87 lines
2.6 KiB
Markdown
87 lines
2.6 KiB
Markdown
|
|
# Ambassador
|
|
|
|
The [Ambassador API Gateway](https://github.com/datawire/ambassador) provides all the functionality of a traditional ingress controller
|
|
(e.g., path-based routing) while exposing many additional capabilities such as authentication,
|
|
URL rewriting, CORS, rate limiting, and automatic metrics collection.
|
|
|
|
## Installation
|
|
|
|
### Configuration
|
|
|
|
* `ingress_ambassador_namespace` (default `ambassador`): namespace for installing Ambassador.
|
|
* `ingress_ambassador_update_window` (default `0 0 * * SUN`): _crontab_-like expression
|
|
for specifying when the Operator should try to update the Ambassador API Gateway.
|
|
* `ingress_ambassador_version` (default: `*`): SemVer rule for versions allowed for
|
|
installation/updates.
|
|
* `ingress_ambassador_secure_port` (default: 443): HTTPS port to listen at.
|
|
* `ingress_ambassador_insecure_port` (default: 80): HTTP port to listen at.
|
|
|
|
### Ambassador Operator
|
|
|
|
This Ambassador addon deploys the Ambassador Operator, which in turn will install
|
|
the [Ambassador API Gateway](https://github.com/datawire/ambassador) in
|
|
a Kubernetes cluster.
|
|
|
|
The Ambassador Operator is a Kubernetes Operator that controls Ambassador's complete lifecycle
|
|
in your cluster, automating many of the repeatable tasks you would otherwise have to perform
|
|
yourself. Once installed, the Operator will complete installations and seamlessly upgrade to new
|
|
versions of Ambassador as they become available.
|
|
|
|
## Usage
|
|
|
|
The following example creates simple http-echo services and an `Ingress` object
|
|
to route to these services.
|
|
|
|
Note well that the [Ambassador API Gateway](https://github.com/datawire/ambassador) will automatically load balance `Ingress` resources
|
|
that include the annotation `kubernetes.io/ingress.class=ambassador`. All the other
|
|
resources will be just ignored.
|
|
|
|
```yaml
|
|
kind: Pod
|
|
apiVersion: v1
|
|
metadata:
|
|
name: foo-app
|
|
labels:
|
|
app: foo
|
|
spec:
|
|
containers:
|
|
- name: foo-app
|
|
image: hashicorp/http-echo
|
|
args:
|
|
- "-text=foo"
|
|
---
|
|
kind: Service
|
|
apiVersion: v1
|
|
metadata:
|
|
name: foo-service
|
|
spec:
|
|
selector:
|
|
app: foo
|
|
ports:
|
|
# Default port used by the image
|
|
- port: 5678
|
|
---
|
|
apiVersion: extensions/v1beta1
|
|
kind: Ingress
|
|
metadata:
|
|
name: example-ingress
|
|
annotations:
|
|
kubernetes.io/ingress.class: ambassador
|
|
spec:
|
|
rules:
|
|
- http:
|
|
paths:
|
|
- path: /foo
|
|
backend:
|
|
serviceName: foo-service
|
|
servicePort: 5678
|
|
```
|
|
|
|
Now you can test that the ingress is working with curl:
|
|
|
|
```console
|
|
$ export AMB_IP=$(kubectl get service ambassador -n ambassador -o 'go-template={{range .status.loadBalancer.ingress}}{{print .ip "\n"}}{{end}}')
|
|
$ curl $AMB_IP/foo
|
|
foo
|
|
```
|