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which contains 65,535 addresses that can be used for container networks. The various tools below use different default subnets and are configured differently. Known configurations are listed below. If there are any others that should be added, FAST members can edit this page, or a request can be made to document the specific tooling.

Configurations

Docker

/etc/docker/daemon.json

{
....
  "default-address-pools": [
    {"base":"10.255.0.0/16","size":25}
  ]
}

...

TODO: Fill in instructions for doing this

Docker Swarm

In addition to the above docker configuration, you must also do the following

...

default-addr-pool-mask-length specifies the default network size for each docker network. /25 contains 128 addresses, so adjust based on your needs.

Podman

See https://github.com/containers/common/blob/main/docs/containers.conf.5.md for configuration locations

...

size specifies the default network size for each docker network. /25 contains 128 addresses, so adjust based on your needs.

Kubernetes

This is highly dependent on which provider you are using. k3s uses docker, so use the Docker instructions.

RKE2

This should be done when creating the cluster, it isn’t well supported to change this after creation

...

cluster-cidr: 10.255.0.0/17
service-cidr: 10.255.128.0/17

LXC

/etc/default/lxc-net

LXC_BRIDGE="lxcbr0"
LXC_ADDR="10.255.0.1"
LXC_NETMASK="255.255.0.0"
LXC_NETWORK="10.255.0.0/16"
LXC_DHCP_RANGE="10.255.0.2,10.255.255.254"
LXC_DHCP_MAX="65533"

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