- In a first way, you change the docker systemd file.
- In a second way, you add the Docker daemon configuration.
Create docker directory
mkdir /etc/systemd/system/docker.service.d
Create configuration file
touch /etc/systemd/system/docker.service.d/override.conf
Add --registry-mirror
config on override.conf
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd --registry-mirror https://docker.DockerMe.ir/
apply this change and check it
# updating systemd configuration
systemctl daemon-reload
# restart docker service
systemctl restart docker
# check docker service status
systemctl status docker
check docker config
docker info | grep -A1 "Registry Mirrors"
# sample output
Registry Mirrors:
https://docker.DockerMe.ir/
# systemctl edit UNIT ==> Edit one or more unit files
systemctl edit docker
[Service]
Environment=HTTP_PROXY=http://127.0.0.1:8123
Environment=HTTPS_PROXY=http://127.0.0.1:8123
Environment=NO_PROXY=localhost,127.0.0.1,repo.dockerme.ir
ExecStart=
ExecStart=/usr/bin/dockerd \
--registry-mirror https://docker.DockerMe.ir \
-H tcp://127.0.0.1:2375 \
--bip 172.21.0.1/24 \
--ip 0.0.0.0 \
--data-root /mnt/docker/ \
--log-opt max-size=100m --log-opt max-file=5
Create daemon config file
touch /etc/docker/daemon.json
Either pass the --registry-mirror option when starting dockerd manually, or edit /etc/docker/daemon.json and add the registry-mirrors key and value, to make the change persistent.
{
"registry-mirrors": ["https://docker.DockerMe.ir/"]
}
apply this change and check it
# restart docker service
systemctl restart docker
# check docker service status
systemctl status docker
check docker config
docker info | grep -A1 "Registry Mirrors"
# sample output
Registry Mirrors:
https://docker.DockerMe.ir/
Usage: dockerd COMMAND
A self-sufficient runtime for containers.
Options:
--add-runtime runtime Register an additional OCI compatible runtime (default [])
--allow-nondistributable-artifacts list Allow push of nondistributable artifacts to registry
--api-cors-header string Set CORS headers in the Engine API
--authorization-plugin list Authorization plugins to load
--bip string Specify network bridge IP
-b, --bridge string Attach containers to a network bridge
--cgroup-parent string Set parent cgroup for all containers
--config-file string Daemon configuration file (default "/etc/docker/daemon.json")
--containerd string containerd grpc address
--containerd-namespace string Containerd namespace to use (default "moby")
--containerd-plugins-namespace string Containerd namespace to use for plugins (default "plugins.moby")
--cpu-rt-period int Limit the CPU real-time period in microseconds for the
parent cgroup for all containers
--cpu-rt-runtime int Limit the CPU real-time runtime in microseconds for the
parent cgroup for all containers
--cri-containerd start containerd with cri
--data-root string Root directory of persistent Docker state (default "/var/lib/docker")
-D, --debug Enable debug mode
--default-address-pool pool-options Default address pools for node specific local networks
--default-cgroupns-mode string Default mode for containers cgroup namespace ("host" | "private") (default "host")
--default-gateway ip Container default gateway IPv4 address
--default-gateway-v6 ip Container default gateway IPv6 address
--default-ipc-mode string Default mode for containers ipc ("shareable" | "private") (default "private")
--default-runtime string Default OCI runtime for containers (default "runc")
--default-shm-size bytes Default shm size for containers (default 64MiB)
--default-ulimit ulimit Default ulimits for containers (default [])
--dns list DNS server to use
--dns-opt list DNS options to use
--dns-search list DNS search domains to use
--exec-opt list Runtime execution options
--exec-root string Root directory for execution state files (default "/var/run/docker")
--experimental Enable experimental features
--fixed-cidr string IPv4 subnet for fixed IPs
--fixed-cidr-v6 string IPv6 subnet for fixed IPs
-G, --group string Group for the unix socket (default "docker")
--help Print usage
-H, --host list Daemon socket(s) to connect to
--host-gateway-ip ip IP address that the special 'host-gateway' string in --add-host resolves to.
