3 The docker runtime is supported by kubespray and while the `dockershim` is deprecated to be removed in kubernetes 1.24+ there are alternative ways to use docker such as through the [cri-dockerd](https://github.com/Mirantis/cri-dockerd) project supported by Mirantis.
5 Using the docker container manager:
8 container_manager: docker
11 *Note:* `cri-dockerd` has replaced `dockershim` across supported kubernetes version in kubespray 2.20.
13 Enabling the `overlay2` graph driver:
16 docker_storage_options: -s overlay2
19 Enabling `docker_container_storage_setup`, it will configure devicemapper driver on Centos7 or RedHat7.
20 Deployers must be define a disk path for `docker_container_storage_setup_devs`, otherwise docker-storage-setup will be executed incorrectly.
23 docker_container_storage_setup: true
24 docker_container_storage_setup_devs: /dev/vdb
27 Changing the Docker cgroup driver (native.cgroupdriver); valid options are `systemd` or `cgroupfs`, default is `systemd`:
30 docker_cgroup_driver: systemd
33 If you have more than 3 nameservers kubespray will only use the first 3 else it will fail. Set the `docker_dns_servers_strict` to `false` to prevent deployment failure.
36 docker_dns_servers_strict: false
39 Set the path used to store Docker data:
42 docker_daemon_graph: "/var/lib/docker"
45 Changing the docker daemon iptables support:
48 docker_iptables_enabled: "false"
54 # Rotate container stderr/stdout logs at 50m and keep last 5
55 docker_log_opts: "--log-opt max-size=50m --log-opt max-file=5"
58 Changre the docker `bin_dir`, this should not be changed unless you use a custom docker package:
61 docker_bin_dir: "/usr/bin"
64 To keep docker packages after installation; speeds up repeated ansible provisioning runs when '1'.
65 kubespray deletes the docker package on each run, so caching the package makes sense:
68 docker_rpm_keepcache: 1
71 Allowing insecure-registry access to self hosted registries. Can be ipaddress and domain_name.
74 ## example define 172.19.16.11 or mirror.registry.io
75 docker_insecure_registries:
80 Adding other registry, i.e. China registry mirror:
83 docker_registry_mirrors:
84 - https://registry.docker-cn.com
85 - https://mirror.aliyuncs.com
88 Overriding default system MountFlags value. This option takes a mount propagation flag: `shared`, `slave` or `private`, which control whether mounts in the file system namespace set up for docker will receive or propagate mounts and unmounts. Leave empty for system default:
94 Adding extra options to pass to the docker daemon:
97 ## This string should be exactly as you wish it to appear.