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Moritz Graf
2020-04-18 23:49:09 +02:00
parent 2857921a2e
commit 5e6d0d0bfe
6 changed files with 210 additions and 44 deletions
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bootstrap/README.md
+40 -4
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@@ -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
```
bootstrap/init.sh
+4 -2
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@@ -2,12 +2,13 @@
echo "######################################################################################"
echo "## Reinit repository"
rm -rf kubespray
git clone https://github.com/kubernetes-sigs/kubespray.git
VERSION=${1:-release-2.12}
git clone --branch $VERSION https://github.com/kubernetes-sigs/kubespray.git
echo "######################################################################################"
echo "## Activating python3 venv"
VENVDIR=venv
virtualenv --python=/usr/bin/python3.7 $VENVDIR
virtualenv $VENVDIR
source $VENVDIR/bin/activate
pip install -r kubespray/requirements.txt
@@ -41,4 +42,5 @@ cp -r kubespray/inventory/sample kubespray/inventory/prod
rm kubespray/inventory/prod/inventory.ini
cp ./prod.ini kubespray/inventory/prod/inventory.ini
gsed -i "s/kube_network_plugin: .*/kube_network_plugin: flannel/" ./kubespray/inventory/prod/group_vars/k8s-cluster/k8s-cluster.yml
#echo 'calico_iptables_backend: "NFT"' >> ./kubespray/inventory/prod/group_vars/k8s-cluster/k8s-net-cluster.yml
gsed -i "s/metrics_server_enabled: .*/metrics_server_enabled: true/" ./kubespray/inventory/prod/group_vars/k8s-cluster/addons.yml
bootstrap/prod.ini
+7 -10
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@@ -3,6 +3,8 @@
# ## We should set etcd_member_name for etcd cluster. The node that is not a etcd member do not need to set the value, or can set the empty string value.
[all]
ns3032787.ip-91-121-84.eu ansible_host=91.121.84.190 etcd_member_name=etcd1 ansible_become=yes ansible_become_method=sudo ansible_python_interpreter=/usr/bin/python3
ns3088070.ip-37-59-40.eu ansible_host=37.59.40.95 etcd_member_name=etcd2 ansible_become=yes ansible_become_method=sudo ansible_python_interpreter=/usr/bin/python3
ns3100058.ip-37-59-61.eu ansible_host=37.59.61.198 etcd_member_name=etcd3 ansible_become=yes ansible_become_method=sudo ansible_python_interpreter=/usr/bin/python3
# node1 ansible_host=95.54.0.12 # ip=10.3.0.1 etcd_member_name=etcd1
# node2 ansible_host=95.54.0.13 # ip=10.3.0.2 etcd_member_name=etcd2
# node3 ansible_host=95.54.0.14 # ip=10.3.0.3 etcd_member_name=etcd3
@@ -15,22 +17,17 @@ ns3032787.ip-91-121-84.eu ansible_host=91.121.84.190 etcd_member_name=etcd1 ansi
[kube-master]
ns3032787.ip-91-121-84.eu
# node1
# node2
ns3088070.ip-37-59-40.eu
[etcd]
ns3032787.ip-91-121-84.eu
# node1
# node2
# node3
ns3088070.ip-37-59-40.eu
ns3100058.ip-37-59-61.eu
[kube-node]
ns3032787.ip-91-121-84.eu
# node2
# node3
# node4
# node5
# node6
ns3088070.ip-37-59-40.eu
ns3100058.ip-37-59-61.eu
[calico-rr]