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l1ahim/readme.sh

Created September 3, 2020 13:21
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Rancher k3s installation and group configuration
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readme.md

API server: nodes should be able to reach k3s server tcp port 6443

flannel vxlan: udp port 8472 for nodes to communicate (server and agents)

metrics server: it collects resource metrics from kubelets and exposes them in k8s api server through metrics api. tcp port 10250

https://rancher.com/docs/k3s/latest/en/installation/install-options/

run the installation script

curl -sfL https://get.k3s.io | sh -

create k3s group and add user to avoid using always sudo

sudo groupadd k3s sudo usermod -aG k3s $USER sudo chown root:k3s /etc/rancher/k3s/k3s.yaml sudo chmod 740 /etc/rancher/k3s/k3s.yaml

node configuration using the agent

the token can be found on control server at: /var/lib/rancher/k3s/server/node-token

curl -sfL https://get.k3s.io | K3S_URL=https://k3sserver:6443 K3S_TOKEN=mynodetoken sh -

create test pod

cat < podtemplate.yaml apiVersion: v1 kind: Pod metadata: name: cowfortune spec: containers: - name: funbox-cow image: wernight/funbox command: ["fortune | cowsay"] EOF

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