一、实验环境
| 原节点 | 迁移节点 |
|---|---|
| 192.168.172.133(系统版本：Ubuntu 18.04；Docker版本：19.03 ) | 192.168.172.132(CentOS 7.5；Docker版本：19.03) |
二、export命令
原节点：
root@docker:~# docker run --name web01 -d -p 8080:80 nginx:latest
b9d3c33ee7f00089a2bdd95a9e72dfe4278fbc7999d4e0b86aaba8b2d5fe9b2b
root@docker:~# docker exec -it web01 /bin/bash
root@b9d3c33ee7f0:~# cd /usr/share/nginx/html/
root@b9d3c33ee7f0:/usr/share/nginx/html# echo "Hello Docker" > index.html
root@b9d3c33ee7f0:/usr/share/nginx/html#
root@b9d3c33ee7f0:/usr/share/nginx/html# exit
exit
root@docker:~# docker stop web01
web01
root@docker:~# docker export web01 > web01.tar
root@docker:~# ll -h web01.tar
-rw-r--r-- 1 root root 123M 2月 18 16:17 web01.tar
root@docker:~# scp web01.tar 192.168.172.132:/root/
The authenticity of host '192.168.172.132 (192.168.172.132)' can't be established.
ECDSA key fingerprint is SHA256:nAwn3pSPK0xPv4KEWXV47uu6WxnKqufPmiXyI0bc9HI.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.172.132' (ECDSA) to the list of known hosts.
root@192.168.172.132's password:
web01.tar 100% 123MB 14.9MB/s 00:08
迁移节点：
[root@docker ~]# ls web01.tar -hl
-rw-r--r-- 1 root root 123M Feb 18 16:20 web01.tar
[root@docker ~]# cat web01.tar | docker import - web01
sha256:517063cc74b64e3e55675c6f445753ba1ec2694b31cb74a3c44ffa15e5185373
[root@docker ~]# docker image ls -a
[root@docker ~]# docker image ls -a
REPOSITORY TAG IMAGE ID CREATED SIZE
web01 latest 97e927886249 28 seconds ago 125MB
[root@docker ~]# docker run -it -p 8080:80 web01 /bin/bash
root@a5e5cce0d6ef:/# cat /usr/share/nginx/html/index.html
Hello Docker
三、save命令
原节点：
root@docker:~# docker run --name web02 -d -p 8080:80 nginx
87ecfc8b948eea197982ed384a40faf0e689f1d09369166177b80937a7c8e71f
root@docker:~# docker exec -it web02 /bin/bash
root@87ecfc8b948e:/# echo "Hello Docker" > /usr/share/nginx/html/index.html
root@87ecfc8b948e:/#
root@87ecfc8b948e:/# cat /usr/share/nginx/html/index.html
Hello Docker
root@87ecfc8b948e:/# exit
exit
root@docker:~# docker stop web02
web02
root@docker:~# docker commit -m "web02" web02 web02
sha256:07bdfcc4cf39ddffe4d38df00886843dd5ff946c9788f659669f46f6d617b7a6
root@docker:~#
root@docker:~# docker save -o web02.tar web02
root@docker:~# ll -h web02.tar
-rw------- 1 root root 125M 2月 18 16:43 web02.tar
root@docker:~# scp web02.tar 192.168.172.132:/root/
root@192.168.172.132's password:
web02.tar 100% 125MB 22.0MB/s 00:05
迁移节点：
[root@docker ~]# ls -lh web02.tar
-rw------- 1 root root 125M Feb 18 16:44 web02.tar
[root@docker ~]# docker load --input web02.tar
bdf8fff1f649: Loading layer [==================================================>] 12.8kB/12.8kB
Loaded image: web02:latest
[root@docker ~]# docker image ls -a
REPOSITORY TAG IMAGE ID CREATED SIZE
web02 latest 07bdfcc4cf39 4 minutes ago 127MB
[root@docker ~]# docker run -it -p 8080:80 web02 /bin/bash
root@3f4c6a4026b2:/#
root@3f4c6a4026b2:/#
root@3f4c6a4026b2:/# cat /usr/share/nginx/html/index.html
Hello Docker
四、容器卷数据迁移
原节点：
root@docker:~# mkdir /data/mydb01 -pv
mkdir: created directory '/data'
mkdir: created directory '/data/mydb01'
root@docker:~#
root@docker:~# docker run --name mydb01 -d -p 3336:3306 -v /data/mydb01/:/var/lib/mysql -e "MYSQL_ROOT_PASSWORD=redhat" mysql:5.7
c371141c91536af453be4904ece80e4267e8926ab1051ec06b5a096f4794db0d
root@docker:~# docker exec -it mydb01 /bin/bash
root@c371141c9153:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.29 MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database test charset utf8mb4;
Query OK, 1 row affected (0.01 sec)
mysql> use test;
Database changed
mysql> create table student(id int(10),name varchar(20));
Query OK, 0 rows affected (0.11 sec)
mysql> insert into student values(1,"tangmu"),(2,"jierui");
Query OK, 2 rows affected (1.48 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select * from student;
+------+--------+
| id | name |
+------+--------+
| 1 | tangmu |
| 2 | jierui |
