Immanuel Raj

Rootless docker

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by

Immanuel Raj
in

References

ASSUMPTIONS

  1. You have no docker as root installed
  2. You have no root access (Not even use apt install)
  3. You want to install rootless and systemd style docker and docker compose and all other plugins
  4. You have a Ubuntu system – Latest (or VM) with default kernel
  5. Your Ubuntu distribution is not cutdown version

Docker Root Installation Pre-Requisites

loginctl enable-linger rtcamp # It creates /run/user/$(id -u)

export XDG_RUNTIME_DIR=/run/user/$(id -u)

echo "export PATH=/home/rtcamp/bin:\$PATH" >> ~/.bashrc

echo "export DOCKER_HOST=unix:///run/user/\$(id -u)/docker.sock" >> ~/.bashrc

Docker Installation

curl -fsSL https://get.docker.com/rootless | sh

Installing docker compose

DOCKER_COMPOSE_VER=$(curl --silent https://api.github.com/repos/docker/compose/releases | jq -r '.[0].tag_name')
 
DOCKER_CONFIG=${DOCKER_CONFIG:-$HOME/.docker} # only for the script to run
 
mkdir -p $DOCKER_CONFIG/cli-plugins
 
curl -SL https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VER}/docker-compose-linux-x86_64 -o $DOCKER_CONFIG/cli-plugins/docker-compose
 
chmod u+x $DOCKER_CONFIG/cli-plugins/docker-compose

It all works 🎉 !

But here are some common problems

Network slow

For this you can refer to https://docs.docker.com/engine/security/rootless/#network-is-slow

Using privileged ports aka <1024

#### Login to user having sudo access ####
 
cp -v /etc/sysctl.conf /tmp/sys.conf
echo "net.ipv4.ip_unprivileged_port_start=0" >> /tmp/sys.conf
 
sudo mv -v /tmp/sys.conf /etc/sysctl.conf
 
sudo sysctl --system

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