++kubeam config

This commit is contained in:
Nico Schottelius 2021-05-30 01:12:21 +02:00
parent 2ea8169e60
commit e150d06a3c
3 changed files with 64 additions and 11 deletions

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## Introduction ## Introduction
The following guide shows how to setup an IPv6 only cluster at ungleich. The following guide shows how to setup an IPv6 only cluster at ungleich.
@ -12,9 +13,11 @@ The following guide shows how to setup an IPv6 only cluster at ungleich.
Initialise with all components: Initialise with all components:
``` ```
kubeadm init --service-cidr 2a0a:e5c0:13:aaa::/108 --pod-network-cidr 2a0a:e5c0:13:bbb::/64 kubeadm init --config kubeadm-config.yaml
``` ```
We need to specify the **--config** option to inject correct cgroupdriver!
We cannot yet skip kube-proxy, because calico does not support eBPF We cannot yet skip kube-proxy, because calico does not support eBPF
for IPv6. Cilium supports IPv6 eBPF, but on the other hand does not for IPv6. Cilium supports IPv6 eBPF, but on the other hand does not
support automatic BGP peering. So the following **does not** work: support automatic BGP peering. So the following **does not** work:
@ -24,16 +27,6 @@ kubeadm init --skip-phases=addon/kube-proxy --service-cidr 2a0a:e5c0:13:aaa::/10
kubeadm init --service-cidr 2a0a:e5c0:13:aaa::/108 --pod-network-cidr 2a0a:e5c0:13:bbb::/64 kubeadm init --service-cidr 2a0a:e5c0:13:aaa::/108 --pod-network-cidr 2a0a:e5c0:13:bbb::/64
``` ```
## Alpine / kubelet hack
Due to some misconfiguration on alpine, **DURING** the **kubeadm
init** we need to modify the **generated**
/var/lib/kubelet/config.yaml to replace "cgroupDriver: systemd" with
"cgroupDriver: cgroupfs".
The same is necessary on the worker nodes, however that can be done
anytime before you plan to schedule containers on them, after the
**kubeadm join** request.
## Worker nodes ## Worker nodes
@ -110,3 +103,37 @@ included **nginx-test-deployment.yaml**:
``` ```
kubectl apply -f nginx-test-deployment.yaml kubectl apply -f nginx-test-deployment.yaml
``` ```
## Kubevirt
Based on https://kubevirt.io/user-guide/operations/installation/:
```
export RELEASE=v0.35.0
# Deploy the KubeVirt operator
kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-operator.yaml
# Create the KubeVirt CR (instance deployment request) which triggers the actual installation
kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-cr.yaml
```
This never happens:
```
# wait until all KubeVirt components are up
$ kubectl -n kubevirt wait kv kubevirt --for condition=Available
```
## Old/obsolete information
### Alpine / kubelet hack
Due to some misconfiguration on alpine, **DURING** the **kubeadm
init** we need to modify the **generated**
/var/lib/kubelet/config.yaml to replace "cgroupDriver: systemd" with
"cgroupDriver: cgroupfs".
The same is necessary on the worker nodes, however that can be done
anytime before you plan to schedule containers on them, after the
**kubeadm join** request.
**THIS is fixed if we use a kubeadm config file specifying the cgroupdriver**.

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# kubeadm-config.yaml
kind: ClusterConfiguration
apiVersion: kubeadm.k8s.io/v1beta2
kubernetesVersion: v1.21.0
networking:
dnsDomain: k8s.place7.ungleich.ch
podSubnet: 2a0a:e5c0:13:e1::/64
serviceSubnet: 2a0a:e5c0:13:e2::/108
---
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: cgroupfs

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# kubeadm-config.yaml
kind: ClusterConfiguration
apiVersion: kubeadm.k8s.io/v1beta2
kubernetesVersion: v1.21.0
networking:
dnsDomain: k8s.place7.ungleich.ch
podSubnet: 2a0a:e5c0:13:bbb::/64
serviceSubnet: 2a0a:e5c0:13:aaa::/108
---
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: cgroupfs