+------+--------+
2 rows in set (0.00 sec)
mysql> exit
Bye
root@c371141c9153:/#
root@c371141c9153:/# exit
exit
root@docker:~#
root@docker:~# ll /data/mydb01/
total 188488
drwxr-xr-x 6 999 root 4096 2月 18 16:59 ./
drwxr-xr-x 3 root root 4096 2月 18 16:54 ../
-rw-r----- 1 999 docker 56 2月 18 16:57 auto.cnf
-rw------- 1 999 docker 1680 2月 18 16:57 ca-key.pem
-rw-r--r-- 1 999 docker 1112 2月 18 16:57 ca.pem
-rw-r--r-- 1 999 docker 1112 2月 18 16:57 client-cert.pem
-rw------- 1 999 docker 1680 2月 18 16:57 client-key.pem
-rw-r----- 1 999 docker 1346 2月 18 16:58 ib_buffer_pool
-rw-r----- 1 999 docker 79691776 2月 18 17:01 ibdata1
-rw-r----- 1 999 docker 50331648 2月 18 17:01 ib_logfile0
-rw-r----- 1 999 docker 50331648 2月 18 16:57 ib_logfile1
-rw-r----- 1 999 docker 12582912 2月 18 16:58 ibtmp1
drwxr-x--- 2 999 docker 4096 2月 18 16:57 mysql/
drwxr-x--- 2 999 docker 4096 2月 18 16:57 performance_schema/
-rw------- 1 999 docker 1680 2月 18 16:57 private_key.pem
-rw-r--r-- 1 999 docker 452 2月 18 16:57 public_key.pem
-rw-r--r-- 1 999 docker 1112 2月 18 16:57 server-cert.pem
-rw------- 1 999 docker 1676 2月 18 16:57 server-key.pem
drwxr-x--- 2 999 docker 12288 2月 18 16:57 sys/
drwxr-x--- 2 999 docker 4096 2月 18 17:00 test/
root@docker:~# scp -r /data/mydb01/ 192.168.172.132:/tmp/
root@192.168.172.132's password:
ib_buffer_pool 100% 1346 637.0KB/s 00:00
auto.cnf 100% 56 27.2KB/s 00:00
ib_logfile0 100% 48MB 12.8MB/s 00:03
public_key.pem 100% 452 139.6KB/s 00:00
help_keyword.frm 100% 8612 2.3MB/s 00:00
slow_log.CSV 100% 0 0.0KB/s 00:00
time_zone_transition_type.frm 100% 8748 889.5KB/s 00:00
time_zone_leap_second.frm 100% 8624 1.8MB/s 00:00
procs_priv.frm 100% 8875 2.1MB/s 00:00
func.MYI 100% 1024 103.6KB/s 00:00
user.MYD 100% 512 154.0KB/s 00:00
plugin.ibd 100% 96KB 1.3MB/s 00:00
innodb_table_stats.frm 100% 8830 2.0MB/s 00:00
procs_priv.MYD 100% 0 0.0KB/s 00:00
help_relation.ibd 100% 2048 388.1KB/s 00:00
slave_relay_log_info.ibd 100% 96KB 6.1MB/s 00:00
proc.frm 100% 9996 623.6KB/s 00:00
proc.MYD 100% 294KB 4.7MB/s 00:00
迁移节点：
[root@docker ~]# mkdir /data/mydb01
[root@docker ~]# mv /tmp/* /data/mydb01
[root@docker ~]# ll /data/mydb01
total 188484
-rw-r----- 1 root root 56 Feb 18 17:04 auto.cnf
-rw------- 1 root root 1680 Feb 18 17:04 ca-key.pem
-rw-r--r-- 1 root root 1112 Feb 18 17:04 ca.pem
-rw-r--r-- 1 root root 1112 Feb 18 17:04 client-cert.pem
-rw------- 1 root root 1680 Feb 18 17:04 client-key.pem
-rw-r----- 1 root root 1346 Feb 18 17:04 ib_buffer_pool
-rw-r----- 1 root root 79691776 Feb 18 17:04 ibdata1
-rw-r----- 1 root root 50331648 Feb 18 17:04 ib_logfile0
-rw-r----- 1 root root 50331648 Feb 18 17:04 ib_logfile1
-rw-r----- 1 root root 12582912 Feb 18 17:04 ibtmp1
drwxr-x--- 2 root root 4096 Feb 18 17:04 mysql
drwxr-x--- 2 root root 8192 Feb 18 17:04 performance_schema
-rw------- 1 root root 1680 Feb 18 17:04 private_key.pem
-rw-r--r-- 1 root root 452 Feb 18 17:04 public_key.pem
-rw-r--r-- 1 root root 1112 Feb 18 17:04 server-cert.pem
-rw------- 1 root root 1676 Feb 18 17:04 server-key.pem
drwxr-x--- 2 root root 8192 Feb 18 17:04 sys
drwxr-x--- 2 root root 58 Feb 18 17:04 test
[root@docker ~]# docker run --name mydb01 -d -p 3336:3306 -v /data/mydb01/:/var/lib/mysql/ -e "MYSQL_ROOT_PASSWORD=redhat" mysql:5.7
4aa0488518f0a438e2aa027b90033dad21da8fe5070d58b6904c15644205c392
[root@docker ~]# docker exec -it /bin/bash
"docker exec" requires at least 2 arguments.
See 'docker exec --help'.
Usage: docker exec [OPTIONS] CONTAINER COMMAND [ARG...]
Run a command in a running container
[root@docker ~]# docker exec -it mydb01 /bin/bash
root@4aa0488518f0:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.29 MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select * from student;
+------+--------+
| id | name |
+------+--------+
| 1 | tangmu |
| 2 | jierui |
+------+--------+
2 rows in set (0.01 sec)
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