Kubertnetes : Install KubeVir

Install KubeVirt to deploy fully virtualized virtual machines in Kubernetes Cluster. This example is based on the environment like follows. +----------------------+ +----------------------+ | [ ctrl.srv.world ] | | [ dlp.srv.world ] | | Manager Node | | Control Plane | +-----------+----------+ +-----------+----------+ eth0|10.0.0.25 eth0|10.0.0.30 | | ------------+--------------------------+----------- | | eth0|10.0.0.51 eth0|10.0.0.52 +-----------+----------+ +-----------+----------+ | [ node01.srv.world ] | | [ node02.srv.world ] | | Worker Node#1 | | Worker Node#2 | +----------------------+ +----------------------+

[1]	Install KubeVirt and virtctl command.

root@ctrl:~#  export VERSION=$(curl https://storage.googleapis.com/kubevirt-prow/release/kubevirt/kubevirt/stable.txt) root@ctrl:~#  wget https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-operator.yaml root@ctrl:~#  wget https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-cr.yaml root@ctrl:~#  wget https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/virtctl-${VERSION}-linux-amd64 root@ctrl:~#  mv virtctl-${VERSION}-linux-amd64 /usr/local/bin/virtctl root@ctrl:~#  chmod 755 /usr/local/bin/virtctl root@ctrl:~#  kubectl apply -f kubevirt-operator.yaml namespace/kubevirt created customresourcedefinition.apiextensions.k8s.io/kubevirts.kubevirt.io created priorityclass.scheduling.k8s.io/kubevirt-cluster-critical created clusterrole.rbac.authorization.k8s.io/kubevirt.io:operator created serviceaccount/kubevirt-operator created role.rbac.authorization.k8s.io/kubevirt-operator created rolebinding.rbac.authorization.k8s.io/kubevirt-operator-rolebinding created clusterrole.rbac.authorization.k8s.io/kubevirt-operator created clusterrolebinding.rbac.authorization.k8s.io/kubevirt-operator created deployment.apps/virt-operator created root@ctrl:~#  kubectl apply -f kubevirt-cr.yaml kubevirt.kubevirt.io/kubevirt created # after a few minutes, the pods will start up as follows root@ctrl:~#  kubectl get pods -n kubevirt NAME READY STATUS RESTARTS AGE virt-api-dd4cc786-c8fjh 1/1 Running 0 4m10s virt-api-dd4cc786-cp64w 1/1 Running 0 4m10s virt-controller-b9bbc9458-4xrmb 1/1 Running 0 3m39s virt-controller-b9bbc9458-cphld 1/1 Running 0 3m39s virt-handler-5gtvq 1/1 Running 0 3m39s virt-handler-gtb9r 1/1 Running 0 3m39s virt-operator-7b7bbf7c6f-ctnqn 1/1 Running 0 8m3s virt-operator-7b7bbf7c6f-szd6d 1/1 Running 0 8m3s

[2]	Create a test VM and verify it works normally.

debian@ctrl:~$  wget https://raw.githubusercontent.com/kubevirt/kubevirt.github.io/master/labs/manifests/vm.yaml debian@ctrl:~$  kubectl apply -f vm.yaml virtualmachine.kubevirt.io/testvm created debian@ctrl:~$  kubectl get vms NAME AGE STATUS READY testvm 5s Stopped False # start VM debian@ctrl:~$  virtctl start testvm VM testvm was scheduled to start debian@ctrl:~$  kubectl get vms NAME AGE STATUS READY testvm 30s Running True debian@ctrl:~$  kubectl get vmi NAME AGE PHASE IP NODENAME READY testvm 28s Running 192.168.241.147 node02.srv.world True # connect to the console of VM debian@ctrl:~$  virtctl console testvm Successfully connected to testvm console. The escape sequence is ^] login as 'cirros' user. default password: 'gocubsgo'. use 'sudo' for root. testvm login: cirros Password: $ # to go back to the Host's console, push Ctrl + ] key # * same operation as virsh command debian@ctrl:~$ # connect to VM via ssh # user is 'cirros' and password is 'gocubsgo' debian@ctrl:~$  kubectl get pods NAME READY STATUS RESTARTS AGE virt-launcher-testvm-m9bnv 3/3 Running 0 70s debian@ctrl:~$  kubectl port-forward pod/virt-launcher-testvm-m9bnv 2220:22 & debian@ctrl:~$  ssh cirros@localhost -p 2220 Handling connection for 2220 The authenticity of host '[localhost]:2220 ([::1]:2220)' can't be established. ECDSA key fingerprint is SHA256:H3UfC2ZRrGP0sAMAw2axBunCK7Pfg32eDdt7YBHKigs. This key is not known by any other names. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '[localhost]:2220' (ECDSA) to the list of known hosts. cirros@localhost's password: $ $ uname -a Linux testvm 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:09:13 UTC 2016 x86_64 GNU/Linux $ cat /etc/os-release NAME=Buildroot VERSION=2015.05-g31af4e3-dirty ID=buildroot VERSION_ID=2015.05 PRETTY_NAME="Buildroot 2015.05" $ exit Connection to localhost closed. # stop VM debian@ctrl:~$  virtctl stop testvm VM testvm was scheduled to stop debian@ctrl:~$  kubectl get vms NAME AGE STATUS READY testvm 4m30s Stopped False # delete VM debian@ctrl:~$  kubectl delete vm testvm virtualmachine.kubevirt.io "testvm" deleted debian@ctrl:~$  kubectl get vms No resources found in default namespace.