apisix/kubernetes/README.md

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### Kubernetes
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There are some yaml files for deploying apisix in Kubernetes.
**Note: You can also install Apache APISIX in Kubernetes by [Helm Chart](https://github.com/apache/apisix-helm-chart).**
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### Prerequisites
- use `etcd`, if there is no `etcd` service, please install and set etcd address in `../conf/config.yaml`
### Usage
#### Create configmap for apache apisix
if you do not need to change any config, and use default config in `../conf/config.yaml`
```
$ kubectl create configmap apisix-gw-config.yaml --from-file=../conf/config.yaml
```
#### When using etcd-operator
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when using etcd-operator, you need to change `apisix-gw-config-cm.yaml`:
* add CoreDNS IP into dns_resolver
```
dns_resolver:
- 10.233.0.3 # default coreDNS cluster ip
```
* change etcd host
Following {your-namespace} should be changed to your namespace, for example `default`.
> Mention: must use `Full Qualified Domain Name`. Short name `etcd-cluster-client` is not work.
```
etcd:
host:
- "http://etcd-cluster-client.{your-namespace}.svc.cluster.local:2379" # multiple etcd address
```
#### Create deployment for apache apisix
```
$ kubectl apply -f deployment.yaml
```
#### Create service for apache apisix
```
$ kubectl apply -f service.yaml
```
#### Scale apache apisix
```
$ kubectl scale deployment apisix-gw-deployment --replicas=4
```
#### Check running status
```
$ kubectl get cm | grep -i apisix
apisix-gw-config.yaml 1 1d
$ kubectl get pod | grep -i apisix
apisix-gw-deployment-68df7c7578-5pvxb 1/1 Running 0 1d
apisix-gw-deployment-68df7c7578-kn89l 1/1 Running 0 1d
apisix-gw-deployment-68df7c7578-i830r 1/1 Running 0 1d
apisix-gw-deployment-68df7c7578-32ow1 1/1 Running 0 1d
$ kubectl get svc | grep -i apisix
apisix-gw-svc LoadBalancer 172.19.33.28 10.253.0.11 80:31141/TCP,443:30931/TCP 1d
```
#### Clean up (dangerous)
```
kubectl delete -f .
```