 Memory: 3.6G CGroup: /system.slice/docker.service ├─10162 /usr/bin/dockerd -H fd:// –containerd=/run/containerd/containerd.sock ├─21803 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 27217 -container-ip 172.17.0.2 -container-port 27017 ├─21808 /usr/bin/docker-proxy -proto tcp -host-ip :: -host-port 27217 -container-ip 172.17.0.2 -container-port 27017 ├─33495 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 3548 -container-ip 172.17.0.3 -container-port 3306 ├─33501 /usr/bin/docker-proxy -proto tcp -host-ip :: -host-port 3548 -container-ip 172.17.0.3 -container-port 3306 ├─43634 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 8080 -container-ip 172.17.0.4 -container-port 80 ├─43640 /usr/bin/docker-proxy -proto tcp -host-ip :: -host-port 8080 -container-ip 172.17.0.4 -container-port 80 ├─59700 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 8098 -container-ip 172.17.0.5 -container-port 80 └─59705 /usr/bin/docker-proxy -proto tcp -host-ip :: -host-port 8098 -container-ip 172.17.0.5 -container-port 80 Nov 04 10:00:54 node dockerd[10162]: time=”2022-11-04T10:00:54.645415843+08:00″ level=info msg=”Attempting next endpoint for pull after …unknown” Nov 04 11:46:29 node dockerd[10162]: time=”2022-11-04T11:46:29.261326827+08:00″ level=info msg=”Attempting next endpoint for pull after …unknown” Nov 04 11:47:04 node dockerd[10162]: time=”2022-11-04T11:47:04.769147449+08:00″ level=info msg=”Download failed, retrying (1/5): net/htt…timeout” Nov 04 11:51:16 node dockerd[10162]: time=”2022-11-04T11:51:16.548891252+08:00″ level=error msg=”Not continuing with pull after error: c…anceled” Nov 04 11:55:42 node dockerd[10162]: time=”2022-11-04T11:55:42.370401579+08:00″ level=info msg=”ignoring event” container=ac860c2aa163e2…kDelete” Nov 04 14:31:26 node dockerd[10162]: time=”2022-11-04T14:31:26.826919720+08:00″ level=warning msg=”reference for unknown type: applicati…:latest” Nov 04 14:31:27 node dockerd[10162]: time=”2022-11-04T14:31:27.105606415+08:00″ level=warning msg=”Error persisting manifest” digest=”sha256:f2e… Nov 04 14:31:27 node dockerd[10162]: time=”2022-11-04T14:31:27.105748609+08:00″ level=warning msg=”Image docker.io/romainlecomte/lighthttpd-dock… Nov 04 14:45:39 node dockerd[10162]: time=”2022-11-04T14:45:39.628278832+08:00″ level=error msg=”Not continuing with pull after error: m…unknown” Nov 04 14:45:39 node dockerd[10162]: time=”2022-11-04T14:45:39.628408475+08:00″ level=error msg=”Handler for POST /v1.41/images/create r…unknown” Hint: Some lines were ellipsized, use -l to show in full.

四、下载centos镜像

[root@node ~]# docker pull centos:7 7: Pulling from library/centos Digest: sha256:9d4bcbbb213dfd745b58be38b13b996ebb5ac315fe75711bd618426a630e0987 Status: Image is up to date for centos:7 docker.io/library/centos:7

五、创建centos容器

1.运行cnentos容器

[root@node ~]# docker run -it –name centos_test centos:7 /bin/bash [root@db4f4dfa3a84 /]#

2.进入容器内

[root@node ~]# docker run -it –name centos_test centos:7 /bin/bash [root@db4f4dfa3a84 /]# ls anaconda-post.log bin dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var [root@db4f4dfa3a84 /]# pwd /

六、centos容器内部测试

1.安装ifconfig命令的软件包

[root@db4f4dfa3a84 /]# yum -y install net-tools Loaded plugins: fastestmirror, ovl Loading mirror speeds from cached hostfile * base: mirrors.huaweicloud.com * extras: mirrors.ustc.edu.cn * updates: mirrors.ustc.edu.cn Resolving Dependencies –> Running transaction check —> Package net-tools.x86_64 0:2.0-0.25.20131004git.el7 will be installed –> Finished Dependency Resolution Dependencies Resolved =================================================================================================================================================== Package Arch Version Repository Size =================================================================================================================================================== Installing: net-tools x86_64 2.0-0.25.20131004git.el7 base 306 k Transaction Summary =================================================================================================================================================== Install 1 Package Total download size: 306 k Installed size: 917 k Downloading packages: net-tools-2.0-0.25.20131004git.el7.x86_64.rpm | 306 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : net-tools-2.0-0.25.20131004git.el7.x86_64 1/1 Verifying : net-tools-2.0-0.25.20131004git.el7.x86_64 1/1 Installed: net-tools.x86_64 0:2.0-0.25.20131004git.el7 Complete!

2.查看容器内IP地址

[root@db4f4dfa3a84 /]# ifconfigeth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.0.6 netmask 255.255.0.0 broadcast 172.17.255.255 ether 02:42:ac:11:00:06 txqueuelen 0 (Ethernet) RX packets 7037 bytes 25618849 (24.4 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 4655 bytes 269171 (262.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 loop txqueuelen 1000 (Local Loopback) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0[root@db4f4dfa3a84 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.0.6 netmask 255.255.0.0 broadcast 172.17.255.255 ether 02:42:ac:11:00:06 txqueuelen 0 (Ethernet) RX packets 7037 bytes 25618849 (24.4 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 4655 bytes 269171 (262.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 loop txqueuelen 1000 (Local Loopback) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

3.测试与宿主机网络连通情况

[root@db4f4dfa3a84 /]# ping 192.168.3.166 -c 6 PING 192.168.3.166 (192.168.3.166) 56(84) bytes of data. 64 bytes from 192.168.3.166: icmp_seq=1 ttl=64 time=0.091 ms 64 bytes from 192.168.3.166: icmp_seq=2 ttl=64 time=0.130 ms 64 bytes from 192.168.3.166: icmp_seq=3 ttl=64 time=0.104 ms 64 bytes from 192.168.3.166: icmp_seq=4 ttl=64 time=0.109 ms 64 bytes from 192.168.3.166: icmp_seq=5 ttl=64 time=0.075 ms 64 bytes from 192.168.3.166: icmp_seq=6 ttl=64 time=0.092 ms — 192.168.3.166 ping statistics — 6 packets transmitted, 6 received, 0% packet loss, time 5010ms rtt min/avg/max/mdev = 0.075/0.100/0.130/0.018 ms

4.让centos容器后台运行

从容器退出，但不停止容器: Ctrl+P+Q

[root@node ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES db4f4dfa3a84 centos:7 “/bin/bash” 11 minutes ago Up 11 minutes centos_test