If no_proxy_exclude_workers is true, workers will be excluded from the no_proxy variable. This prevents docker engine restarting when scaling workers. (#6520)

Signed-off-by: holmesb <5072156+holmesb@users.noreply.github.com>

docs/proxy.md

@@ -14,3 +14,10 @@ If you set http and https proxy, all nodes and loadbalancer will be excluded fro
 ## Set additional addresses to default no_proxy (all cluster nodes and loadbalancer)
 
 `additional_no_proxy: "aditional_host,"`
+
+## Exclude workers from no_proxy
+
+Since workers are included in the no_proxy variable, by default, docker engine will be restarted on all nodes (all
+pods will restart) when adding or removing workers.  To override this behaviour by only including master nodes in the
+no_proxy variable, set:
+`no_proxy_exclude_workers: true`

docs/vars.md

@@ -109,7 +109,7 @@ Stack](https://github.com/kubernetes-sigs/kubespray/blob/master/docs/dns-stack.m
 * *docker_plugins* - This list can be used to define [Docker plugins](https://docs.docker.com/engine/extend/) to install.
 * *containerd_config* - Controls some parameters in containerd configuration file (usually /etc/containerd/config.toml).
   [Default config](https://github.com/kubernetes-sigs/kubespray/blob/master/roles/container-engine/containerd/defaults/main.yml) can be overriden in inventory vars.
-* *http_proxy/https_proxy/no_proxy* - Proxy variables for deploying behind a
+* *http_proxy/https_proxy/no_proxy/no_proxy_exclude_workers/additional_no_proxy* - Proxy variables for deploying behind a
   proxy. Note that no_proxy defaults to all internal cluster IPs and hostnames
   that correspond to each node.
 * *kubelet_deployment_type* - Controls which platform to deploy kubelet on.