This explains how to configure cluster-api-provider-openstack to use a Service of LoadBalancer type on Cloud Provider OpenStack.
OpenStack Octavia intallation is based on Installing OpenStack Octavia Stein release on Ubuntu 18.04 manually .
Configure
Cloud Provider OpenStack configuration is defined in the generate-yaml.sh file. You must add LoadBalancer section to the OPENSTACK_CLOUD_PROVIDER_CONF_PLAIN environment variable value like the following. By adding this, the /etc/kubernetes/cloud.conf file in the master node will be updated.
# Basic cloud.conf, no LB configuration as that data is not known yet.
OPENSTACK_CLOUD_PROVIDER_CONF_PLAIN="[Global]
auth-url=$AUTH_URL
username=\"$USERNAME\"
password=\"$PASSWORD\"
region=\"$REGION\"
tenant-id=\"$PROJECT_ID\"
domain-name=\"$DOMAIN_NAME\"
[LoadBalancer]
lb-version=v2
use-octavia=true
floating-network-id=5f11f552-7254-47ac-bda3-e8c03b1443cd
create-monitor=true
monitor-delay=60s
monitor-timeout=30s
monitor-max-retries=5
"
After creating a Kubernetes cluster by cluster-api-provider-openstack, login to the master node and check /etc/kubernetes/cloud.conf file that LoadBalancer section was added.
ubuntu@openstack-master-xmd6r:~$ sudo cat /etc/kubernetes/cloud.conf
[Global]
auth-url=http://<controller>:5000/
username="demo"
password="<password>""
region="RegionOne"
tenant-id="<tenant-id>"
domain-name="Default"
[LoadBalancer]
lb-version=v2
use-octavia=true
floating-network-id=<floating-network-id>
create-monitor=true
monitor-delay=60s
monitor-timeout=30s
monitor-max-retries=5
Testing deployment
This is based on Exposing applications using services of LoadBalancer type
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ kubectl --kubeconfig=kubeconfig run echoserver --image=gcr.io/google-containers/echoserver:1.10 --port=8080
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
deployment.apps/echoserver created
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ kubectl --kubeconfig=kubeconfig get deploy
NAME READY UP-TO-DATE AVAILABLE AGE
echoserver 1/1 1 1 29s
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ cat <<EOF > loadbalancer.yaml
> ---
> kind: Service
> apiVersion: v1
> metadata:
> name: loadbalanced-service
> spec:
> selector:
> run: echoserver
> type: LoadBalancer
> ports:
> - port: 80
> targetPort: 8080
> protocol: TCP
> EOF
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ cat loadbalancer.yaml
---
kind: Service
apiVersion: v1
metadata:
name: loadbalanced-service
spec:
selector:
run: echoserver
type: LoadBalancer
ports:
- port: 80
targetPort: 8080
protocol: TCP
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ kubectl --kubeconfig=kubeconfig apply -f loadbalancer.yaml
service/loadbalanced-service created
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ kubectl --kubeconfig=kubeconfig get service loadbalanced-service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
loadbalanced-service LoadBalancer 10.100.237.171 <pending> 80:31500/TCP 22s
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ kubectl --kubeconfig=kubeconfig get service loadbalanced
-service -w
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
loadbalanced-service LoadBalancer 10.100.237.171 <pending> 80:31500/TCP 29s
loadbalanced-service LoadBalancer 10.100.237.171 10.0.0.228 80:31500/TCP 47s
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$ curl 10.0.0.228
Hostname: echoserver-785b4d845-dgr9p
Pod Information:
-no pod information available-
Server values:
server_version=nginx: 1.13.3 - lua: 10008
Request Information:
client_address=172.16.1.126
method=GET
real path=/
query=
request_version=1.1
request_scheme=http
request_uri=http://10.0.0.228:8080/
Request Headers:
accept=*/*
host=10.0.0.228
user-agent=curl/7.58.0
Request Body:
-no body in request-
ubuntu@k8s:~/go/src/sigs.k8s.io/cluster-api-provider-openstack/cmd/clusterctl$