#!/bin/bash -e ## Install Docker # https://docs.docker.com/engine/install/debian/ # Install dependencies apt-get update && apt-get install --yes \ ca-certificates \ curl \ gnupg \ # Add trust and docker apt repo mkdir -m 0755 -p /etc/apt/keyrings curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg chmod a+r /etc/apt/keyrings/docker.gpg echo \ "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \ "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \ tee /etc/apt/sources.list.d/docker.list > /dev/null # Install docker apt-get update && apt-get install --yes \ docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin # allow admin to use the docker command usermod --append --groups docker admin #---------- # 1) Setup journald as log driver so we don't need to care separetly for log rotation # # 2) Change Docker Address pools # Docker default address address pools: # Vanilla # 172.17.0.0/12 split in /16 (size) => 16 networks each 65536 hosts # 192.168.0.0/16 split in /24 (size) => 256 networks each 256 hosts # More details: # https://straz.to/2021-09-08-docker-address-pools/ # Reasons to change # - Short: The configuration is not suitable for our home server # - 192.168.0.0/16 is frequently used in the home environment # - 172.17.0.0/12 size doesn't offer enough networks and we never have that many hosts # Resulting configuraiton # 172.16.0.0/12 split in /22 (size) => 1024 networks each 1024 hosts # nnnn nnnn . nnnn NNNN . NNNN NNhh . hhhh hhhh # 12 2^10 22 2^10 32 # But, we start with 172.18.0.0 and # (1) leave 172.16.0.0/16 untouched # (2.1) assign 172.17.0.0/22 to the default bridge # (2.2) use the remaing networks for special purposes 172.17.4.0, 172.17.8.0, 172.17.12.0, ... # => (1)+(2) takes each 64 /22-networks, resulting in 896 networks (1024-128) # # Tools: https://www.site24x7.com/tools/ipv4-subnetcalculator.html # Reference: RFC 1918 name: 172.16.0.0 - 172.31.255.255 # # Check configuration: docker info | grep Base # Check configuration: docker network inspect bridge | grep Subnet cat >/etc/docker/daemon.json <