Merge pull request #13 from zufardhiyaulhaq/v1.21.7

upgrade to v1.21.7

README.md

@@ -1,9 +1,9 @@
 # Kubernetes Hard Way Ansible
 Ansible template to create kubernetes cluster with the following specs:
-* Kubernetes v1.20.12
+* Kubernetes v1.21.7
 * Flannel v0.15.1
 * CNI v1.0.1
-* CRI v1.20.0
+* CRI v1.21.0
 * runc v1.0.2
 * containerd v1.5.8
 * gvisor 20211122

group_vars/all.yml

@@ -16,7 +16,7 @@ kubernetes:
       ### add IP or domain with comma separated
       additionalIP: "172.16.0.1,172.16.0.2,kubernetes.zufar.io"
     cri:
-      version: v1.20.0
+      version: v1.21.0
     cni:
       version: v1.0.1
     etcd:
@@ -78,7 +78,7 @@ kubernetes:
     directory: /home/vagrant/kubernetes-certificate
   ### number of Kubernetes master
   masterNumber: 3
-  version: v1.20.12
+  version: v1.21.7
 
 ### Infrastructure configuration
 infrastructure:

upgrade-kubernetes.md

@@ -1,5 +1,43 @@
 # Upgrade Kubernetes
 
+### Upgrade from v1.20.12 to v1.21.7
+
+#### Upgrade step
+* SSH to deployer node
+```bash
+ssh [email protected]
+```
+
+* Go to `kubernetes-hardway-ansible` directory, checkout to master
+```
+git fetch --all
+git checkout --track origin/v1.21.7
+```
+
+* Adjust variable in the group_vars
+```
+vi group_vars/all.yml
+```
+
+* Adjust Kubernetes host and nodes
+```
+vi hosts/hosts
+```
+
+* Run ansible
+```
+ansible-playbook upgrade-kubernetes.yml -i hosts/hosts
+```
+
+* Verify version
+```
+kubectl version
+kubectl get nodes
+
+kubectl describe deployment coredns --namespace kube-system | grep Image
+kubectl get daemonset kube-flannel-ds --namespace kube-system -o=jsonpath='{$.spec.template.spec.containers[:1].image}'
+```
+
 ### Upgrade from v1.19.10 to 1.20.12
 
 Please note that upgrading from v1.19.10 to v1.20.12 will also upgrade flannel, coredns, and metrics-server. Please test in staging or testing cluster before upgrading.

upgrade-kubernetes.yml

@@ -3,6 +3,7 @@
 ##############################
 
 - name: Cordon kubernetes worker
+  become: yes
   hosts: master
   roles:
     - upgrade-kubernetes-cordon