How to configure custom themes for keyCloak on kubernetes

The approach that I have used on the past was to first create a .tar file (e.g., custom_theme.tar) with the custom themes to be used in Keycloak. Then mount volume to the folder where the Keycloak themes are stored (i.e., /opt/jboss/keycloak/themes/my_custom_theme), and copy the .tar file with the custom themes from a local folder into the Keycloak container.

The helm char folder structure:

Chart.yaml      custom_theme.tar    templates       values.yaml

the content of :

values.yaml:

password: adminpassword

The template folder structure:

customThemes-configmap.yaml ingress.yaml            service.yamldeployment.yaml         secret.yaml

the content of :

customThemes-configmap.yaml

apiVersion: v1kind: ConfigMapmetadata:  name: customthemes-configmapbinaryData:  custom_theme.tar: |-    {{ .Files.Get "custom_theme.tar" | b64enc}}

ingress.yaml

apiVersion: extensions/v1beta1kind: Ingressmetadata:  name: keycloakspec:  tls:    - hosts:      - keycloak-sprint01.demo  rules:  - host: keycloak-sprint01.demo    http:      paths:      - backend:          serviceName: keycloak          servicePort: 8080

service.yaml

apiVersion: v1kind: Servicemetadata:  name: keycloak  labels:    app: keycloakspec:  ports:  - name: http    port: 8080    targetPort: 8080  selector:    app: keycloak  type: LoadBalancer

secret.yaml

apiVersion: v1kind: Secretmetadata:  name: keycloak-passwordtype: OpaquestringData:  password: {{.Values.password}}

deployment.yaml

apiVersion: apps/v1kind: Deploymentmetadata:  name: keycloak  namespace: default  labels:    app: keycloakspec:  replicas: 1  selector:    matchLabels:      app: keycloak  template:    metadata:      labels:        app: keycloak    spec:      containers:      - name: keycloak        image: quay.io/keycloak/keycloak:10.0.1        env:        - name: KEYCLOAK_USER          value: "admin"        - name: KEYCLOAK_PASSWORD          valueFrom:            secretKeyRef:              name: keycloak-password              key: password        - name: PROXY_ADDRESS_FORWARDING          value: "true"        - name: DB_VENDOR          value: "h2"        - name: JAVA_TOOL_OPTIONS          value: -Dkeycloak.profile.feature.scripts=enabled        ports:        - name: http          containerPort: 8080        - name: https          containerPort: 8443        readinessProbe:          httpGet:            path: /auth/realms/master            port: 8080        volumeMounts:        - mountPath: /opt/jboss/keycloak/themes/my_custom_theme          name: shared-volume                            initContainers:        - name: init-customtheme          image: busybox:1.28          command: ['sh', '-c', 'cp -rL /CustomTheme/custom_theme.tar /shared && cd /shared/ && tar -xvf custom_theme.tar && rm -rf custom_theme.tar']          volumeMounts:          - mountPath: /shared            name: shared-volume                    - mountPath: /CustomTheme            name: theme-volume                         volumes:      - name: shared-volume        emptyDir: {}      - name: theme-volume        configMap:          name: customthemes-configmap 

I am not claiming that this is the best way to do it, I am not an expert in Kubernetes or helm. A Git repo containing the aforementioned files can be found here.