feat: adding multi-arch image builds and kubectl manifest deployment

kubectl-apply/action.yaml

@@ -0,0 +1,104 @@
+name: Kubectl Apply (in-repo manifests)
+description: Validate KUBE_CONFIG, install kubectl, and apply Kubernetes manifest(s) that live inside the repository.
+
+inputs:
+  kube_config:
+    description: Full kubeconfig YAML content (pass via secrets)
+    required: true
+  manifest:
+    description: Path (relative to repo root) of a single manifest file to apply. Usable alongside `manifests`.
+    required: false
+    default: ""
+  manifests:
+    description: >-
+      Space- or comma-separated list of manifest file paths (relative to repo
+      root) to apply. Each is applied with its own `kubectl apply -f`.
+    required: false
+    default: ""
+  namespace:
+    description: >-
+      Optional namespace override applied with `-n`. Manifests may also declare
+      their own namespace in metadata; this only adds `-n` when non-empty.
+    required: false
+    default: ""
+  kube_version:
+    description: Kubernetes version to download (stable, or a specific version like v1.31.0)
+    required: false
+    default: stable
+
+runs:
+  using: composite
+  steps:
+    - name: Check KUBE_CONFIG validity
+      shell: bash
+      env:
+        KUBE_CONFIG: ${{ inputs.kube_config }}
+      run: |
+        if [ -z "${KUBE_CONFIG}" ] || [ "${KUBE_CONFIG// }" = "" ]; then
+          echo "KUBE_CONFIG is not set or is empty."
+          exit 1
+        fi
+
+    - name: Check out repository
+      uses: actions/checkout@v4
+
+    - name: Download and install kubectl
+      shell: bash
+      env:
+        KUBE_VERSION: ${{ inputs.kube_version }}
+      run: |
+        apt-get update -y
+        apt-get install -y curl
+        if [ "${KUBE_VERSION}" = "stable" ]; then
+          KUBE_VER="$(curl -L -s https://dl.k8s.io/release/stable.txt)"
+        else
+          KUBE_VER="${KUBE_VERSION}"
+        fi
+        curl -LO "https://dl.k8s.io/release/${KUBE_VER}/bin/linux/amd64/kubectl"
+        install -m 0755 kubectl /usr/local/bin/kubectl
+        kubectl version --client
+
+    - name: Set up kubeconfig
+      shell: bash
+      env:
+        KUBE_CONFIG: ${{ inputs.kube_config }}
+      run: |
+        echo "${KUBE_CONFIG}" > kubeconfig.yaml
+        kubectl --kubeconfig=kubeconfig.yaml cluster-info
+
+    - name: Apply manifests
+      shell: bash
+      env:
+        MANIFEST: ${{ inputs.manifest }}
+        MANIFESTS: ${{ inputs.manifests }}
+        NAMESPACE: ${{ inputs.namespace }}
+      run: |
+        NS_FLAG=""
+        if [ -n "${NAMESPACE}" ] && [ "${NAMESPACE// }" != "" ]; then
+          NS_FLAG="-n ${NAMESPACE}"
+        fi
+
+        # Collect files from both inputs (manifests splits on comma or space).
+        FILES=""
+        if [ -n "${MANIFEST}" ] && [ "${MANIFEST// }" != "" ]; then
+          FILES="${FILES} ${MANIFEST}"
+        fi
+        if [ -n "${MANIFESTS}" ] && [ "${MANIFESTS// }" != "" ]; then
+          for f in $(echo "${MANIFESTS}" | tr ',' ' '); do
+            FILES="${FILES} ${f}"
+          done
+        fi
+
+        if [ -z "${FILES// }" ]; then
+          echo "::error::No manifest provided. Set the \`manifest\` or \`manifests\` input."
+          exit 1
+        fi
+
+        for f in ${FILES}; do
+          if [ ! -f "${f}" ]; then
+            echo "::error::Manifest not found in repo: ${f}"
+            exit 1
+          fi
+          echo "== applying ${f} =="
+          kubectl --kubeconfig=kubeconfig.yaml apply -f "${f}" ${NS_FLAG}
+        done