Defaults to the IP address of the default bridge
--icc Enable inter-container communication (default true)
--init Run an init in the container to forward signals and reap processes
--init-path string Path to the docker-init binary
--insecure-registry list Enable insecure registry communication
--ip ip Default IP when binding container ports (default 0.0.0.0)
--ip-forward Enable net.ipv4.ip_forward (default true)
--ip-masq Enable IP masquerading (default true)
--iptables Enable addition of iptables rules (default true)
--ip6tables Enable addition of ip6tables rules (default false)
--ipv6 Enable IPv6 networking
--label list Set key=value labels to the daemon
--live-restore Enable live restore of docker when containers are still running
--log-driver string Default driver for container logs (default "json-file")
-l, --log-level string Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info")
--log-opt map Default log driver options for containers (default map[])
--max-concurrent-downloads int Set the max concurrent downloads for each pull (default 3)
--max-concurrent-uploads int Set the max concurrent uploads for each push (default 5)
--max-download-attempts int Set the max download attempts for each pull (default 5)
--metrics-addr string Set default address and port to serve the metrics api on
--mtu int Set the containers network MTU
--network-control-plane-mtu int Network Control plane MTU (default 1500)
--no-new-privileges Set no-new-privileges by default for new containers
--node-generic-resource list Advertise user-defined resource
--oom-score-adjust int Set the oom_score_adj for the daemon (default -500)
-p, --pidfile string Path to use for daemon PID file (default "/var/run/docker.pid")
--raw-logs Full timestamps without ANSI coloring
--registry-mirror list Preferred Docker registry mirror
--rootless Enable rootless mode; typically used with RootlessKit
--seccomp-profile string Path to seccomp profile
--selinux-enabled Enable selinux support
--shutdown-timeout int Set the default shutdown timeout (default 15)
-s, --storage-driver string Storage driver to use
--storage-opt list Storage driver options
--swarm-default-advertise-addr string Set default address or interface for swarm advertised address
--tls Use TLS; implied by --tlsverify
--tlscacert string Trust certs signed only by this CA (default "~/.docker/ca.pem")
--tlscert string Path to TLS certificate file (default "~/.docker/cert.pem")
--tlskey string Path to TLS key file (default "~/.docker/key.pem")
--tlsverify Use TLS and verify the remote
--userland-proxy Use userland proxy for loopback traffic (default true)
--userland-proxy-path string Path to the userland proxy binary
--userns-remap string User/Group setting for user namespaces
-v, --version Print version information and quit
{
"allow-nondistributable-artifacts": [],
"api-cors-header": "",
"authorization-plugins": [],
"bip": "",
"bridge": "",
"cgroup-parent": "",
"cluster-advertise": "",
"cluster-store": "",
"cluster-store-opts": {},
"containerd": "/run/containerd/containerd.sock",
"containerd-namespace": "docker",
"containerd-plugin-namespace": "docker-plugins",
"data-root": "",
"debug": true,
"default-address-pools": [
{
"base": "172.80.0.0/16",
"size": 24
},
{
"base": "172.90.0.0/16",
"size": 24
}
],
"default-cgroupns-mode": "private",
"default-gateway": "",
"default-gateway-v6": "",
"default-runtime": "runc",
"default-shm-size": "64M",
"default-ulimits": {
"nofile": {
"Hard": 64000,
"Name": "nofile",
"Soft": 64000
}
},
"dns": [],
"dns-opts": [],
"dns-search": [],
"exec-opts": [],
"exec-root": "",
"experimental": false,
"features": {},
"fixed-cidr": "",
"fixed-cidr-v6": "",
"group": "",
"hosts": [],
"icc": false,
"init": false,
"init-path": "/usr/libexec/docker-init",
"insecure-registries": [],
"ip": "0.0.0.0",
"ip-forward": false,
"ip-masq": false,
"iptables": false,
"ip6tables": false,
"ipv6": false,
"labels": [],
"live-restore": true,
"log-driver": "json-file",
"log-level": "",
"log-opts": {
"cache-disabled": "false",
"cache-max-file": "5",
"cache-max-size": "20m",
"cache-compress": "true",
"env": "os,customer",
"labels": "somelabel",
"max-file": "5",
"max-size": "10m"
},
"max-concurrent-downloads": 3,
"max-concurrent-uploads": 5,
"max-download-attempts": 5,
"mtu": 0,
"no-new-privileges": false,
"node-generic-resources": [
"NVIDIA-GPU=UUID1",
"NVIDIA-GPU=UUID2"
],
"oom-score-adjust": -500,
"pidfile": "",
"raw-logs": false,
"registry-mirrors": [],
"runtimes": {
"cc-runtime": {
"path": "/usr/bin/cc-runtime"
},
"custom": {
"path": "/usr/local/bin/my-runc-replacement",
"runtimeArgs": [
"--debug"
]
}
},
"seccomp-profile": "",
"selinux-enabled": false,
"shutdown-timeout": 15,
"storage-driver": "",
"storage-opts": [],
"swarm-default-advertise-addr": "",
"tls": true,
"tlscacert": "",
"tlscert": "",
"tlskey": "",
"tlsverify": true,
"userland-proxy": false,
"userland-proxy-path": "/usr/libexec/docker-proxy",
"userns-remap": ""
}