Name: kubernetes-ostack
Owner: EMBL-EBI Technology & Science Integration
Description: Kubernetes on EMBASSY Openstack
Created: 2018-04-06 14:28:37.0
Updated: 2018-04-06 14:30:26.0
Pushed: 2018-04-06 14:30:26.0
Homepage: null
Size: 6479
Language: HCL
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A Terraform + Ansible combo to install a basic kubernetes setup on the EMBASSY openstack cloud.
Copy terraform/tfvars.example to terraform/terraform.tfvars and edit to your liking. Then run:
terraform apply and confirm when prompted.
If everything has deployed successfully, cd into the ansible directory and run:
ansible-playbook -i inventory.ini -u centos cluster.yml
By default this playbook installs Kubernetes 1.9 with docker 1.12, however modify the versions.yml file to adjust this. The playbook also uses Weave as a network plugin.
SSH into your master node and run kubectl get pods --all-namespaces to check everything is ok, you should see something similar to this:
tos@k8s-basic-test-master ~]$ kubectl get pods --all-namespaces
SPACE NAME READY STATUS RESTARTS AGE
-system etcd-k8s-basic-test-master 1/1 Running 0 1m
-system kube-apiserver-k8s-basic-test-master 1/1 Running 0 1m
-system kube-controller-manager-k8s-basic-test-master 1/1 Running 0 2m
-system kube-dns-6f4fd4bdf-d4s2c 3/3 Running 0 2m
-system kube-proxy-f2792 1/1 Running 0 2m
-system kube-proxy-mvs9x 1/1 Running 0 2m
-system kube-proxy-zdhzf 1/1 Running 0 2m
-system kube-scheduler-k8s-basic-test-master 1/1 Running 0 2m
-system weave-net-2khj6 2/2 Running 1 2m
-system weave-net-cbwbt 2/2 Running 0 2m
-system weave-net-pgmzm 2/2 Running 1 2m
Take special care if your weave or dns pods have a high number of restarts or are in an error state, this indicates networking issues. Re-check your terraform ip setup and/or try a different network adapter for Kubernetes as described here.