Split group-variables

inventory/sample/group_vars/all/docker.yml

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+## Uncomment this if you want to force overlay/overlay2 as docker storage driver
+## Please note that overlay2 is only supported on newer kernels
+
+#docker_storage_options: -s overlay2
+
+## Uncomment this if you have more than 3 nameservers, then we'll only use the first 3.
+
+#docker_dns_servers_strict: false
+
+# Path used to store Docker data
+docker_daemon_graph: "/var/lib/docker"
+
+## Used to set docker daemon iptables options to true
+#docker_iptables_enabled: "true"
+
+## A string of extra options to pass to the docker daemon.
+## This string should be exactly as you wish it to appear.
+## An obvious use case is allowing insecure-registry access
+## to self hosted registries like so:
+docker_options: >-
+  --insecure-registry={{ kube_service_addresses }} --graph={{ docker_daemon_graph }} {{ docker_log_opts }}
+  {%- if ansible_architecture == "aarch64" and ansible_os_family == "RedHat" %}
+  --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current
+  --default-runtime=docker-runc --exec-opt native.cgroupdriver=systemd
+  --userland-proxy-path=/usr/libexec/docker/docker-proxy-current --signature-verification=false
+  {%- endif -%}
+
+docker_bin_dir: "/usr/bin"
+
+## If non-empty will override default system MounFlags 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
+docker_mount_flags: