Use RKE to install Kubernetes with a high availability etcd configuration.
Note: For systems without direct internet access see Air Gap: High Availability Install for install details.
Using the sample below create the
rancher-cluster.yml file. Replace the IP Addresses in the
nodes list with the IP address or DNS names of the 3 nodes you created.
Note: If your node has public and internal addresses, it is recommended to set the
internal_address:so Kubernetes will use it for intra-cluster communication. Some services like AWS EC2 require setting the
internal_address:if you want to use self-referencing security groups or firewalls.
nodes: - address: 184.108.40.206 internal_address: 172.16.22.12 user: ubuntu role: [controlplane,worker,etcd] - address: 220.127.116.11 internal_address: 172.16.32.37 user: ubuntu role: [controlplane,worker,etcd] - address: 18.104.22.168 internal_address: 172.16.42.73 user: ubuntu role: [controlplane,worker,etcd] services: etcd: snapshot: true creation: 6h retention: 24h
Common RKE Nodes Options
||yes||The public DNS or IP address|
||yes||A user that can run docker commands|
||yes||List of Kubernetes roles assigned to the node|
||no||The private DNS or IP address for internal cluster traffic|
||no||Path to SSH private key used to authenticate to the node (defaults to
RKE has many configuration options for customizing the install to suit your specific environment.
Please see the RKE Documentation for the full list of options and capabilities.
For tuning your etcd cluster for larger Rancher installations see the etcd settings guide.
rke up --config ./rancher-cluster.yml
When finished, it should end with the line:
Finished building Kubernetes cluster successfully.
Testing Your Cluster
RKE should have created a file
kube_config_rancher-cluster.yml. This file has the credentials for
Note: If you have used a different file name from
rancher-cluster.yml, then the kube config file will be named
You can copy this file to
$HOME/.kube/config or if you are working with multiple Kubernetes clusters, set the
KUBECONFIG environmental variable to the path of
Test your connectivity with
kubectl and see if all your nodes are in
kubectl get nodes NAME STATUS ROLES AGE VERSION 22.214.171.124 Ready controlplane,etcd,worker 11m v1.13.5 126.96.36.199 Ready controlplane,etcd,worker 11m v1.13.5 188.8.131.52 Ready controlplane,etcd,worker 11m v1.13.5
Check the Health of Your Cluster Pods
Check that all the required pods and containers are healthy are ready to continue.
- Pods are in
READYcolumn shows all the containers are running (i.e.
3/3) for pods with
- Pods with
Completedare run-once Jobs. For these pods
kubectl get pods --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGE ingress-nginx nginx-ingress-controller-tnsn4 1/1 Running 0 30s ingress-nginx nginx-ingress-controller-tw2ht 1/1 Running 0 30s ingress-nginx nginx-ingress-controller-v874b 1/1 Running 0 30s kube-system canal-jp4hz 3/3 Running 0 30s kube-system canal-z2hg8 3/3 Running 0 30s kube-system canal-z6kpw 3/3 Running 0 30s kube-system kube-dns-7588d5b5f5-sf4vh 3/3 Running 0 30s kube-system kube-dns-autoscaler-5db9bbb766-jz2k6 1/1 Running 0 30s kube-system metrics-server-97bc649d5-4rl2q 1/1 Running 0 30s kube-system rke-ingress-controller-deploy-job-bhzgm 0/1 Completed 0 30s kube-system rke-kubedns-addon-deploy-job-gl7t4 0/1 Completed 0 30s kube-system rke-metrics-addon-deploy-job-7ljkc 0/1 Completed 0 30s kube-system rke-network-plugin-deploy-job-6pbgj 0/1 Completed 0 30s
Save Your Files
Important The files mentioned below are needed to maintain, troubleshoot and upgrade your cluster.
Save a copy of the following files in a secure location:
rancher-cluster.yml: The RKE cluster configuration file.
kube_config_rancher-cluster.yml: The Kubeconfig file for the cluster, this file contains credentials for full access to the cluster.
rancher-cluster.rkestate: The Kubernetes Cluster State file, this file contains credentials for full access to the cluster.
The Kubernetes Cluster State file is only created when using RKE v0.2.0 or higher.
Issues or errors?
See the Troubleshooting page.