Add helm chart to rotate registry creds

src/kubernetes/jit_ecr/Chart.yaml

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+apiVersion: v2
+name: jit_ecr
+version: 0.1.0
+description: Helm chart to manage registry credentials for JIT using authentication APIs

src/kubernetes/jit_ecr/README.md

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+# JIT Container Registry Credentials Manager
+
+## Overview
+
+This Helm chart deploys a system to manage and rotate Jit container registry secrets automatically. It ensures that containers (which are controls) can be pulled from the Jit Container Registry by maintaining up-to-date credentials.
+
+## Purpose
+
+The main purpose of this chart is to:
+
+1. Authenticate with the Jit API to obtain container registry credentials.
+2. Create and update a Kubernetes secret containing these credentials.
+3. Periodically refresh the credentials to ensure continued access to the Jit Container Registry.
+
+## Components
+
+The chart consists of the following main components:
+
+1. **Initial Login Job**: A one-time job that runs immediately after chart installation to set up the initial container registry credentials.
+2. **Refresh CronJob**: A periodically running job that refreshes the container registry credentials to ensure they remain valid.
+3. **ConfigMap**: Contains the script used by both the initial job and the CronJob to fetch and update the credentials.
+4. **ServiceAccount and RBAC**: Provides necessary permissions for the jobs to create and update secrets in the specified namespace.
+
+## Prerequisites
+
+- Kubernetes 1.16+
+- Helm 3.0+
+- A valid Jit account with API credentials (Client ID and Secret)
+  - These can be obtained from https://docs.jit.io/docs/managing-users#generating-api-tokens
+  - The API credentials should be created with the Member role
+  - The secret should be kept securely and not shared or exposed publicly
+
+## Installation
+
+To install the chart with the release name `jit-registry`:
+
+```bash
+helm install jit-registry . \
+  --set client_id=your-client-id \
+  --set secret=your-secret \
+  --set namespace=your-namespace
+```
+
+## Configuration
+
+The following table lists the configurable parameters of the JIT Container Registry Credentials Manager chart and their default values.
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `client_id` | Jit API Client ID (Member role) | `"<JIT_API_CLIENT_ID>"` |
+| `secret` | Jit API Secret | `"<JIT_API_SECRET>"` |
+| `jit_base_url` | Jit API Base URL | `"https://api.jit.io"` |
+| `registry_name` | Jit Container Registry Name | `"registry.jit.io"` |
+| `keep_job_history_seconds` | Time (in seconds) to keep job history | `86400` |
+| `namespace` | Kubernetes namespace to deploy to | `"default"` |
+| `jit_ecr_secret_name` | Name of the Kubernetes secret for container registry credentials | `"jit-registry-creds"` |
+
+To modify any of these parameters, you can use the `--set key=value[,key=value]` argument to `helm install` or `helm upgrade`, or modify the `values.yaml` file directly.
+
+Note: The `client_id` and `secret` should be obtained from https://docs.jit.io/docs/managing-users#generating-api-tokens. Make sure to use the "Member" role when generating these credentials. Please store these values in a secure place and never expose them publicly.
+
+The `jit_ecr_secret_name` should match the Kubernetes runner configuration. For example, in GitLab:
+
+```yaml
+[runners.kubernetes]
+   poll_timeout = 2000
+   node_selector_overwrite_allowed = ".*"
+   image_pull_secrets=["jit-registry-creds"]
+```
+
+## Usage
+
+After installation, the chart will:
+
+1. Create an initial Kubernetes secret with container registry credentials.
+2. Set up a CronJob to refresh these credentials periodically.
+
+You can use the created secret (`jit-registry-creds` by default) in your pod specifications to pull images from the Jit Container Registry:
+
+```yaml
+spec:
+  imagePullSecrets:
+    - name: jit-registry-creds
+  containers:
+    - name: your-container
+      image: registry.jit.io/your-image:tag
+```
+
+## Monitoring and Troubleshooting
+
+To check the status of the initial login job:
+
+```bash
+kubectl get jobs -n your-namespace jit-registry-initial-login
+```
+
+To check the status of the refresh CronJob:
+
+```bash
+kubectl get cronjobs -n your-namespace jit-registry-refresh
+```
+
+To view logs of the most recent job execution:
+
+```bash
+kubectl logs -n your-namespace job/jit-registry-refresh-<job-id>
+```
+
+For more detailed instructions, please refer to the NOTES.txt file that is displayed after chart installation.
+
+## Uninstalling the Chart
+
+To uninstall/delete the `jit-registry` deployment:
+
+```bash
+helm delete jit-registry
+```
+
+This command removes all the Kubernetes components associated with the chart and deletes the release.
+
+## Security Considerations
+
+- The Jit API Secret is sensitive information. Always handle it securely and avoid exposing it in logs, command-line arguments, or version control systems.
+- Use Kubernetes Secrets or a secure secrets management system to store the `client_id` and `secret`.
+- Regularly rotate your Jit API credentials as per your organization's security policies.
+
+## Support
+
+For any issues or questions, please contact Jit support or open an issue in the chart's repository.

