visualize-fluxcd-with-weave-dashboard

In a previous article, I introduced FluxCD to bring GitOps approach to a project. This is quite interesting but mostly based on command-line interaction which can be painful for some users. Fortunately, weave company releases an open-source tool to easily plug a user-friendly UI to display your Flux information. This article will explain how to set it up and use it.

Install CLI

The official documentation is quite clear, but here are the main steps.

First, we need to install gitops locally, here I'm using MacOS so I'm using homebrew

$ brew tap weaveworks/tap
$ brew install weaveworks/tap/gitops
# Check everything is fine
$ gitops version
/ Update

For a more generic way to install the CLI, you can use curl

$ curl --silent --location "https://github.com/weaveworks/weave-gitops/releases/download/v0.30.0/gitops-$(uname)-$(uname -m).tar.gz" | tar xz -C /tmp
$ sudo mv /tmp/gitops /usr/local/bin

Generate weave-gitops configuration

Now, we need to get the configuration for the dashboard to be installed.

$ PASSWORD="averyverystrongpassword"
$ gitops create dashboard ww-gitops \
  --password=$PASSWORD \
  --export > ./clusters/ovh-fluxcd/weave/weave-gitops-dashboard.yaml

⚠️ PASSWORD is a demo one here. You can set up another one or better use an external secret manager

Here, I'm using the same repository as for my previous article: https://gitlab.com/fun_with/fun-with-k8s/fun-with-fluxcd

This command generates 2 components for Flux:

HelmRepository describing where the helm chart is hosted
HelmRelease describes how to deploy the chart into the cluster

---
apiVersion: source.toolkit.fluxcd.io/v1beta2
kind: HelmRepository
metadata:
  annotations:
    metadata.weave.works/description: This is the source location for the Weave GitOps
      Dashboard's helm chart.
  labels:
    app.kubernetes.io/component: ui
    app.kubernetes.io/created-by: weave-gitops-cli
    app.kubernetes.io/name: weave-gitops-dashboard
    app.kubernetes.io/part-of: weave-gitops
  name: ww-gitops
  namespace: flux-system
spec:
  interval: 1h0m0s
  type: oci
  url: oci://ghcr.io/weaveworks/charts
---
apiVersion: helm.toolkit.fluxcd.io/v2beta1
kind: HelmRelease
metadata:
  annotations:
    metadata.weave.works/description: This is the Weave GitOps Dashboard.  It provides
      a simple way to get insights into your GitOps workloads.
  name: ww-gitops
  namespace: flux-system
spec:
  chart:
    spec:
      chart: weave-gitops
      sourceRef:
        kind: HelmRepository
        name: ww-gitops
  interval: 1h0m0s
  values:
    WEAVE_GITOPS_FEATURE_TELEMETRY: "true"
    adminUser:
      create: true
      passwordHash: $2a$10$t/wk8MIWCYp.HBRE68T8FO5UVxTqtZM55BD4XfntO74WuMQAiqJYm
      username: admin

⚠️ Beware, in 0.30.0 of weave-gitops, the generated file is failing with Flux v2 because the apiversion of the HelmRepository is in v1 and should be in v1beta2 as in the example above. This bug will be fixed in 0.31.0

Now, we commit the file to our repository. A few times after, we can see in the helm-controller component logs that it has been detected and that weave-gitops is installed

$ kubectl logs -f helm-controller-7f8449fd58-bzsnl -n flux-system
[...]
{"level":"info","ts":"2023-08-21T17:01:09.861Z","msg":"HelmChart 'flux-system/flux-system-ww-gitops' is not ready","controller":"helmrelease","controllerGroup":"helm.toolkit.fluxcd.io","controllerKind":"HelmRelease","HelmRelease":{"name":"ww-gitops","namespace":"flux-system"},"namespace":"flux-system","name":"ww-gitops","reconcileID":"e812c347-8d36-4822-b16a-6770661ee06e"}
{"level":"info","ts":"2023-08-21T17:01:09.897Z","msg":"reconcilation finished in 129.917342ms, next run in 1h0m0s","controller":"helmrelease","controllerGroup":"helm.toolkit.fluxcd.io","controllerKind":"HelmRelease","HelmRelease":{"name":"ww-gitops","namespace":"flux-system"},"namespace":"flux-system","name":"ww-gitops","reconcileID":"e812c347-8d36-4822-b16a-6770661ee06e"}
[...]

$ kubectl get po -n fluw-system
NAME                                       READY   STATUS    RESTARTS   AGE
helm-controller-7f8449fd58-bzsnl           1/1     Running   0          4d22h
kustomize-controller-6f666f899b-wrshg      1/1     Running   0          4d22h
notification-controller-55bcdc9fcf-8ffkh   1/1     Running   0          4d22h
source-controller-b5f58d88d-4hzz7          1/1     Running   0          4d22h
ww-gitops-weave-gitops-7cf4bb77f7-7xhlx    1/1     Running   0          18h

Access the dashboard

If we have a look at the components deployed by weave-gitops, we can see that there's a service exposing a port to access the dashboard. We can use port-forward command to make it accessible locally

$ kubectl get svc -n flux-system
NAME                      TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)    AGE
notification-controller   ClusterIP   10.3.112.238   <none>        80/TCP     4d22h
source-controller         ClusterIP   10.3.74.168    <none>        80/TCP     4d22h
webhook-receiver          ClusterIP   10.3.168.89    <none>        80/TCP     4d22h
ww-gitops-weave-gitops    ClusterIP   10.3.133.2     <none>        9001/TCP   18h

$ kubectl port-forward svc/ww-gitops-weave-gitops -n flux-system 9001:9001
Forwarding from 127.0.0.1:9001 -> 9001
Forwarding from [::1]:9001 -> 9001

We can now access the dashboard in a browser and use admin and our super password to log in

Discovering the dashboard

Let's have a look at the information available on the dashboard

Applications listing all components managed with Flux
- For each application, we have access to
  - Details of all components included in the application
  - Events that happened on the application
  - Graph showing component links
  - Dependencies with other applications
  - A yaml description of the application that can be exported
  - Potential violations (not yet tried on my side)
Sources displaying all different kinds of sources synchronized with Flux
- For each source, we have access to
  - Details regarding the configuration
  - Events that occurred on it
  - A yaml definition of it that can be exported

Flux Runtime summarizes the current version of different components of Flux
Notifications & Image automation (but haven't tried it yet)

Conclusion

weave-gitops is a very convenient way to display easily information regarding Flux usage in a cluster. We can easily retrieve information, start and stop synchronization of applications.

To go further, it could be nice to also declare new applications, sources, ... directly within the UI but it could be in a future release as the support team is quite reactive. For instance, I discovered a bug with Flux v2 version. I posted an issue on GitHub repository and it was fixed by the next day 👍

🙏 As usual thanks to OVHcloud to support me for this article by providing me with environments on their platform to test and illustrate.

At the time of this article, weave-gitops was in version 0.31.0

Visualize FluxCD with weave-gitops dashboard

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