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3 years ago

Rename ansible groups to use _ instead of - (#7552) · 360aff4a

Cristian Calin authored 3 years ago

* rename ansible groups to use _ instead of -

k8s-cluster -> k8s_cluster
k8s-node -> k8s_node
calico-rr -> calico_rr
no-floating -> no_floating

Note: kube-node,k8s-cluster groups in upgrade CI
      need clean-up after v2.16 is tagged

* ensure old groups are mapped to the new ones

360aff4a

Rename ansible groups to use _ instead of - (#7552)

Cristian Calin authored 3 years ago

* rename ansible groups to use _ instead of -

k8s-cluster -> k8s_cluster
k8s-node -> k8s_node
calico-rr -> calico_rr
no-floating -> no_floating

Note: kube-node,k8s-cluster groups in upgrade CI
      need clean-up after v2.16 is tagged

* ensure old groups are mapped to the new ones

kata-containers.md 1.96 KiB

Kata Containers

Kata Containers is a secure container runtime with lightweight virtual machines that supports multiple hypervisor solutions.

Hypervisors

Qemu is the only hypervisor supported by Kubespray.

Installation

To use Kata Containers, set the following variables:

k8s_cluster.yml:

container_manager: containerd
kata_containers_enabled: true

etcd.yml:

etcd_deployment_type: host

Configuration

Recommended : Pod Overhead

Pod Overhead is a feature for accounting for the resources consumed by the Runtime Class used by the Pod.

When this feature is enabled, Kubernetes will count the fixed amount of CPU and memory set in the configuration as used by the virtual machine and not by the containers running in the Pod.

Pod Overhead is mandatory if you run Pods with Kata Containers that use resources limits.

Set cgroup driver:

To enable Pod Overhead feature you have to configure Kubelet with the appropriate cgroup driver, using the following configuration:

kubelet_cgroup_driver: cgroupfs

Qemu hypervisor configuration:

The configuration for the Qemu hypervisor uses the following values:

kata_containers_qemu_overhead: true
kata_containers_qemu_overhead_fixed_cpu: 10m
kata_containers_qemu_overhead_fixed_memory: 290Mi

Optional : Select Kata Containers version

Optionally you can select the Kata Containers release version to be installed. The available releases are published in GitHub.

kata_containers_version: 1.11.1

Optional : Debug

Debug is disabled by default for all the components of Kata Containers. You can change this behaviour with the following configuration:

kata_containers_qemu_debug: 'false'