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Version: 3.8.0

ChaosCenter namespace scope installation

Prerequisites​

Before deploying LitmusChaos, make sure the following items are there

  • Kubernetes 1.17 or later

  • A Persistent volume of 20GB

    note

    Although it is recommended to have a Persistent Volume(PV) of 20GB, you can start with 1GB for test purposes as well. This PV is used as persistent storage to store the chaos config and chaos-metrics in ChaosCenter. By default, Litmus would use the default storage class to allocate the PV.

  • Helm3 or kubectl

Installation​

Installation of Litmus can be done using either of the below methods

Helm installation​

The Helm chart will install all the required service account configuration and ChaosCenter.

The following steps will help you install Litmus ChaosCenter via Helm.

Step-1: Add Helm repository​

helm repo add litmuschaos https://litmuschaos.github.io/litmus-helm/
helm repo list

Step-2: Create deployment namespace​

note

Skip to the next step if the namespace already exists.

The ChaosCenter components can be deployed in any namespace, though by default it is deployed to the litmus namespace.

kubectl create ns litmus

Step-3: Install CRDs​

The cluster-admin or an equivalent user with the right permissions are required to install the CRDs upfront.

kubectl apply -f https://raw.githubusercontent.com/litmuschaos/litmus/master/chaoscenter/manifests/litmus-portal-crds.yml
Expected Output
customresourcedefinition.apiextensions.k8s.io/clusterworkflowtemplates.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/cronworkflows.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/workflows.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/workflowtemplates.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/chaosengines.litmuschaos.io created
customresourcedefinition.apiextensions.k8s.io/chaosexperiments.litmuschaos.io created
customresourcedefinition.apiextensions.k8s.io/chaosresults.litmuschaos.io created
customresourcedefinition.apiextensions.k8s.io/eventtrackerpolicies.eventtracker.litmuschaos.io created

Step-4: Install ChaosCenter​

helm install chaos litmuschaos/litmus --namespace=litmus --set portalScope=namespace
Expected Output
NAME: chaos
LAST DEPLOYED: Tue Jun 15 19:20:09 2021
NAMESPACE: litmus
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Thank you for installing litmus 😀

Your release is named chaos and its installed to namespace: litmus.

Visit https://docs.litmuschaos.io/ to find more info.

info

Litmus uses Kubernetes CRDs to define chaos intent. Helm3 handles CRDs better than Helm2. Before you start running a chaos experiment, verify if Litmus is installed correctly.

Kubectl installation​

Create deployment namespace​

  1. Create a namespace, say litmus:
kubectl create ns litmus
  1. To verify if the namespace is created, run the following command:
kubectl get ns
Expected Output
NAME                        STATUS   AGE
litmus                      Active   2s

Install CRDs​

The cluster-admin or an equivalent user with the right permissions are required to install the CRDs upfront.

kubectl apply -f https://raw.githubusercontent.com/litmuschaos/litmus/master/chaoscenter/manifests/litmus-portal-crds.yml
Expected Output
customresourcedefinition.apiextensions.k8s.io/clusterworkflowtemplates.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/cronworkflows.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/workflows.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/workflowtasksets.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/workflowtemplates.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/chaosengines.litmuschaos.io created
customresourcedefinition.apiextensions.k8s.io/chaosexperiments.litmuschaos.io created
customresourcedefinition.apiextensions.k8s.io/chaosresults.litmuschaos.io created
customresourcedefinition.apiextensions.k8s.io/eventtrackerpolicies.eventtracker.litmuschaos.io created

Install Litmus from ChaosCenter​

Applying the manifest file will install all the required service account configuration and ChaosCenter.

kubectl apply -f https://raw.githubusercontent.com/litmuschaos/litmus/master/mkdocs/docs/3.8.0/litmus-namespaced-3.8.0.yaml -n <Your Namespace>
note

You need to provide the Namespace in place of <Your Namespace>, that you have created earlier for the LitmusChaos installation.

Expected Output
role.rbac.authorization.k8s.io/argo-role-for-litmusportal-server created
rolebinding.rbac.authorization.k8s.io/argo-rb-for-litmusportal-server created
role.rbac.authorization.k8s.io/litmus-namespace-scope-for-litmusportal-server created
rolebinding.rbac.authorization.k8s.io/litmus-namespace-scope-rb-for-litmusportal-server created
role.rbac.authorization.k8s.io/subscriber-role-for-litmusportal-server created
rolebinding.rbac.authorization.k8s.io/subscriber-rb-for-litmusportal-server created
role.rbac.authorization.k8s.io/litmus-admin-role-for-litmusportal-server created
rolebinding.rbac.authorization.k8s.io/litmus-admin-rb-for-litmusportal-server created
role.rbac.authorization.k8s.io/chaos-role-for-litmusportal-server created
rolebinding.rbac.authorization.k8s.io/chaos-rb-for-litmusportal-server created
role.rbac.authorization.k8s.io/event-tracker-role-for-litmusportal-server created
rolebinding.rbac.authorization.k8s.io/event-tracker-rb-for-litmusportal-server created
role.rbac.authorization.k8s.io/litmus-server-role created
rolebinding.rbac.authorization.k8s.io/litmus-server-rb created
serviceaccount/litmus-server-account created
secret/litmus-portal-admin-secret created
configmap/litmus-portal-admin-config created
configmap/litmusportal-frontend-nginx-configuration created
deployment.apps/litmusportal-frontend created
service/litmusportal-frontend-service created
deployment.apps/litmusportal-server created
service/litmusportal-server-service created
deployment.apps/litmusportal-auth-server created
service/litmusportal-auth-server-service created
statefulset.apps/mongo created
service/mongo-service created
service/mongo-headless-service created

Verify installation​

Verify frontend, auth server, backend server, and database pods​

  • Check the pods in the namespace where you installed Litmus:

    kubectl get pods -n litmus
    Expected Output
    NAME                                    READY   STATUS  RESTARTS  AGE
    litmusportal-server-6fd57cc89-6w5pn        1/1     Running              0          57s
    litmusportal-auth-server-7b596fff9-5s6g5   1/1     Running              0          57s
    mongo-0                                    1/1     Running              0          57s
    litmusportal-frontend-55974fcf59-cxxrf     1/1     Running              0          58s

  • Check the services running in the namespace where you installed Litmus:

    kubectl get svc -n litmus
    Expected Output
    NAME                            TYPE        CLUSTER-IP      EXTERNAL-IP PORT(S)                       AGE
    litmusportal-frontend-service      NodePort    10.43.79.17    <none>        9091:31846/TCP                  102s
    litmusportal-server-service        NodePort    10.43.30.54    <none>        9002:31245/TCP,8000:32714/TCP   101s
    litmusportal-auth-server-service   NodePort    10.43.81.108   <none>        9003:32618/TCP,3030:31899/TCP   101s
    mongo-service                      ClusterIP   10.43.227.10   <none>        27017/TCP                       101s
    mongo-headless-service             ClusterIP   None           <none>        27017/TCP                       101s
info

With the namespace mode of the control panel, we need to set the endpoint of the chaos center ui according to the use case for external Chaos Delegates. By default, it is http://litmusportal-frontend-service:9091

To alter, Apply:

kubectl set env deployment/litmusportal-server -n litmus --containers="graphql-server" CHAOS_CENTER_UI_ENDPOINT="http://172.132.44.44:3231"

Resources​

Learn more​