Docker-命令帮助以及验证

在docker安装启动之后，默认会生成一个名称为docker0的网卡并且默认IP地址为172.17.0.1的网卡

#ubuntu18.04安装docker后网卡配置

[root@ubuntu1804 ~]#ip a

1: lo: LOOPBACK,UP,LOWER_UP mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

 inet 127.0.0.1/8 scope host lo

 valid_lft forever preferred_lft forever

 inet6 ::1/128 scope host 

 valid_lft forever preferred_lft forever

2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc fq_codel state UP group default qlen 1000

 link/ether 00:0c:29:34:df:91 brd ff:ff:ff:ff:ff:ff

 inet 10.0.0.100/24 brd 10.0.0.255 scope global eth0

 valid_lft forever preferred_lft forever

 inet6 fe80::20c:29ff:fe34:df91/64 scope link 

 valid_lft forever preferred_lft forever

4: docker0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc noqueue state UP group default 

 link/ether 02:42:d3:26:ed:4e brd ff:ff:ff:ff:ff:ff

 inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0

 valid_lft forever preferred_lft forever

 inet6 fe80::42:d3ff:fe26:ed4e/64 scope link 

 valid_lft forever preferred_lft forever

#CentOS 7.6 安装docker后网卡配置

[root@centos7 ~]#ip a

1: lo: LOOPBACK,UP,LOWER_UP mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

 inet 127.0.0.1/8 scope host lo

 valid_lft forever preferred_lft forever

 inet6 ::1/128 scope host 

 valid_lft forever preferred_lft forever

2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

 link/ether 00:0c:29:ca:00:e4 brd ff:ff:ff:ff:ff:ff

 inet 10.0.0.7/24 brd 10.0.0.255 scope global noprefixroute eth0

 valid_lft forever preferred_lft forever

 inet6 fe80::20c:29ff:feca:e4/64 scope link 

 valid_lft forever preferred_lft forever

3: docker0: NO-CARRIER,BROADCAST,MULTICAST,UP mtu 1500 qdisc noqueue state DOWN group default 

 link/ether 02:42:d2:81:c2:e0 brd ff:ff:ff:ff:ff:ff

 inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0

 valid_lft forever preferred_lft forever

#CentOS 8.1 安装docker后网卡配置 

[root@centos8 ~]#ip a 

1: lo: LOOPBACK,UP,LOWER_UP mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

 inet 127.0.0.1/8 scope host lo

 valid_lft forever preferred_lft forever

 inet6 ::1/128 scope host 

 valid_lft forever preferred_lft forever

2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc fq_codel state UP group default qlen 1000

 link/ether 00:0c:29:4d:ef:3e brd ff:ff:ff:ff:ff:ff

 inet 10.0.0.18/24 brd 10.0.0.255 scope global noprefixroute eth0

 valid_lft forever preferred_lft forever

 inet6 fe80::20c:29ff:fe4d:ef3e/64 scope link 

 valid_lft forever preferred_lft forever

3: docker0: NO-CARRIER,BROADCAST,MULTICAST,UP mtu 1500 qdisc noqueue state DOWN group default 

 link/ether 02:42:f5:3e:65:b6 brd ff:ff:ff:ff:ff:ff

 inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0

 valid_lft forever preferred_lft forever

[root@centos8 ~]#route -n

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

0.0.0.0 10.0.0.2 0.0.0.0 UG 100 0 0 eth0

10.0.0.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0

172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0

[root@ubuntu1804 ~]#docker info

Client:

 Debug Mode: false #client 端是否开启 debug

Server:

 Containers: 2 #当前 主机运行的容器总数

 Running: 0 #有几个容器是正在运行的

 Paused: 0 #有几个容器是暂停的

 Stopped: 2 #有几个容器是停止的

 Images: 4 #当前服务器的镜像数

 Server Version: 19.03.5 #服务端版本

 Storage Driver: overlay2 #正在使用的存储引擎

 Backing Filesystem: extfs #后端文件系统，即服务器的磁盘文件系统

 Supports d_type: true #是否支持 d_type

 Native Overlay Diff: true #是否支持差异数据存储

 Logging Driver: json-file #日志类型 

 Cgroup Driver: cgroupfs #Cgr oups 类型

 Plugins: #插件

 Volume: local #卷 

 Network: bridge host ipvlan macvlan null overlay # overlay 跨主机通信

 Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog #日 志类型

 Swarm: inactive #是否支持 swarm

 Runtimes: runc #已安装的容器运行时

 Default Runtime: runc #默认使用的容器运行时

 Init Binary: docker-init #初始化容器的守护进程，即 pid 为 1的进程

 containerd version: b34a5c8af56e510852c35414db4c1f4fa6172339 #版本

 runc version: 3e425f80a8c931f88e6d94a8c831b9d5aa481657 #runc 版本

 init version: fec3683 #init 版本

 Security Options: #安全选项

 apparmor #安全模块，https://docs.docker.com/engine/security/apparmor/

 seccomp #安全计算模块，即制容器操作，https://docs.docker.com/engine/security/seccomp/

 Profile: default #默认的配置文件

 Kernel Version: 4.15.0-29-generic #宿主机内核版本

 Operating System: Ubuntu 18.04.1 LTS #宿主机操作系统

 OSType: linux #宿主机操作系统类型

 Architecture: x86_64 #宿主机架构

 CPUs: 1 #宿主机 CPU 数量

 Total Memory: 962MiB #宿主机总内存 

 Name: ubuntu1804.magedu.org #宿主机 hostname

 ID: IZHJ:WPIN:BRMC:XQUI:VVVR:UVGK:NZBM:YQXT:JDWB:33RS:45V7:SQWJ #宿主机 ID

 Docker Root Dir: /var/lib/docker #宿主机关于docker数据的保存目录

 Debug Mode: false #server 端是否开启 debug

 Registry: https://index.docker.io/v1/ #仓库路径

 Labels:

 Experimental: false #是否测试版

 Insecure Registries:

 127.0.0.0/8 : #非安全的镜像仓库

 Registry Mirrors:

 https://si7y70hh.mirror.aliyuncs.com/ #镜像仓库

 Live Restore Enabled: false #是否开启 活动重启 (重启dockerdocker-daemon 不关闭 容器 )

WARNING: No swap limit support #系统警告 信息 (没有开启 swapswap资源限制 )

解决上述SWAP报警提示

[root@ubuntu1804 ~]# vim /etc/default/grub

GRUB_DEFAULT=0

GRUB_TIMEOUT_ >

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