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m0ng00se
Asked: 2019-10-01 18:37:18 +0800 CST

systemd wont use dockerd configuration file

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I have to use systemctl daemon-reload and systemctl restart docker after every reboot, then the docker service will use daemon.json file to override default settings.

Ubuntu server 18.04, docker-ce 18.09.7

Is there a way to make this persistent ?

user@host:~$ cat  /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
server services systemd docker

2 Answers

  1. Follow these steps.

    1. Go to /etc/init.d
    2. Add a file( say example ) and place the script you want to execute in that.
    3. chmod +x /etc/init.d/example. (permissions)
    4. Add # chkconfig: 345 99 10 inside your script
    5. Save it 6 Start the service with — service example start.

    This should work as system service/ startup service .

    Go into your example, vi /etc/init.d/example then add -

    systemctl daemon-reload
systemctl restart docker

    If your commands do the work of over-writing , this will work.

    Let me know if you face any challenge as distors do matter.

    • 1

  2. The default config file used during start up is actually this one: /var/snap/docker/current/config/daemon.json

    You can update this file instead.

    # Remove existing /etc/docker/daemon.json fisrt.
ln /var/snap/docker/current/config/daemon.json /etc/docker/daemon.json

cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF
    • 1