Add k8s Wordpress

.gitignore

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+.build/
+

.gitmodules

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+[submodule "k8s/vendor/marketplace-tools"]
+	path = k8s/vendor/marketplace-tools
+	url = https://github.com/GoogleCloudPlatform/marketplace-k8s-app-tools

k8s/wordpress/Makefile

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+APP_NAME = wordpress
+AGENT_REPO ?= ../../../ubbagent
+
+include ../vendor/marketplace-tools/gcloud.Makefile
+
+include ../vendor/marketplace-tools/crd.Makefile
+include ../vendor/marketplace-tools/app.Makefile
+
+app/build:: .build/deployer .build/init .build/marketplace-ubbagent
+
+.build/deployer: deployer/* manifest/* $(MARKETPLACE_BASE_BUILD)/deployer-kubectl $(MARKETPLACE_BASE_BUILD)/controller $(APP_BUILD)/registry_prefix | app/setup
+	docker build \
+	    --build-arg MARKETPLACE_REGISTRY="$(MARKETPLACE_REGISTRY)" \
+	    --tag "$(APP_DEPLOYER_IMAGE)" \
+	    -f deployer/Dockerfile \
+	    .
+	gcloud docker -- push "$(APP_DEPLOYER_IMAGE)"
+	@touch "$@"
+
+.build/init: init/* $(APP_BUILD)/registry_prefix | app/setup
+	cd init \
+	&& docker build \
+	      --tag "$(APP_REGISTRY)/init" \
+	      .
+	gcloud docker -- push "$(APP_REGISTRY)/init"
+	@touch "$@"
+
+.build/marketplace-ubbagent: $(AGENT_REPO)/* $(AGENT_REPO)/**/* $(MARKETPLACE_BASE_BUILD)/registry_prefix  | base/setup
+	cd "$(AGENT_REPO)" \
+	&& docker build \
+	      --tag "$(MARKETPLACE_REGISTRY)/ubbagent" \
+	      .
+	gcloud docker -- push "$(MARKETPLACE_REGISTRY)/ubbagent"
+	@touch "$@"

k8s/wordpress/README.md

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+*This directory contains an example Kubernetes application (app) based on
+WordPress for the purpose of demonstrating app integration with
+Google Cloud Marketplace. **Not intended for actual use!***
+
+*Content below is intended as a template for end-user documentation. Work in
+progress.*
+
+# Overview
+
+WordPress is a free and open-source content management system (CMS) based on PHP
+and MySQL...
+
+# Installation
+
+## Quick install with Google Cloud Marketplace
+
+Get up and running with a few clicks! Install this WordPress app to a
+Google Kubernetes Engine cluster using Google Cloud Marketplace. Follow the
+on-screen instructions:
+*TODO: link to solution details page*
+
+## Command line instructions
+
+Follow these instructions to install WordPress from the command line.
+
+### Prerequisites
+
+- Setup cluster
+  - Permissions
+- Setup kubectl
+- Install Application Resource
+- Acquire License
+
+*TODO: add details above*
+
+### Commands
+
+Set environment variables (modify if necessary):
+```
+export APP_INSTANCE_NAME=wordpress-1
+export NAMESPACE=default
+```
+
+Expand manifest template:
+```
+cat manifest/* | envsubst > expanded.yaml
+```
+
+Run kubectl:
+```
+kubectl apply -f expanded.yaml
+```
+
+*TODO: fix instructions*
+
+# Backups
+
+*TODO: instructions for backups*
+
+# Upgrades
+
+*TODO: instructions for upgrades*

k8s/wordpress/deployer/Dockerfile

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+ARG MARKETPLACE_REGISTRY
+FROM ${MARKETPLACE_REGISTRY}/deployer_kubectl_base
+
+ADD manifest/* /data/manifest/

k8s/wordpress/init/Dockerfile

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+FROM launcher.gcr.io/google/debian9
+
+COPY metering.php.tmpl /
+COPY agent-config.yaml /
+COPY init.sh /
+
+CMD ["/init.sh"]

k8s/wordpress/init/agent-config.yaml

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+metrics:
+- name: requests
+  type: int
+  aggregation:
+    bufferSeconds: 60
+  endpoints:
+  - name: disk
+- name: instance_time
+  type: int
+  aggregation:
+    bufferSeconds: 60
+  endpoints:
+  - name: disk
+endpoints:
+- name: disk
+  disk:
+    reportDir: $AGENT_REPORT_DIR
+    expireSeconds: 3600
+sources:
+- name: instance_time
+  heartbeat:
+    metric: instance_time
+    intervalSeconds: 10
+    value:
+      int64Value: 10

