在 swarm 中使用 secret

文档 https://docs.docker.com/engine/swarm/secrets/

创建secret

有两种方式

从标准的收入读取

vagrant@swarm-manager:~$ echo abc123 | docker secret create mysql_pass -
4nkx3vpdd41tbvl9qs24j7m6w
vagrant@swarm-manager:~$ docker secret ls
ID                          NAME         DRIVER    CREATED         UPDATED
4nkx3vpdd41tbvl9qs24j7m6w   mysql_pass             8 seconds ago   8 seconds ago
vagrant@swarm-manager:~$ docker secret inspect mysql_pass
[
    {
        "ID": "4nkx3vpdd41tbvl9qs24j7m6w",
        "Version": {
            "Index": 4562
        },
        "CreatedAt": "2021-07-25T22:36:51.544523646Z",
        "UpdatedAt": "2021-07-25T22:36:51.544523646Z",
        "Spec": {
            "Name": "mysql_pass",
            "Labels": {}
        }
    }
]
vagrant@swarm-manager:~$ docker secret rm mysql_pass
mysql_pass
vagrant@swarm-manager:~$

从文件读取

vagrant@swarm-manager:~$ ls
mysql_pass.txt
vagrant@swarm-manager:~$ more mysql_pass.txt
abc123
vagrant@swarm-manager:~$ docker secret create mysql_pass mysql_pass.txt
elsodoordd7zzpgsdlwgynq3f
vagrant@swarm-manager:~$ docker secret inspect mysql_pass
[
    {
        "ID": "elsodoordd7zzpgsdlwgynq3f",
        "Version": {
            "Index": 4564
        },
        "CreatedAt": "2021-07-25T22:38:14.143954043Z",
        "UpdatedAt": "2021-07-25T22:38:14.143954043Z",
        "Spec": {
            "Name": "mysql_pass",
            "Labels": {}
        }
    }
]
vagrant@swarm-manager:~$

secret 的使用

参考 https://hub.docker.com/_/mysql

vagrant@swarm-manager:~$ docker service create --name mysql-demo --secret mysql_pass --env MYSQL_ROOT_PASSWORD_FILE=/run/secrets/mysql_pass mysql:5.7
wb4z2ximgqaefephu9f4109c7
overall progress: 1 out of 1 tasks
1/1: running   [==================================================>]
verify: Service converged
vagrant@swarm-manager:~$ docker service ls
ID             NAME         MODE         REPLICAS   IMAGE       PORTS
wb4z2ximgqae   mysql-demo   replicated   1/1        mysql:5.7
vagrant@swarm-manager:~$ docker service ps mysql-demo
ID             NAME           IMAGE       NODE            DESIRED STATE   CURRENT STATE            ERROR     PORTS
909429p4uovy   mysql-demo.1   mysql:5.7   swarm-worker2   Running         Running 32 seconds ago
vagrant@swarm-manager:~$