From ea3f5c60799947c300153d1cfb06b991ae288bc7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mathias=20=C3=85hsberg?= <mathias.ahsberg@gmail.com>
Date: Thu, 17 Oct 2024 12:27:17 +0200
Subject: [PATCH] Helm chart: add `extraInitContainers` value (#9773)

---
 helm/nessie/README.md                 | 1 +
 helm/nessie/ci/inmemory-values.yaml   | 6 ++++++
 helm/nessie/templates/deployment.yaml | 4 ++++
 helm/nessie/values.yaml               | 7 +++++++
 4 files changed, 18 insertions(+)

diff --git a/helm/nessie/README.md b/helm/nessie/README.md
index f0fa0367c21..dd5a50b31aa 100644
--- a/helm/nessie/README.md
+++ b/helm/nessie/README.md
@@ -240,6 +240,7 @@ ct install --charts ./helm/nessie --namespace nessie-ns --debug
 | dynamodb.secret.awsSecretAccessKey | string | `"aws_secret_access_key"` | The secret key storing the AWS secret access key. |
 | dynamodb.secret.name | string | `"awscreds"` | The secret name to pull AWS credentials from. Optional; if not present, the default AWS credentials provider chain is used. |
 | extraEnv | list | `[]` | Advanced configuration via Environment Variables. Extra environment variables to add to the Nessie server container. You can pass here any valid EnvVar object: https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.27/#envvar-v1-core This can be useful to get configuration values from Kubernetes secrets or config maps. |
+| extraInitContainers | list | `[]` | Add additional init containers to the nessie pod(s) See https://kubernetes.io/docs/concepts/workloads/pods/init-containers/. |
 | extraServices | list | `[]` | Additional service definitions. All service definitions always select all Nessie pods. Use this if you need to expose specific ports with different configurations. |
 | extraVolumeMounts | list | `[]` | Extra volume mounts to add to the nessie container. See https://kubernetes.io/docs/concepts/storage/volumes/. |
 | extraVolumes | list | `[]` | Extra volumes to add to the nessie pod. See https://kubernetes.io/docs/concepts/storage/volumes/. |
diff --git a/helm/nessie/ci/inmemory-values.yaml b/helm/nessie/ci/inmemory-values.yaml
index 8c77c518045..cfe2497fdf2 100644
--- a/helm/nessie/ci/inmemory-values.yaml
+++ b/helm/nessie/ci/inmemory-values.yaml
@@ -140,3 +140,9 @@ readinessProbe:
   periodSeconds: 5
   successThreshold: 1
   failureThreshold: 3
+
+extraInitContainers:
+  - name: hello-world
+    image: bash
+    imagePullPolicy: Always
+    command: ['sh', '-c', 'echo "hello world"']
diff --git a/helm/nessie/templates/deployment.yaml b/helm/nessie/templates/deployment.yaml
index 53947e42ff1..5b253290e3e 100644
--- a/helm/nessie/templates/deployment.yaml
+++ b/helm/nessie/templates/deployment.yaml
@@ -53,6 +53,10 @@ spec:
       serviceAccountName: {{ include "nessie.serviceAccountName" . }}
       securityContext:
         {{- tpl (toYaml .Values.podSecurityContext) . | nindent 8 }}
+      {{- if .Values.extraInitContainers }}
+      initContainers:
+        {{- tpl (toYaml .Values.extraInitContainers) . | nindent 8 }}
+      {{- end }}
       containers:
         - name: {{ .Chart.Name }}
           securityContext:
diff --git a/helm/nessie/values.yaml b/helm/nessie/values.yaml
index c1dcedffb74..d3f426ad1b5 100644
--- a/helm/nessie/values.yaml
+++ b/helm/nessie/values.yaml
@@ -933,3 +933,10 @@ extraVolumes: []
 extraVolumeMounts: []
     # - name: extra-volume
     #   mountPath: /usr/share/extra-volume
+
+# -- Add additional init containers to the nessie pod(s) See https://kubernetes.io/docs/concepts/workloads/pods/init-containers/.
+extraInitContainers: []
+    # - name: your-image-name
+    #   image: your-image
+    #   imagePullPolicy: Always
+    #   command: ['sh', '-c', 'echo "hello world"']