k8s/wordpress/init/init.sh

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+#!/bin/bash
+#
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+if [ -z "$AGENT_LOCAL_PORT" ]; then
+  echo "AGENT_LOCAL_PORT environment variable must be set"
+  exit 1
+fi
+
+if [ ! -d "/var/www/html" ]; then
+  echo "/var/www/html directory must be mounted"
+  exit 1
+fi
+
+if [ ! -d "/etc/ubbagent" ]; then
+  echo "/etc/ubbagent directory must be mounted"
+  exit 1
+fi
+
+# Expand and copy Wordpress metering plugin.
+mkdir -p /var/www/html/wp-content/mu-plugins
+sed "s/%%AGENT_LOCAL_PORT%%/$AGENT_LOCAL_PORT/g" /metering.php.tmpl > /var/www/html/wp-content/mu-plugins/metering.php
+
+# Copy the metering agent config.
+cp /agent-config.yaml /etc/ubbagent/config.yaml

k8s/wordpress/init/metering.php.tmpl

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+<?php
+/*
+ * Copyright 2018 Google LLC
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @package marketplace_metering
+ * @version 1.0
+ */
+/*
+Plugin Name: Usage Metering
+Plugin URI: https://cloud.google.com/launcher
+Description: Wordpress usage metering.
+Author: Google LLC
+Version: 1.0
+Author URI: https://cloud.google.com/
+*/
+
+const AGENT_PORT = %%AGENT_LOCAL_PORT%%;
+
+/**
+ * Returns the current time in ISO8601 format with microsecond resolution.
+ */
+function now() {
+    list($usec, $sec) = explode(" ", microtime());
+    return date("Y-m-d\TH:i:s", $sec) . substr($usec, 1, 8) . date("P", $sec);
+}
+
+/**
+ * Returns the metering agent url with an optional path component.
+ */
+function agent_url($path) {
+  $port = AGENT_PORT;
+  return esc_url_raw( "http://localhost:$port/$path" );
+}
+
+/**
+ * Returns the metering agent report url.
+ */
+function report_url() {
+  return agent_url('report');
+}
+
+/**
+ * Returns the metering agent status url.
+ */
+function status_url() {
+  return agent_url('status');
+}
+
+/*
+ * Reports a single request to the metering agent.
+ */
+function report_request() {
+  $now = now();
+  $body = array(
+    'name' => 'requests',
+    'startTime' => $now,
+    'endTime' => $now,
+    'value' => array( 'int64Value' => 1 )
+  );
+  $args = array(
+    'headers' => array( 'Content-Type' => 'application/json' ),
+    'body' => json_encode( $body )
+  );
+
+  $response = wp_remote_post( report_url(), $args);
+  $response_code = wp_remote_retrieve_response_code( $response );
+
+  return $response_code == 200;
+}
+
+/**
+ * A 'wp' action that reports requests for singular post/page views.
+ */
+function handle_view() {
+  if (is_singular()) {
+    report_request();
+  }
+}
+
+/**
+ * Renders the Metering Status widget.
+ */
+function usage_metering_status_widget_display() {
+  $response = wp_remote_get(status_url());
+  $error = '';
+  $status = NULL;
+  if (is_wp_error($request)) {
+    $error = 'Cannot reach agent';
+  } else {
+    $body = wp_remote_retrieve_body($response);
+    $status = json_decode($body, true);
+    if ($status["currentFailureCount"] > 0) {
+      $error = 'Agent is failing to report usage';
+    }
+    $lastSuccess = DateTime::createFromFormat('Y-m-d\TH:i:s+', $status['lastReportSuccess']);
+    $now = new DateTime();
+    $successInterval = $now->diff($lastSuccess)->format('%ad %hh %im %ss');
+  }
+
+  if ($error == '') {
+    $current_status = '<font color="green">SUCCESS</font>';
+  } else {
+    $current_status = "<font color=\"red\">FAILURE: $error</font>";
+  }
+
+  // Widget HTML
+  ?>
+  <h3>Reporting Health</h3>
+  <p><?= $current_status ?></p>
+
+  <? if ($status != null) : ?>
+  <h3>Status Data</h3>
+  <table>
+    <tr>
+      <td><b>Last report success</b></td>
+      <td><?= $successInterval ?> ago</td>
+    </tr>
+    <tr>
+      <td><b>Current failures</b></td>
+      <td><?= $status['currentFailureCount'] ?></td>
+    </tr>
+    <tr>
+      <td><b>Total failures</b></td>
+      <td><?= $status['totalFailureCount'] ?></td>
+    </tr>
+  </table>
+  <? endif; ?>
+  <?
+}
+
+/**
+ * Registers the Metering Status widget.
+ */
+function register_usage_metering_status_widget() {
+  wp_add_dashboard_widget(
+    'usage_metering_status_widget',
+    'Usage Metering Status',
+    'usage_metering_status_widget_display'
+  );
+}
+
+// Action registrations.
+add_action('wp', 'handle_view');
+add_action('wp_dashboard_setup', 'register_usage_metering_status_widget');
+
+?>