docker深入2-linux下的配置文件daemon.json使用示例
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：
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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
https:
//docs
.docker.com
/engine/reference/commandline/dockerd/
#/linux-configuration-file