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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)

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Signed-off-by: holmesb <5072156+holmesb@users.noreply.github.com>
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holmesb 2020-10-09 09:15:07 +01:00 committed by GitHub
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7
docs/proxy.md
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@ -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`

2
docs/vars.md
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@ -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.

5
inventory/sample/group_vars/all/all.yml
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@ -68,6 +68,11 @@ loadbalancer_apiserver_healthcheck_port: 8081
## If you need exclude all cluster nodes from proxy and other resources, add other resources here.
# additional_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 below to true:
no_proxy_exclude_workers: false
## Certificate Management
## This setting determines whether certs are generated via scripts.
## Chose 'none' if you provide your own certificates.

7
roles/kubespray-defaults/tasks/no_proxy.yml Normal file → Executable file
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@ -6,7 +6,12 @@
{{ apiserver_loadbalancer_domain_name| default('') }},
{{ loadbalancer_apiserver.address | default('') }},
{%- endif -%}
{%- for item in (groups['k8s-cluster'] + groups['etcd'] + groups['calico-rr']|default([]))|unique -%}
{%- if ( (no_proxy_exclude_workers is defined) and (no_proxy_exclude_workers) ) -%}
{% set cluster_or_master = 'kube-master' %}
{% else %}
{% set cluster_or_master = 'k8s-cluster' %}
{% endif %}
{%- for item in (groups[cluster_or_master] + groups['etcd'] + groups['calico-rr']|default([]))|unique -%}
{{ hostvars[item]['access_ip'] | default(hostvars[item]['ip'] | default(fallback_ips[item])) }},
{%- if item != hostvars[item].get('ansible_hostname', '') -%}
{{ hostvars[item]['ansible_hostname'] }},