148 lines
5.6 KiB
Markdown
148 lines
5.6 KiB
Markdown
# Kubernetes
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## Setup Kubernetes EasyHAProxy
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EasyHAProxy for Kubernetes queries all ingress definitions with the annotation `kubernetes.io/ingress.class: easyhaproxy-ingress`. Once find the annotation, it will immediately set up HAProxy and start to serve it.
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There are three installation modes:
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- DaemonSet: It will expose ports 80, 443 and 1936
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- NodePort: It will expose the ports 31080, 31443 and 31936
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- ClusterIP: it will node expose any port. The HAProxy will be accessible only inside the cluster.
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To install EasyHAProxy in your cluster, follow these steps:
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### 1) Identify the node where your EasyHAProxy container will run
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EasyHAProxy will be limited to a single node. To understand that see [limitations](limitations.md) page.
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```bash
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$ kubectl get nodes
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NAME STATUS ROLES AGE VERSION
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node-01 Ready <none> 561d v1.21.13-3
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node-02 Ready <none> 561d v1.21.13-3
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```
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Add the EasyHAProxy label to the node.
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```bash
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kubectl label nodes node-01 "easyhaproxy/node=master"
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```
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### 2) Install EasyHAProxy with Kubernetes Manifest
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```bash
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kubectl create namespace easyhaproxy
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kubectl apply -f \
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https://raw.githubusercontent.com/byjg/docker-easy-haproxy/4.3.1-rc1/deploy/kubernetes/easyhaproxy-daemonset.yml
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```
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If necessary, you can configure environment variables. To get a list of the variables, please follow the [docker container environment](docker-environment.md)
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## Running containers
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Your container only requires creating an ingress with the annotation `kubernetes.io/ingress.class: easyhaproxy-ingress` pointing to your service.
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e.g.
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```yaml
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kind: Ingress
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metadata:
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annotations:
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kubernetes.io/ingress.class: easyhaproxy-ingress
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name: example-ingress
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namespace: example
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spec:
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rules:
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- host: example.org
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http:
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paths:
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- backend:
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service:
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name: example-service
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port:
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number: 8080
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pathType: ImplementationSpecific
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```
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Once the container is running, EasyHAProxy will detect automatically and start to redirect all traffic from `example.org:80` to your container at port 8080.
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You don't need to expose any port in your container.
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Notes:
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- At this point, the implementation doesn't support all ingress properties or wildcard domains.
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- The ingress will publish the ports 80 and 443, plus 1936 if stats are enabled.
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- EasyHAProxy will read all `spec.rules[].host` spec, however it will parse only the first path `spec.rules[].http.paths[0].port.number` for each rule, and ignore the other paths.
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## Kubernetes annotations
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| annotation | Description | Default | Example |
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|----------------------------------|-----------------------------------------------------------------------------------------|--------------|---------------------------------------|
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| kubernetes.io/ingress.class | (required) Activate EasyHAProxy. | **required** | easyhaproxy-ingress |
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| easyhaproxy.redirect_ssl | (optional) Boolean. Force redirect all endpoints to HTTPS. | false | true or false |
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| easyhaproxy.letsencrypt | (optional) Boolean. It will request letsencrypt certificates for the ingresses domains. | false | true or false |
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| easyhaproxy.redirect | (optional) JSON. Key pair with a domain and its destination. | *empty* | {"domain":"redirect_url"} |
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| easyhaproxy.mode | (optional) Set the HTTP mode for that connection. | http | http or tcp |
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| easyhaproxy.listen_port | (optional) Set the an additional port for that ingress | http | http or tcp |
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| easyhaproxt.logLevel.certbot | (optional) Certbot log level | DEBUG | TRACE,DEBUG,INFO,WARN,ERROR or FATAL |
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| easyhaproxt.logLevel.eashhaproxy | (optional) EasyHAProxy log level | DEBUG | TRACE,DEBUG,INFO,WARN,ERROR or FATAL |
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| easyhaproxt.logLevel.haproxy | (optional) HAProxy log level | INFO | TRACE,DEBUG,INFO,WARN,ERROR or FATAL |
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**Important**: The annotations are per ingress and applied to all hosts in that ingress configuration.
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## Letsencrypt
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It is necessary add the annotation `easyhaproxy.letsencrypt` to the ingress configuration:
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```yaml
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kind: Ingress
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metadata:
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annotations:
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kubernetes.io/ingress.class: easyhaproxy-ingress
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easyhaproxy.letsencrypt: 'true'
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name: example-ingress
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namespace: example
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spec:
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....
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```
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Make sure your cluster is accessible both through ports 80 and 443.
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## Custom SSL Certificates
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Create a secret with your certificate and key and associate them with your ingress.
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```yaml
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---
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apiVersion: v1
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kind: Secret
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metadata:
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name: host2-tls
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namespace: default
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data:
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tls.crt: base64 of your certificate
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tls.key: base64 of your certificate private key
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type: kubernetes.io/tls
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---
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apiVersion: networking.k8s.io/v1
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kind: Ingress
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metadata:
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annotations:
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kubernetes.io/ingress.class: easyhaproxy-ingress
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name: tls-example
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namespace: default
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spec:
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tls:
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- hosts:
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- host2.local
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secretName: host2-tls
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rules:
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...
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```
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----
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[Open source ByJG](http://opensource.byjg.com)
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