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istio.md: patch deployment with istio-gateway

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Marcello de Sales 2020-01-16 21:25:25 -08:00 committed by Marcello de Sales
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docs/tutorials/istio.md
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@ -4,7 +4,12 @@ It is meant to supplement the other provider-specific setup tutorials.
**Note:** Using the Istio Gateway source requires Istio >=1.0.0.
* Manifest (for clusters without RBAC enabled)
* Manifest (for clusters with RBAC enabled)
* Update existing Existing DNS Deployment
### Manifest (for clusters without RBAC enabled)
```yaml
apiVersion: apps/v1
kind: Deployment
@ -108,7 +113,22 @@ spec:
- --txt-owner-id=my-identifier
```
### Update existing Existing DNS Deployment
* For clusters with running `external-dns`, you can just update the deployment.
* With access to the `kube-system` namespace, update the existing `external-dns` deployment.
* Add a parameter to the arguments of the container to create dns entries with `--source=istio-gateway`.
Execute the following command or update the argument.
```console
kubectl patch deployment external-dns --type='json' \
-p='[{"op": "add", "path": "/spec/template/spec/containers/0/args/2", "value": "--source=istio-gateway" }]'
deployment.extensions/external-dns patched
```
### Verify External DNS works (Gateway example)
Follow the [Istio ingress traffic tutorial](https://istio.io/docs/tasks/traffic-management/ingress/)
to deploy a sample service that will be exposed outside of the service mesh.
The following are relevant snippets from that tutorial.