練習1
1.使用busybox:latest鏡像創建t1容器,並查看其主機名
[root@localhost ~]# docker container run --name t1 -it --rm busybox:latest
/ # hostname
965e25d7692f
2.t1容器的主機名就是'CONTAINER ID'
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
965e25d7692f busybox:latest "sh" About a minute ago Up About a minute t1
3.使用busybox:latest鏡像創建t1容器,並同時指明其主機名為t1
[root@localhost ~]# docker container run --name t1 -it --rm -h t1 busybox:latest #加-h或--hostname選項可以設定主機名
/ # hostname
t1
/ # cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.2 t1 #如果容器的網路為bridge,會自動有名稱解析
/ # cat /etc/resolv.conf
# Generated by NetworkManager
search localdomain
nameserver 192.168.128.2 #如果容器的網路為bridge,會自動指向宿主機使用的DNS SERVER
4. 使用busybox:latest鏡像創建t1容器,並同時指明DNS SERVER以及搜索域
[root@localhost ~]# docker container run --name t1 -it --rm --dns 1.1.1.1 --dns-search ilinux.io busybox:latest #加--dns選項可以設定DNS SERVER;加--dns-search可以設定搜索域
/ # cat /etc/resolv.conf
search ilinux.io
nameserver 1.1.1.1
[root@localhost ~]# docker container run --name t1 -it --rm --dns 1.1.1.1 --dns 8.8.8.8 busybox:latest #設定2個DNS SERVER
/ # cat /etc/resolv.conf
search localdomain
nameserver 1.1.1.1
nameserver 8.8.8.8
5. 使用busybox:latest鏡像創建t1容器,並同時設定'www.ilinux.io'主機名稱解析的ip地址為192.168.0.1
[root@localhost ~]# docker container run --name t1 -it --rm --add-host www.ilinux.io:192.168.0.1 busybox:latest #加上--add-host HOSTNAME:IP
/ # cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
192.168.0.1 www.ilinux.io
172.17.0.2 1ceac1507fc3