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Add notes to the kubernetes install docs regarding source IPs

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Note how to add the annotation for preserving the IPs, and note the
requirement to run your ingress controllers using a daemonset in GKE.
This commit is contained in:
DJ Mountney 2017-05-24 16:07:30 -07:00
parent 54fe9a1e7d
commit dce1ec07e9
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doc/install/kubernetes/gitlab_chart.md
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@ -206,9 +206,43 @@ its class in an annotation.
>**Note:**
The Ingress alone doesn't expose GitLab externally. You need to have a Ingress controller setup to do that.
Setting up an Ingress controller can be as simple as installing the `nginx-ingress` helm chart. But be sure
Setting up an Ingress controller can be done by installing the `nginx-ingress` helm chart. But be sure
to read the [documentation](https://github.com/kubernetes/charts/blob/master/stable/nginx-ingress/README.md)
#### Preserving Source IPs
If you are using the `LoadBalancer` serviceType you may run into issues where user IP addresses in the GitLab
logs, and used in abuse throttling are not accurate. This is due to how Kubernetes uses source NATing on cluster nodes without endpoints.
See the [Kubernetes documentation](https://kubernetes.io/docs/tutorials/services/source-ip/#source-ip-for-services-with-typeloadbalancer) for more information.
To fix this you can add the following service annotation to your `values.yaml`
```yaml
## For minikube, set this to NodePort, elsewhere use LoadBalancer
## ref: http://kubernetes.io/docs/user-guide/services/#publishing-services---service-types
##
serviceType: LoadBalancer
## Optional annotations for gitlab service.
serviceAnnotations:
service.beta.kubernetes.io/external-traffic: "OnlyLocal"
```
>**Note:**
If you are using the ingress routing, you will likely also need to specify the annotation on the service for the ingress
controller. For `nginx-ingress` you can check the
[configuration documentation](https://github.com/kubernetes/charts/blob/master/stable/nginx-ingress/README.md#configuration)
on how to add the annotation to the `controller.service.annotations` array.
>**Note:**
When using the `nginx-ingress` controller on Google Container Engine (GKE), and using the `external-traffic` annotation,
you will need to additionally set the `controller.kind` to be DaemonSet. Otherwise only pods running on the same node
as the nginx controller will be able to reach GitLab. This may result in pods within your cluster not being able to reach GitLab.
See the [Kubernetes documentation](https://kubernetes.io/docs/tutorials/services/source-ip/#source-ip-for-services-with-typeloadbalancer) and
[nginx-ingress configuration documentation](https://github.com/kubernetes/charts/blob/master/stable/nginx-ingress/README.md#configuration)
for more information.
### External database
You can configure the GitLab Helm chart to connect to an external PostgreSQL