Add Alerting samples. (#41)

monitoring/snippets/.gitignore

@@ -0,0 +1 @@
+policies_backup.json

monitoring/snippets/README.md

@@ -1,3 +1,5 @@
+[//]: # "This README.md file is auto-generated, all changes to this file will be lost."
+[//]: # "To regenerate it, use `npm run generate-scaffolding`."
 <img src="https://avatars2.githubusercontent.com/u/2810941?v=3&s=96" alt="Google Cloud Platform logo" title="Google Cloud Platform" align="right" height="96" width="96"/>
 
 # Stackdriver Monitoring: Node.js Samples
@@ -10,6 +12,7 @@
 
 * [Before you begin](#before-you-begin)
 * [Samples](#samples)
+  * [Alert Policies](#alert-policies)
   * [Metrics](#metrics)
   * [Uptime Config](#uptime-config)
 
@@ -21,9 +24,56 @@ library's README.
 
 ## Samples
 
+### Alert Policies
+
+View the [source code][alerts_0_code].
+
+[![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-monitoring&page=editor&open_in_editor=samples/alerts.js,samples/README.md)
+
+__Usage:__ `node alerts.js --help`
+
+```
+alerts.js <command>
+
+Commands:
+  alerts.js backup <projectId>                          Save alert policies to a ./policies_backup.json file.
+  alerts.js restore <projectId>                         Restore alert policies from a ./policies_backup.json file.
+  alerts.js replace <alertPolicyName> <channelNames..>  Replace the notification channels of the specified alert policy.
+  alerts.js disable <projectId> [filter]                Disables policies that match the given filter.
+  alerts.js enable <projectId> [filter]                 Enables policies that match the given filter.
+
+Options:
+  --version          Show version number                                                                       [boolean]
+  --alertPolicyName                                                                                             [string]
+  --help             Show help                                                                                 [boolean]
+
+Examples:
+  node alerts.js backup my-project-id                           Backup policies.
+  node alerts.js restore my-project-id                          Restore policies.
+  node alerts.js replace                                        Replace the notification channels of the specified alert
+  projects/my-project-id/alertPolicies/12345 channel-1          policy.
+  channel-2 channel-3
+  node alerts.js disable my-project-id "(NOT                    Disables policies that match the given filter.
+  display_name.empty OR NOT description.empty) AND
+  user_labels='active'"
+  node alerts.js disable my-project-id "description:'cloud'"    Disables policies that match the given filter.
+  node alerts.js disable my-project-id                          Disables policies that match the given filter.
+  "display_name=monitoring.regex.full_match('Temp \d{4}')"
+  node alerts.js enable my-project-id "(NOT display_name.empty  Enables policies that match the given filter.
+  OR NOT description.empty) AND user_labels='active'"
+  node alerts.js enable my-project-id "description:'cloud'"     Enables policies that match the given filter.
+  node alerts.js enable my-project-id                           Enables policies that match the given filter.
+  "display_name=monitoring.regex.full_match('Temp \d{4}')"
+
+For more information, see https://cloud.google.com/monitoring/docs/
+```
+
+[alerts_0_docs]: https://cloud.google.com/monitoring/docs
+[alerts_0_code]: alerts.js
+
 ### Metrics
 
-View the [source code][metrics_0_code].
+View the [source code][metrics_1_code].
 
 [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-monitoring&page=editor&open_in_editor=samples/metrics.js,samples/README.md)
 
@@ -52,7 +102,7 @@ Commands:
 
 Options:
   --version        Show version number                                                                         [boolean]
-  --projectId, -p                                                                                               [string]
+  --projectId, -p                                                              [string] [default: "nodejs-docs-samples"]
   --help           Show help                                                                                   [boolean]
 
 Examples:
@@ -71,12 +121,12 @@ Examples:
 For more information, see https://cloud.google.com/monitoring/docs
 ```
 
-[metrics_0_docs]: https://cloud.google.com/monitoring/docs
-[metrics_0_code]: metrics.js
+[metrics_1_docs]: https://cloud.google.com/monitoring/docs
+[metrics_1_code]: metrics.js
 
 ### Uptime Config
 
-View the [source code][uptime_1_code].
+View the [source code][uptime_2_code].
 
 [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-monitoring&page=editor&open_in_editor=samples/uptime.js,samples/README.md)
 
@@ -86,19 +136,19 @@ __Usage:__ `node uptime.js --help`
 uptime.js <command>
 
 Commands:
-  uptime.js create <gceInstanceId> [projectId]        Creates an uptime check config.
+  uptime.js create <hostname> [projectId]             Creates an uptime check config.
   uptime.js list [projectId]                          Lists uptime check configs.
   uptime.js list-ips                                  Lists uptime check config IPs.
   uptime.js get <uptimeCheckConfigId> [projectId]     Gets an uptime check config.
   uptime.js delete <uptimeCheckConfigId> [projectId]  Deletes an uptime check config.
 
 Options:
   --version        Show version number                                                                         [boolean]
-  --projectId, -p                                                                                               [string]
+  --projectId, -p                                                              [string] [default: "nodejs-docs-samples"]
   --help           Show help                                                                                   [boolean]
 
 Examples:
-  node uptime.js create my-instance                             Create an uptime check for a "my-instance" GCE instance.
+  node uptime.js create mydomain.com                            Create an uptime check.
   node uptime.js list                                           List all uptime check configs.
   node uptime.js list "resource.type = gce_instance AND         List all uptime check configs for a specific GCE
   resource.label.instance_id = mongodb"                         instance.
@@ -109,8 +159,8 @@ Examples:
 For more information, see https://cloud.google.com/monitoring/uptime-checks/
 ```
 
-[uptime_1_docs]: https://cloud.google.com/monitoring/docs
-[uptime_1_code]: uptime.js
+[uptime_2_docs]: https://cloud.google.com/monitoring/docs
+[uptime_2_code]: uptime.js
 
-[shell_img]: //gstatic.com/cloudssh/images/open-btn.png
+[shell_img]: https://gstatic.com/cloudssh/images/open-btn.png
 [shell_link]: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-monitoring&page=editor&open_in_editor=samples/README.md