一、现状

1、默认没有这个配置文件，手动创建一个即可。

2、我们目前使用过的操作

在“docker深入2-存储驱动之使用devicemapper(direct-lvm)模式”这一节中，我们是这样操作的：

---------------------------------------

调整 daemon.json 的配置：

[root@n33 ~]# cat /etc/docker/daemon.json

{

    "storage-driver": "devicemapper",

    "storage-opts": [

        "dm.thinpooldev=/dev/mapper/docker-thinpool",

        "dm.use_deferred_removal=true",

        "dm.use_deferred_deletion=true"

    ]

}

---------------------------------------

 

定义了 storage-driver 的值。

然后重启服务：

[root@n33 ~]# systemctl restart docker && systemctl status docker -l

 

这样做的好处：调整配置时，不用去修改 docker.service的参数，通过配置文件来管理，更为清晰合理。

 

 

 

二、探索

1、linux上一个完整的配置示例

{

    "api-cors-header": "",

    "authorization-plugins": [],

    "bip": "",

    "bridge": "",

    "cgroup-parent": "",

    "cluster-store": "",

    "cluster-store-opts": {},

    "cluster-advertise": "",

    "debug": true,

    "default-gateway": "",

    "default-gateway-v6": "",

    "default-runtime": "runc",

    "default-ulimits": {},

    "disable-legacy-registry": false,

    "dns": [],

    "dns-opts": [],

    "dns-search": [],

    "exec-opts": [],

    "exec-root": "",

    "fixed-cidr": "",

    "fixed-cidr-v6": "",

    "graph": "",

    "group": "",

    "hosts": [],

    "icc": false,

    "insecure-registries": [],

    "ip": "0.0.0.0",

    "iptables": false,

    "ipv6": false,

    "ip-forward": false,

    "ip-masq": false,

    "labels": [],

    "live-restore": true,

    "log-driver": "",

    "log-level": "",

    "log-opts": {},

    "max-concurrent-downloads": 3,

    "max-concurrent-uploads": 5,

    "mtu": 0,

    "oom-score-adjust": -500,

    "pidfile": "",

    "raw-logs": false,

    "registry-mirrors": [],

    "runtimes": {

        "runc": {

            "path": "runc"

        },

        "custom": {

            "path": "/usr/local/bin/my-runc-replacement",

            "runtimeArgs": [

                "--debug"

            ]

        }

    },

    "selinux-enabled": false,

    "storage-driver": "",

    "storage-opts": [],

    "swarm-default-advertise-addr": "",

    "tls": true,

    "tlscacert": "",

    "tlscert": "",

    "tlskey": "",

    "tlsverify": true,

    "userland-proxy": false,

    "userns-remap": ""

}

 

上述是官网docs提供的一个示例配置，我们可以参考，选择性的配置其中的部分内容。

 

2、如何配置 registry 相关的参数

涉及以下2个参数：

    "insecure-registries": [],

    "registry-mirrors": [],

 

配置示例：

[root@n33 ~]# cat /etc/docker/daemon.json

{

    "storage-driver": "devicemapper",

    "storage-opts": [

        "dm.thinpooldev=/dev/mapper/docker-thinpool",

        "dm.use_deferred_removal=true",

        "dm.use_deferred_deletion=true"

    ],

    "registry-mirrors": [

        "http://m.hub.test.com"

    ],

    "insecure-registries": [

        "hub.test.com"

    ]

}

    

    

 

ZYXW、参考

1、docs