src/kubernetes/jit_ecr/templates/NOTES.txt

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+{{- if .Values.client_id }}
+{{- if .Values.secret }}
+Congratulations! You've installed the JIT registry credentials manager.
+
+To verify that the initial login was successful, run the following command:
+
+kubectl logs -n {{ .Values.namespace }} $(kubectl get pods -n {{ .Values.namespace }} -l job-name=jit-ecr-initial-login --sort-by=.metadata.creationTimestamp --output=jsonpath='{.items[-1:].metadata.name}')
+
+This command will display the logs of the most recently created pod for the initial login job. Look for the message "registry credentials updated successfully on <date>" at the end of the logs.
+
+If you don't see the success message or encounter any errors, you can describe the job for more information:
+kubectl describe job jit-ecr-initial-login -n {{ .Values.namespace }}
+
+The registry credentials secret has been created as {{ .Values.jit_ecr_secret_name }} in the {{ .Values.namespace }} namespace.
+
+To verify the created secret, run:
+kubectl get secret {{ .Values.jit_ecr_secret_name }} --namespace {{ .Values.namespace }}
+
+A CronJob has also been set up to refresh these credentials periodically. You can check its status and logs with:
+kubectl get cronjob -n {{ .Values.namespace }} jit-ecr-refresh
+kubectl logs -n {{ .Values.namespace }} $(kubectl get pods -n {{ .Values.namespace }} -l cronjob-name=jit-ecr-refresh --sort-by=.metadata.creationTimestamp --output=jsonpath='{.items[-1:].metadata.name}')
+
+{{- else }}
+Error: "secret" value is mandatory.
+{{- end }}
+{{- else }}
+Error: "client_id" value is mandatory.
+{{- end }}

src/kubernetes/jit_ecr/templates/cronjob.yaml

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+{{- if .Values.client_id }}
+{{- if .Values.secret }}
+---
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: jit-ecr-refresh
+  namespace: {{ .Values.namespace }}
+spec:
+  schedule: "0 */10 * * *"
+  successfulJobsHistoryLimit: 1
+  failedJobsHistoryLimit: 1
+  jobTemplate:
+    spec:
+      ttlSecondsAfterFinished: {{ .Values.keep_job_history_seconds }}
+      template:
+        spec:
+          serviceAccountName: sa-jit-ecr
+          containers:
+            - name: jit-ecr-refresh
+              image: alpine/k8s:1.26.8
+              command: ["/bin/sh", "/scripts/jit-ecr-script.sh"]
+              volumeMounts:
+                - name: secrets
+                  mountPath: /secrets
+                  readOnly: true
+                - name: script-volume
+                  mountPath: /scripts
+                  readOnly: true
+              resources:
+                limits:
+                  cpu: 100m
+                  memory: 128Mi
+          volumes:
+            - name: secrets
+              secret:
+                secretName: ecr-registry-helper-secrets
+            - name: script-volume
+              configMap:
+                name: jit-ecr-script
+          restartPolicy: OnFailure
+{{- end }}
+{{- end }}

src/kubernetes/jit_ecr/templates/jit_creds_secret.yaml

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+{{- if .Values.client_id }}
+{{- if .Values.secret }}
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: ecr-registry-helper-secrets
+  namespace: {{ .Values.namespace }}
+stringData:
+  client_id: "{{ .Values.client_id }}"
+  secret: "{{ .Values.secret }}"
+{{- end }}
+{{- end }}

src/kubernetes/jit_ecr/templates/job.yaml

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+{{- if .Values.client_id }}
+{{- if .Values.secret }}
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: jit-ecr-initial-login
+  namespace: {{ .Values.namespace }}
+spec:
+  ttlSecondsAfterFinished: {{ .Values.keep_job_history_seconds }}
+  template:
+    spec:
+      serviceAccountName: sa-jit-ecr
+      containers:
+        - name: jit-ecr-initial-login
+          image: alpine/k8s:1.26.8
+          command: ["/bin/sh", "/scripts/jit-ecr-script.sh"]
+          volumeMounts:
+            - name: secrets
+              mountPath: /secrets
+              readOnly: true
+            - name: script-volume
+              mountPath: /scripts
+              readOnly: true
+          resources:
+            limits:
+              cpu: 100m
+              memory: 128Mi
+      volumes:
+        - name: secrets
+          secret:
+            secretName: ecr-registry-helper-secrets
+        - name: script-volume
+          configMap:
+            name: jit-ecr-script
+      restartPolicy: OnFailure
+{{- end }}
+{{- end }}

