* containerd docker hub registry mirror support

* add docs

* fix typo

* fix yamllint

* fix indent in sample
and ansible-playbook param in testcases_run

* fix md

* mv common vars to tests/common/_docker_hub_registry_mirror.yml

* checkout vars to upgrade tests

If crictl (and docker) binaries are deployed to the directories
that are not in standard PATH (e.g. /usr/local/bin), it is required
to specify full path to the binaries.

The task outputs the following warning:

  TASK [kubernetes/preinstall : Enable ip forwarding]
  [WARNING]: The value 1 (type int) in a string field was converted
  to u'1' (type string). If this does not look like what you expect,
  quote the entire value to ensure it does not change.

Added "boto3" as dependency in "requirements.txt" which is required by "kubespray-aws-inventory.py".

Signed-off-by: Pratik raj <rajpratik71@gmail.com>

This new version uses the same base image as kube-proxy
(k8s.gcr.io/build-image/debian-iptables)
This allow to automatically pick iptables-legacy or iptables-nft,
and be compatible with RHEL/CentOS 8
https://github.com/kubernetes/dns/pull/367



Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

Signed-off-by: zouyu <zouy.fnst@cn.fujitsu.com>

* fix flake8 errors in Kubespray CI - tox-inventory-builder

* Invalidate CRI-O kubic repo's cache

Signed-off-by: Victor Morales <v.morales@samsung.com>

* add support to configure pkg install retries

and use in CI job tf-ovh_ubuntu18-calico (due to it failing often)

* Switch Calico, Cilium and MetalLB image repos to Quay.io

Co-authored-by: Victor Morales <v.morales@samsung.com>
Co-authored-by: Barry Melbourne <9964974+bmelbourne@users.noreply.github.com>

calico PODs are first started and then in a handler killed and
restarted for no reason, nothing has changed.

By using the existing variable 'calico_cni_config' (only defined when
calico has already started) the restart can be skipped.

The previous hash was still that of v7.3.1, see https://www.pypy.org/download.html for the hash of the current release.

* add custom sec groups

* make sure groups are applied only when created

* fix spacing

* create a wrapper script with pki options
* supports all kubespray managed container engines

Co-authored-by: Hans Feldt <hafe@users.noreply.github.com>

Package upgrade restarts crio. By creating/updating config first,
an extra restart can be avoided.

* Allow the eventRecordQPS setting to be set.

The eventRecordQPS parameter controls rate limiting for event recording. When zero, unlimited events can cause denial-of-service situations. For my situation, I don't need more than a setting of "5". This change allows me to configure the setting before creating the cluster.

* Allow the eventRecordQPS setting to be set.

The default settings (see types.go) is five. So, this change does not affect the cluster provisioning. However, it does allow for the setting to be changed.

Fedora 31 uses Cgroups v2 by default. This change by passes the kernel
parameter systemd.unified_cgroup_hierarchy=0.

Signed-off-by: Victor Morales <v.morales@samsung.com>

As https://helm.sh/blog/new-location-stable-incubator-charts/
helm stable repo is changed to https://charts.helm.sh/stable
In addition, if using helm v3.4.0+ the old stable repo installation
is failed.
So this updates the stable repo to avoid such error.

When https://kubespray.io/#/docs/comparisons is generated, having the link in the heading creates the following HTML. When displayed there is no space between "vs" and the link. I simply moved the link into the following paragraph.

```
<h2 id="kubespray-vs-kops"><a href="#/docs/comparisons?id=kubespray-vs-kops" data-id="kubespray-vs-kops" class="anchor"><span>Kubespray vs </span></a><a href="https://github.com/kubernetes/kops" target="_blank" rel="noopener">Kops</a></h2>
```

When dns_mode was set to 'none' the coredns_server became an empty
string and invalid operation of adding string to list was executed.

* Add note about changing private IP in admin.conf.

When I run kubespray, a load balancer is created which should be used instead of the ip of the controller node.

* Procedure to find load balancer and update admin.conf

When I run kubespray, a load balancer is used instead of the private ip of the controller.

* update version of ingress-nginx controller.

Change tag from controller-v0.34.0 to controller-v0.40.2 to use newest tag.

* Update docs about aws deploy templates.

In the yaml templates, there is no mention of idle timeouts. This is why I removed the documentation about it. This might be a mistake. Please verify this. I don't know enough to verify it myself.

* Change label when checking version.

When checking for `app.kubernetes.io/name=ingress-nginx`, a completed pod was selected which is not helpful when trying to `exec`. Changing the label selects the running controller pod.

* put back the information about ELB Idle Timeouts.

When I removed the information, I had overlooked that it was mentioned in the L7 yaml file. Thanks.

* fixed bug in etcd retention where backups are not sorted by date

* added directory filter to find command

and thereby support upgrade from e.g. 1.18.x to 1.19.y

Included OSes:
- Centos7/8
- Ubuntu18/20

New variables for overriding by default installed packages:
- centos_crio_packages
- ubuntu_crio_packages

* added an ansible var to manage retention of etcd backups

* refactord ls/grep into find in etcd backup removal command