1. 백업
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2130dc5d2131 tomcat:latest "catalina.sh run" 8 seconds ago Up 7 seconds 8080/tcp tomcat-container
[root@localhost ~]# docker commit tomcat-container tomcat-backup
sha256:51f35e236c795926d7b1cfc4bf380249df16b681b9b78d6ec09917e35c0a2502
[root@localhost ~]# docker save -o tomcat-container.tar tomcat-backup
container를 커밋하면 image가 생김
image를 파일로 저장
2. 복구
[root@localhost ~]# docker load -i tomcat-container.tar
5f39078cf02c: Loading layer [==================================================>] 47.1kB/47.1kB
Loaded image: tomcat-backup:latest
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat-backup latest 51f35e236c79 4 minutes ago 647MB
[root@localhost ~]# docker run -d -p 8080:8080 --restart=always --name tomcat-container tomcat-backup:latest
2ca41281972d0a0568bdbeeba36ed3a219578a234b3a5458f304326e8e7ef303
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2ca41281972d tomcat-backup:latest "catalina.sh run" 4 seconds ago Up 3 seconds 0.0.0.0:8080->8080/tcp tomcat-container
저장된 image 파일을 docker load 명령어로 불러오기
run 명령어로 container 추가