src/kubernetes/jit_ecr/templates/role.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  namespace: {{ .Values.namespace }}
+  name: role-access-to-jit-ecr-secret
+rules:
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["delete"]
+  resourceNames: ["{{ .Values.jit_ecr_secret_name }}"]
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["create"]
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["get"]
+  resourceNames: ["ecr-registry-helper-secrets"]

src/kubernetes/jit_ecr/templates/rolebinding.yaml

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+kind: RoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: jit-ecr-role-binding
+  namespace: {{ .Values.namespace }}
+subjects:
+- kind: ServiceAccount
+  name: sa-jit-ecr
+  namespace: {{ .Values.namespace }}
+  apiGroup: ""
+roleRef:
+  kind: Role
+  name: role-access-to-jit-ecr-secret
+  apiGroup: ""

src/kubernetes/jit_ecr/templates/script-configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: jit-ecr-script
+  namespace: {{ .Values.namespace }}
+data:
+  jit-ecr-script.sh: |
+    #!/bin/sh
+    set -e
+
+    # Install jq
+    apk add --no-cache jq
+
+    # Wait for the secret to be available
+    until kubectl get secret ecr-registry-helper-secrets -n {{ .Values.namespace }}; do
+      echo "Waiting for secret ecr-registry-helper-secrets to be created..."
+      sleep 5
+    done
+
+    # Read credentials from the secret
+    CLIENT_ID=$(kubectl get secret ecr-registry-helper-secrets -n {{ .Values.namespace }} -o jsonpath='{.data.client_id}' | base64 -d)
+    SECRET=$(kubectl get secret ecr-registry-helper-secrets -n {{ .Values.namespace }} -o jsonpath='{.data.secret}' | base64 -d)
+
+    # Perform login to get access token
+    echo "Requesting access token..."
+    AUTH_RESPONSE=$(curl -s -w "\n%{http_code}" -X POST {{ .Values.jit_base_url }}/authentication/login \
+      -H "Content-Type: application/json" \
+      -d "{\"clientId\": \"$CLIENT_ID\", \"secret\": \"$SECRET\"}")
+    AUTH_STATUS=$(echo "$AUTH_RESPONSE" | tail -n1)
+    AUTH_BODY=$(echo "$AUTH_RESPONSE" | sed '$d')
+
+    if [ "$AUTH_STATUS" -ne 200 ]; then
+      echo "Failed to obtain access token. HTTP Status: $AUTH_STATUS"
+      echo "Response body: $AUTH_BODY"
+      exit 1
+    fi
+
+    ACCESS_TOKEN=$(echo "$AUTH_BODY" | jq -r '.accessToken')
+
+    if [ -z "$ACCESS_TOKEN" ] || [ "$ACCESS_TOKEN" = "null" ]; then
+      echo "Failed to extract access token from response"
+      echo "Response body: $AUTH_BODY"
+      exit 1
+    fi
+
+    echo "Access token obtained successfully"
+
+    # Use access token to get registry credentials
+    echo "Requesting registry token..."
+    REGISTRY_RESPONSE=$(curl -s -w "\n%{http_code}" -X POST {{ .Values.jit_base_url }}/authentication/registry/login \
+      -H "Authorization: Bearer $ACCESS_TOKEN")
+    REGISTRY_STATUS=$(echo "$REGISTRY_RESPONSE" | tail -n1)
+    REGISTRY_BODY=$(echo "$REGISTRY_RESPONSE" | sed '$d')
+
+    if [ "$REGISTRY_STATUS" -ne 200 ]; then
+      echo "Failed to obtain registry token. HTTP Status: $REGISTRY_STATUS"
+      echo "Response body: $REGISTRY_BODY"
+      exit 1
+    fi
+
+    REGISTRY_TOKEN="$REGISTRY_BODY"
+
+    if [ -z "$REGISTRY_TOKEN" ]; then
+      echo "Failed to obtain registry token"
+      echo "Response body: $REGISTRY_BODY"
+      exit 1
+    fi
+
+    echo "registry token obtained successfully"
+
+    # Delete existing Kubernetes Docker registry secret (ignore if not found)
+    echo "Deleting existing Kubernetes secret (if any)..."
+    kubectl delete secret {{ .Values.jit_ecr_secret_name }} -n {{ .Values.namespace }} 2>/dev/null || true
+
+    # Create new Kubernetes Docker registry secret
+    echo "Creating new Kubernetes secret..."
+    kubectl create secret docker-registry {{ .Values.jit_ecr_secret_name }} \
+      --docker-server={{ .Values.registry_name }} \
+      --docker-username=AWS \
+      --docker-password="$REGISTRY_TOKEN" \
+      --namespace={{ .Values.namespace }}
+
+    # Get current date and time
+    CURRENT_DATE=$(date "+%Y-%m-%d %H:%M:%S")
+
+    echo "Registry credentials updated successfully on $CURRENT_DATE"

src/kubernetes/jit_ecr/templates/serviceaccount.yaml

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+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: sa-jit-ecr
+  namespace: {{ .Values.namespace }}