feat: Added helm chart for updating AWS ECR secrets in Kubernetes

charts/renew-ecr-k8s-creds/Chart.yaml

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+apiVersion: v2
+name: renew-ecr-k8s-creds
+description: A Helm chart for updating AWS ECR secrets in Kubernetes
+version: 0.1.0
+

charts/renew-ecr-k8s-creds/README.md

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+# renew-ecr-k8s-cred
+
+A Helm chart for renewing AWS ECR credentials and updating them in a Kubernetes secret.
+
+## Introduction
+
+This Helm chart creates a CronJob in Kubernetes to periodically renew AWS Elastic Container Registry (ECR) credentials and update them in a Kubernetes secret. This is useful for ensuring that your ECR credentials are always up to date, especially in environments where long-running workloads need continuous access to private ECR repositories.
+
+## Prerequisites
+
+- Kubernetes 1.16+
+- Helm 3.0+
+- An AWS account with permissions to assume the specified role and access ECR
+- The AWS CLI installed in the container image
+
+## Installation
+
+### Add the Helm Repository
+
+```sh
+# AWS credentials configuration
+aws:
+  accessKey: "your-aws-access-key"          # AWS Access Key ID of IAM role for authentication
+  secretKey: "your-aws-secret-key"          # AWS Secret Access Key of IAM role for authentication
+  region: "your-aws-region"                 # AWS region where your resources are located
+  roleArn: "your-aws-role-arn"              # ARN of the AWS role to assume for getting temporary credentials
+  sessionName: "your-session-name"          # Session name for the assumed role
+
+# Kubernetes configuration
+kubernetes:
+  secretName: "your-secret-name"            # Name of the Kubernetes secret to create or update with ECR credentials
+
+# ECR (Elastic Container Registry) configuration
+ecr:
+  account: "your-aws-account"               # AWS account ID where your ECR is located
+  region: "your-ecr-region"                 # AWS region of your ECR
+
+# CronJob configuration
+cronjob:
+  schedule: "0 */12 * * *"                  # Cron schedule for the job to run (every 12 hours)
+
+# ServiceAccount configuration
+serviceAccount:
+  name: "renew-ecr-k8s-creds-sa"            # Name of the ServiceAccount to create or use
+```

charts/renew-ecr-k8s-creds/templates/job.yaml

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+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: renew-ecr-k8s-creds
+  namespace: {{ .Release.Namespace }}
+spec:
+  schedule: "{{ .Values.cronjob.schedule }}"
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          serviceAccountName: {{ .Values.serviceAccount.name }}
+          containers:
+            - name: renew-ecr-k8s-creds
+              image: amazon/aws-cli:2.13.15
+              command: ["/bin/bash", "/scripts/update-secret.sh"]
+              volumeMounts:
+                - name: script
+                  mountPath: /scripts   
+          restartPolicy: Never
+          volumes:
+            - name: script
+              configMap:
+                name: renew-ecr-k8s-creds-script

charts/renew-ecr-k8s-creds/templates/role.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  namespace: {{ .Release.Namespace }}
+  name: renew-ecr-k8s-creds-role
+rules:
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["get", "create", "patch"]

charts/renew-ecr-k8s-creds/templates/rolebinding.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: renew-ecr-k8s-creds-rolebinding
+  namespace:  {{ .Release.Namespace }}
+subjects:
+- kind: ServiceAccount
+  name: {{ .Values.serviceAccount.name }}
+  namespace:  {{ .Release.Namespace }}
+roleRef:
+  kind: Role
+  name: renew-ecr-k8s-creds-role
+  apiGroup: rbac.authorization.k8s.io

