containerd support (#4664)

* Add limited containerd support

Containerd support for Ubuntu + Calico

* Added CRI-O support for ubuntu

* containerd support.

* Reset  containerd support.

* fix lint.

* implemented feedback

* Change task name cri xx instead of cri-o in reset task and timeout condition.

* set crictl to fixed version

* Use docker-ce's container.io package for containerd.

* Add check containerd is installable or not.

* Avoid stop docker when use containerd and optimize retry for reset.

* Add config.toml.

* Fixed containerd for kubelet.env.

* Merge PR #4629

* Remove unused ubuntu variable for containerd

* Polish code for containerd and cri-o

* Refactoring cri socket configuration.

* Configurable conmon.

* Remove unused crictl/runc download

* Now crictl and runc is downloaded by common crictl.yml.

* fixed yamllint error

* Fixed brokenfiles by conflict.

* Remove commented line in config.toml

* Remove readded v1.12.x version

* Fixed broken set_docker_image_facts

* Fix yamllint errors.

* Remove unused apt source

* Fix crictl could not be installed

* Add containerd config from skolekonov's PR #4601

roles/kubespray-defaults/defaults/main.yaml

@@ -46,6 +46,7 @@ haproxy_config_dir: "/etc/haproxy"
 # Directory where the binaries will be installed
 bin_dir: /usr/local/bin
 docker_bin_dir: /usr/bin
+containerd_bin_dir: /usr/bin
 etcd_data_dir: /var/lib/etcd
 # Where the binaries will be downloaded.
 # Note: ensure that you've enough disk space (about 1G)
@@ -258,6 +259,9 @@ docker_options: >-
 # Experimental kubeadm etcd deployment mode. Available only for new deployment
 etcd_kubeadm_enabled: false
 
+# Containerd options
+containerd_use_systemd_cgroup: false
+
 # Settings for containerized control plane (etcd/kubelet/secrets)
 # deployment type for legacy etcd mode
 etcd_deployment_type: docker