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Dominik Chilla 2020-08-23 20:43:50 +02:00
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@ -1,4 +1,4 @@
# snippets for k3s # Snippets for k3s
* [Install k3s](#install-k3s) * [Install k3s](#install-k3s)
* [Disable Traefik-ingress](#disable-traefik-ingress) * [Disable Traefik-ingress](#disable-traefik-ingress)
@ -6,7 +6,8 @@
* [Installation](#install-nginx-ingress) * [Installation](#install-nginx-ingress)
* [Change service type from NodePort to LoadBalancer](#nginx-ingress-loadbalancer) * [Change service type from NodePort to LoadBalancer](#nginx-ingress-loadbalancer)
* [Enable nginx-ingress tcp- and udp-services for apps other than http/s](#nginx-ingress-tcp-udp-enabled) * [Enable nginx-ingress tcp- and udp-services for apps other than http/s](#nginx-ingress-tcp-udp-enabled)
* [Deploy my-nginx-service and expose via nginx-ingress on TCP-port 9000](#deploy-and-expose-tcp-service) * [Enable client-IP transparency and expose TCP-port 9000](#enable-client-ip-transp-expose-tcp-9000)
* [Deploy my-nginx-service][#deploy-my-nginx-service]
* [Stick the nginx-ingress controler and my-nginx app together](#stick-nginx-ingress-and-tcp-service) * [Stick the nginx-ingress controler and my-nginx app together](#stick-nginx-ingress-and-tcp-service)
* [Test exposed app on TCP-port 9000](#test-nginx-ingress-and-tcp-service) * [Test exposed app on TCP-port 9000](#test-nginx-ingress-and-tcp-service)
@ -87,7 +88,45 @@ spec:
[...] [...]
``` ```
### Deploy my-nginx-service and expose via nginx-ingress on TCP-port 9000 <a name="deploy-and-expose-tcp-service"></a> ## Enable client-IP transparency and expose TCP-port 9000 <a name="enable-client-ip-transp-expose-tcp-9000"></a>
Enable client-IP transparency and expose my-nginx app on nginx-ingress TCP-port 9000: `kubectl edit service -n ingress-nginx`
Find the `ports:`-section of the `ingress-nginx-controller` service and *ADD* the definition for port 9000:
```
[...]
spec:
clusterIP: 10.43.237.255
>>> CHANGE externalTrafficPolicy from Cluster to Local if original client-IP is desirable
externalTrafficPolicy: Local
<<< CHANGE
ports:
- name: http
nodePort: 30312
port: 80
protocol: TCP
targetPort: http
- name: https
nodePort: 30366
port: 443
protocol: TCP
targetPort: https
>>> ADD
- name: proxied-tcp-9000
port: 9000
protocol: TCP
targetPort: 9000
<<< ADD
[...]
```
Verify nginx-ingress is listening on port 9000 with `kubectl get all --all-namespaces`:
```
[...]
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
[...]
ingress-nginx service/ingress-nginx-controller LoadBalancer 10.43.237.255 10.62.94.246 80:30312/TCP,443:30366/TCP,9000:31460/TCP 71m
[...]
```
### Deploy my-nginx-service <a name="deploy-my-nginx-service"></a>
my-nginx-deployment.yml: my-nginx-deployment.yml:
``` ```
apiVersion: apps/v1 apiVersion: apps/v1
@ -127,7 +166,6 @@ Apply with `kubectl apply -f my-nginx-deployment.yml`:
``` ```
deployment.apps/my-nginx created deployment.apps/my-nginx created
service/my-nginx created service/my-nginx created
configmap/tcp-services created
``` ```
Test: `kubectl get all`: Test: `kubectl get all`:
``` ```
@ -137,42 +175,6 @@ NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/my-nginx ClusterIP 10.43.118.13 <none> 80/TCP 99s service/my-nginx ClusterIP 10.43.118.13 <none> 80/TCP 99s
[...] [...]
``` ```
Enable client-IP transparency and expose my-nginx app on nginx-ingress TCP-port 9000: `kubectl edit service -n ingress-nginx`
Find the `ports:`-section of the `ingress-nginx-controller` service and *ADD* the definition for port 9000:
```
[...]
spec:
clusterIP: 10.43.237.255
>>> CHANGE externalTrafficPolicy from Cluster to Local if original client-IP is desirable
externalTrafficPolicy: Local
<<< CHANGE
ports:
- name: http
nodePort: 30312
port: 80
protocol: TCP
targetPort: http
- name: https
nodePort: 30366
port: 443
protocol: TCP
targetPort: https
>>> ADD
- name: proxied-tcp-9000
port: 9000
protocol: TCP
targetPort: 9000
<<< ADD
[...]
```
Verify nginx-ingress is listening on port 9000 with `kubectl get all --all-namespaces`:
```
[...]
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
[...]
ingress-nginx service/ingress-nginx-controller LoadBalancer 10.43.237.255 10.62.94.246 80:30312/TCP,443:30366/TCP,9000:31460/TCP 71m
[...]
```
## Stick the nginx-ingress controler and my-nginx app together <a name="stick-nginx-ingress-and-tcp-service"></a> ## Stick the nginx-ingress controler and my-nginx app together <a name="stick-nginx-ingress-and-tcp-service"></a>
Finally, the nginx-ingress controller needs a port-mapping pointing to the my-nginx app. This will be done with the config-map `tcp-services-config-map.yml`, referenced earlier in the nginx-ingress deployment definition: Finally, the nginx-ingress controller needs a port-mapping pointing to the my-nginx app. This will be done with the config-map `tcp-services-config-map.yml`, referenced earlier in the nginx-ingress deployment definition: