Turn on iptables for flannel

Closes: #1135
Closes: #1026
Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

inventory/group_vars/k8s-cluster.yml

@@ -102,7 +102,7 @@ docker_daemon_graph: "/var/lib/docker"
 ## 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 }} --iptables=false"
+docker_options: "--insecure-registry={{ kube_service_addresses }} --graph={{ docker_daemon_graph }}"
 docker_bin_dir: "/usr/bin"
 
 # Settings for containerized control plane (etcd/kubelet/secrets)

roles/docker/templates/docker-options.conf.j2

@@ -1,2 +1,2 @@
 [Service]
-Environment="DOCKER_OPTS={% if docker_options is defined %}{{ docker_options }}{% endif %}"
+Environment="DOCKER_OPTS={% if docker_options is defined %}{{ docker_options }}{% endif %} --iptables={% if kube_network_plugin == 'flannel' %}true{% else %}false{% endif %}"

roles/kargo-defaults/defaults/main.yaml

@@ -101,7 +101,7 @@ docker_daemon_graph: "/var/lib/docker"
 ## 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 }} --iptables=false"
+docker_options: "--insecure-registry={{ kube_service_addresses }} --graph={{ docker_daemon_graph }}"
 
 # Settings for containerized control plane (etcd/kubelet/secrets)
 etcd_deployment_type: docker