charts/renew-ecr-k8s-creds/templates/script-configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: renew-ecr-k8s-creds-script
+  namespace: {{ .Release.Namespace }}
+data:
+  update-secret.sh: |
+    #!/bin/bash
+
+    # Install kubectl
+    echo "Installing kubectl..."
+    curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
+    install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
+
+    # Install jq
+    echo "Installing jq..."
+    yum install -y jq
+
+    secret_exists() {
+      kubectl get secret "{{ .Values.kubernetes.secretName }}" --namespace="{{ .Release.Namespace }}" &> /dev/null
+      return $?
+    }
+
+    echo "Aws Configure..."
+    aws configure set aws_access_key_id "{{ .Values.aws.accessKey }}"
+    aws configure set aws_secret_access_key "{{ .Values.aws.secretKey }}"
+    aws configure set region "{{ .Values.aws.region }}"
+    aws configure set output "json"
+
+    echo "Assuming a Role..."
+    ROLE_OUTPUT=$(aws sts assume-role --role-arn "{{ .Values.aws.roleArn }}" --role-session-name "{{ .Values.aws.sessionName }}")
+
+    echo "Now fetching the access_key, secret_key & session_token..."
+    AWS_ACCESS_KEY_ID=$(echo "$ROLE_OUTPUT" | jq -r '.Credentials.AccessKeyId')
+    AWS_SECRET_ACCESS_KEY=$(echo "$ROLE_OUTPUT" | jq -r '.Credentials.SecretAccessKey')
+    AWS_SESSION_TOKEN=$(echo "$ROLE_OUTPUT" | jq -r '.Credentials.SessionToken')
+
+    export AWS_ACCESS_KEY_ID
+    export AWS_SECRET_ACCESS_KEY
+    export AWS_SESSION_TOKEN
+
+    if secret_exists; then
+      echo "Secret already exists, patching the secret..."
+      kubectl patch secret "{{ .Values.kubernetes.secretName }}" --namespace="{{ .Release.Namespace }}" --type='json' -p='[{"op": "replace", "path": "/data/.dockerconfigjson", "value":"'$(echo -n "{\"auths\":{\"{{ .Values.ecr.account }}.dkr.ecr.{{ .Values.ecr.region }}.amazonaws.com\":{\"username\":\"AWS\",\"password\":\"$(aws ecr get-login-password)\"}}}" | base64 | tr -d '\n')'"}]'
+    else
+      echo "Secret does not exist, creating the secret..."
+      kubectl create secret docker-registry "{{ .Values.kubernetes.secretName }}" \
+        --docker-server="{{ .Values.ecr.account }}.dkr.ecr.{{ .Values.ecr.region }}.amazonaws.com" \
+        --docker-username=AWS \
+        --docker-password="$(aws ecr get-login-password)" \
+        --namespace="{{ .Release.Namespace }}"
+    fi
+
+    unset AWS_ACCESS_KEY_ID
+    unset AWS_SECRET_ACCESS_KEY
+    unset AWS_SESSION_TOKEN

charts/renew-ecr-k8s-creds/templates/serviceaccount.yaml

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+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ .Values.serviceAccount.name }}
+  namespace: {{ .Release.Namespace }}
+

charts/renew-ecr-k8s-creds/values.yaml

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+# AWS credentials configuration
+aws:
+  accessKey: "your-aws-access-key"          # AWS Access Key ID of IAM role for authentication
+  secretKey: "your-aws-secret-key"          # AWS Secret Access Key of IAM role for authentication
+  region: "your-aws-region"                 # AWS region where your resources are located
+  roleArn: "your-aws-role-arn"              # ARN of the AWS role to assume for getting temporary credentials
+  sessionName: "your-session-name"          # Session name for the assumed role
+
+# Kubernetes configuration
+kubernetes:
+  secretName: "your-secret-name"            # Name of the Kubernetes secret to create or update with ECR credentials
+
+# ECR (Elastic Container Registry) configuration
+ecr:
+  account: "your-aws-account"               # AWS account ID where your ECR is located
+  region: "your-ecr-region"                 # AWS region of your ECR
+
+# CronJob configuration
+cronjob:
+  schedule: "0 */12 * * *"                  # Cron schedule for the job to run (every 12 hours)
+
+# ServiceAccount configuration
+serviceAccount:
+  name: "renew-ecr-k8s-creds-sa"            # Name of the ServiceAccount to create or use