Current state

bootstrap/README.md

@@ -2,10 +2,15 @@
 
 The following lines document how to initalize a fresh cluster. On a real cluster, or using Vagrant. It therefore assumes to clone kubespray to this folder. It will be excluded in *.gitignore* and all files are in this folder.
 
+Use [kubespray tag](https://github.com/kubernetes-sigs/kubespray/releases) as parameter
+
+```sh
+./init.sh "release-2.12"
+```
+
 ## Vagrant
 
 ```sh
-./init.sh
 cd kubespray
 vagrant up
 # up and abkle to ssh
@@ -22,10 +27,11 @@ ssh centos@<ip>
 sudo su - root
 adduser moritz
 visudo # add as sudo user
+su - moritz
 sudo yum -y install vim python3
 ssh-keygen
 vim .ssh/authorized_users # paste key
-chmod 644 .ssh/authorized_users
+chmod 644 .ssh/authorized_keys
 # check whether login works with ssh key
 sudo vim /etc/ssh/sshd_config # remove pw auth & root login
 sudo yum upgrade -y && sudo reboot
@@ -37,7 +43,7 @@ Install Kubernetes:
 $ ./init.sh
 $ # follow instructions from output, sth like:
 $ cd kubespray                                                                                                                                          │nginx-ingress-default-backend-5b967cf596-sk7p7   1/1     Running   0          22h
-$ ansible-playbook -i inventory/prod/inventory.ini cluster.yml    
+$ ansible-playbook -i inventory/prod/inventory.ini cluster.yml
 ```
 
 And get credentials:
@@ -54,4 +60,34 @@ kubectl get ns # test connection
 scp haumdaucher.de:/home/moritz/.kube/config .kube/config
 ```
 
-Foreward in k8s-directory.
+Foreward in k8s-directory.
+
+## Upgrade cluster
+
+Check the current default value of `kube_version` in cloned repository.
+
+```sh
+cd kubespray
+ansible-playbook -i inventory/prod/inventory.ini -e kube_version=v1.16.8 -e upgrade_cluster_setup=true cluster.yml
+```
+
+History:
+
+* 2020-04-18 kube_version=v1.16.8 kubespray_branch=release-2.12
+
+## Add node
+
+See [documentation](https://github.com/kubernetes-sigs/kubespray/blob/master/docs/nodes.md).
+
+Note: This was more or less a trial and error approach. Running different playbooks over and over again got it right at some point.
+
+```sh
+ansible-playbook -i inventory/prod/inventory.ini --limit=ns3088070.ip-37-59-40.eu,ns3100058.ip-37-59-61.eu scale.yml
+ansible-playbook -i inventory/prod/inventory.ini --limit=etcd,kube-master -e ignore_assert_errors=yes cluster.yml
+```
+
+This runs everything and is kind of idempotent:
+
+```sh
+ansible-playbook -i inventory/prod/inventory.ini cluster.yml
+```