Use a healthcheck as recommended by the docs

This implements some additional ordering of resources so that ones that
require the API are not run before the API is up.

Author: genebean

.fixtures.yml

@@ -16,3 +16,4 @@ fixtures:
         repo: https://github.com/puppetlabs/puppetlabs-yumrepo_core.git
         ref: 1.0.2
     forge_modules:
+      healthcheck: "puppet/healthcheck"

manifests/grafana.pp

@@ -54,4 +54,22 @@
     cwd         => '/usr/share/grafana',
     refreshonly => true,
   }
+
+  http_conn_validator { 'grafana-conn-validator' :
+    host     => 'localhost',
+    port     => $puppet_metrics_dashboard::grafana_http_port,
+    use_ssl  => $puppet_metrics_dashboard::use_dashboard_ssl,
+    test_url => '/public/img/grafana_icon.svg',
+    require  => [
+      Class['grafana'],
+      Exec['update Grafana admin password'],
+    ],
+  }
+
+  Http_conn_validator <| title == 'grafana-conn-validator' |>
+  -> Grafana_datasource <| tag == 'puppet_metrics_dashboard' |>
+
+  Http_conn_validator <| title == 'grafana-conn-validator' |>
+  -> Grafana_dashboard <| tag == 'puppet_metrics_dashboard' |>
+
 }

metadata.json

@@ -8,6 +8,10 @@
   "project_page": "https://github.com/puppetlabs/puppet_metrics_dashboard",
   "issues_url": "https://github.com/puppetlabs/puppet_metrics_dashboard/issues",
   "dependencies": [
+    {
+      "name": "puppet-healthcheck",
+      "version_requirement": ">= 0.4.1 < 1.0.0"
+    },
     {
       "name": "puppetlabs-stdlib",
       "version_requirement": ">= 1.0.0 < 6.0.0"

spec/spec_helper_acceptance.rb

@@ -27,6 +27,7 @@
       end
 
       on host, puppet('module', 'install', 'puppet-grafana')
+      on host, puppet('module', 'install', 'puppet-healthcheck')
       on host, puppet('module', 'install', 'puppetlabs-inifile')
       if fact('osfamily') == 'Debian'
         on host, puppet('module', 'install', 'puppetlabs-apt')