Docker 설정

Enable the remote API for dockerd

$ sudo mkdir -p /etc/systemd/system/docker.service.d
$ sudo vim /etc/systemd/system/docker.service.d/override.conf
===== override.conf =====
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock -H tcp://0.0.0.0:2375
...
==========================
$ sudo systemctl daemon-reload
$ sudo service docker restart

Default ulimit(memlock & nofile) settings (for Elasticsearch)

$ sudo vim /etc/security/limits.conf
===== limits.conf =====
...
* - memlock unlimited
* - nofile 65536
...
==========================

$ sudo mkdir -p /etc/systemd/system/docker.service.d
$ sudo vim /etc/systemd/system/docker.service.d/override.conf
===== override.conf =====
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd --default-ulimit memlock=-1 --default-ulimit nofile=65536
...
==========================
$ sudo systemctl daemon-reload
$ sudo service docker restart

Change default (/var/lib/docker) to another directory

$ sudo mkdir -p /etc/systemd/system/docker.service.d
$ sudo vim /etc/systemd/system/docker.service.d/override.conf
===== override.conf =====
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -g /another/directory
...
=============================
$ sudo systemctl daemon-reload
$ sudo service docker restart