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This document describes steps required to deploy a sample environment and test for CFN (Computing Force Network) Ubiquitous Computing Force Scheduling Blueprint.

Deployment Architecture

Image Added

Control plane: one k8s cluster is deployed in private lab.

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0 Environmental description

At least two CentOS machines are required, one as the master node and the other as the worker node. The installed k8s version is 1.23.7.

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# master
kubeadm init --image-repository registry.aliyuncs.com/google_containers --kubernetes-version=v1.23.7 --pod-network-cidr=10.10.0.0/16

Execute screenshot

Let kubectl take effect

Execute command

# master
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
kubectl get po -A

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Here select cilium as the network plugin

Confirm that your current default version of the kernel is above 4.9

Check the current kernel version

Execute command

# master  
uname -sr

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7 Propagate a deployment by Karmada

Before propagating a deployment, make sure the worker cluster is already working properly And get the latest config currently running

In the following steps, we are going to propagate a deployment by Karmada. We use the installation of nginx as an example

7.1 Join a worker/member cluster to karmada control plane

Here we add the working node cluster through push mode

It is worth noting that /root/.kube/config is Kubernetes host config and the /etc/karmada/karmada-apiserver.config is karmada-apiserver config

Execute command

kubectl karmada --kubeconfig /etc/karmada/karmada-apiserver.config join ${YOUR MEMBER NAME} --cluster-kubeconfig=${YOUR MEMBER CONFIG PATH} --cluster-context=${YOUR CLUSTER CONTEXT}

Here is example command for your information: kubectl karmada --kubeconfig /etc/karmada/karmada-apiserver.config  join member1 --cluster-kubeconfig=/root/.kube/member1-config --cluster-context=kubernetes-admin@kubernetes

• --kubeconfig  specifies the Karmada's kubeconfig file and the CLI 
• --cluster-kubeconfig specifies the member's config. Generally, it can be obtained from the worker cluster in "/root/.kube/config"
• --cluster-context the value of current-context from --cluster-kubeconfig

If you want unjoin the member cluster, just change the join to unjoin:   kubectl karmada --kubeconfig /etc/karmada/karmada-apiserver.config  unjoin member2 --cluster-kubeconfig=/root/.kube/192.168.30.2_config --cluster-context=kubernetes-admin@kubernetes

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7.2 Create nginx deployment in Karmada

deployment.yaml  are obtained through here https://github.com/karmada-io/karmada/tree/master/samples/nginx

Execute command

kubectl create -f /root/sample/nginx/deployment.yaml --kubeconfig /etc/karmada/karmada-apiserver.config
kubectl get deployment  --kubeconfig /etc/karmada/karmada-apiserver.config 

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7.3 Create PropagationPolicy that will propagate nginx to member cluster

propagationpolicy.yaml  are obtained through here https://github.com/karmada-io/karmada/tree/master/samples/nginx

Execute command

kubectl create -f /root/sample/nginx/propagationpolicy.yaml --kubeconfig /etc/karmada/karmada-apiserver.config

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Uninstall Guide

Troubleshooting

1. Network problem: the working cluster uses the default communication mode of calico, and the access between nodes is blocked; After many attempts, calico vxlan is feasible and flannel is feasible at present;

2. Disaster recovery scenario scheduling, test scenario 2, requires the karmada control plane to install the deschedule component;

Maintenance

• Blue Print Package Maintenance

  • Software maintenance： N/A 
  • Hardware maintenance：N/A

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