Moving bootstrap_hetzner to bootstrap dir

2020-12-26 09:48:52 +01:00
parent 9cb8831f01
commit 9f4d7f8043
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+# Bootstrap
+
+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-2.14"
+```
+
+See [kubespray.io](https://kubespray.io/) oj detailed information about kubespray. Though it seems to be a littlebit outdated.
+
+## Vagrant
+
+```sh
+cd kubespray
+vagrant up
+# up and abkle to ssh
+vagrant ssh k8s-1
+```
+
+## Prod
+
+Prepare server:
+* deactivate swap!
+* `moritz username     ALL=(ALL) NOPASSWD:ALL`
+* `
+
+```sh
+ssh centos@<ip>
+# auth via pw
+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_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
+```
+
+Install Kubernetes:
+
+```sh
+. ./init.sh
+# follow instructions from output, sth like:
+cd kubespray
+ansible-playbook -i inventory/prod/inventory.ini cluster.yml
+```
+
+And get credentials:
+
+```sh
+ssh <ip>
+sudo su - root
+cd
+cp -r .kube /home/moritz/
+chown -R moritz. /home/moritz/.kube
+#ctrl + d
+kubectl get ns # test connection
+#ctrl + d
+scp haumdaucher.de:/home/moritz/.kube/config .kube/config
+```
+
+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=v1.19.4 -e upgrade_cluster_setup=true cluster.yml
+# or just the newest version
+ansible-playbook -i inventory/prod/inventory.ini -e upgrade_cluster_setup=true cluster.yml
+# upgrade to specific calico version (did not trigger/ failed)
+ansible-playbook -i inventory/prod/inventory.ini -e upgrade_cluster_setup=true -e calico_version=v3.15.2 cluster.yml --tags=network
+```
+
+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
+```
+