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Document Istio requirements

This commit is contained in:
stefanprodan 2019-02-02 12:16:16 +02:00
parent 7c166e2b40
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29
docs/gitbook/install/flagger-install-on-kubernetes.md
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@ -4,22 +4,22 @@ This guide walks you through setting up Flagger on a Kubernetes cluster.
### Prerequisites
Flagger requires a Kubernetes cluster v1.11 or newer with the
MutatingAdmissionWebhook and ValidatingAdmissionWebhook admission controllers enabled.
Flagger requires a Kubernetes cluster **v1.11** or newer with the following admission controllers enabled:
Flagger depends on Istio v1.0.3 or newer configured with the following components:
* MutatingAdmissionWebhook
* ValidatingAdmissionWebhook
Flagger depends on [Istio](https://istio.io/docs/setup/kubernetes/quick-start/) **v1.0.3** or newer
with traffic management, telemetry and Prometheus enabled.
A minimal Istio installation should contain the following services:
* istio-citadel
* istio-ingressgateway
* istio-pilot
* istio-policy
* istio-ingressgateway
* istio-sidecar-injector
* istio-telemetry
* prometheus
To install and configure Istio you can follow the instructions on
[istio.io](https://istio.io/docs/setup/kubernetes/quick-start/).
### Install Flagger
Add Flagger Helm repository:
@ -36,6 +36,8 @@ helm upgrade -i flagger flagger/flagger \
--set metricsServer=http://prometheus.istio-system:9090
```
You can install Flagger in any namespace as long as it can talk to the Istio Prometheus service on port 9090.
Enable **Slack** notifications:
```bash
@ -69,9 +71,9 @@ Deploy Grafana in the _**istio-system**_ namespace:
```bash
helm upgrade -i flagger-grafana flagger/grafana \
--namespace=istio-system \
--set url=http://prometheus:9090 \
--set url=http://prometheus.istio-system:9090 \
--set user=admin \
--set password=admin
--set password=change-me
```
Or use helm template command and apply the generated yaml with kubectl:
@ -81,15 +83,16 @@ Or use helm template command and apply the generated yaml with kubectl:
helm template flagger/grafana \
--name flagger-grafana \
--namespace=istio-system \
--set url=http://prometheus.istio-system:9090 \
--set user=admin \
--set password=admin \
--set password=change-me \
> $HOME/flagger-grafana.yaml
# apply
kubectl apply -f $HOME/flagger-grafana.yaml
```
You access Grafana using port forwarding:
You can access Grafana using port forwarding:
```bash
kubectl -n istio-system port-forward svc/flagger-grafana 3000:3000