From 65b05f6527da95f294c2571276891a71c657d3aa Mon Sep 17 00:00:00 2001
From: Michael Montgomery <mmontg1@gmail.com>
Date: Thu, 10 Dec 2020 15:14:05 -0600
Subject: [PATCH] Add database state metric Optimize dockerfile Add
 .dockerignore to speed up builds, ignoring .git, and node_modules

---
 .dockerignore |  2 ++
 Dockerfile    |  5 ++++-
 metrics.js    | 18 +++++++++++++++++-
 3 files changed, 23 insertions(+), 2 deletions(-)
 create mode 100644 .dockerignore

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..85dcc16
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+.git
+node_modules
diff --git a/Dockerfile b/Dockerfile
index 9ba929c..3b2bb0d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,11 +8,14 @@ RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
 # Copy dependency definitions
-COPY package.json *.js /usr/src/app/
+COPY package.json /usr/src/app/
 
 # Install dependecies
 RUN npm install --production
 
+# Copy application files
+COPY *.js /usr/src/app/
+
 # Expose the port the app runs in
 EXPOSE 4000
 
diff --git a/metrics.js b/metrics.js
index 3801372..af08d11 100644
--- a/metrics.js
+++ b/metrics.js
@@ -203,6 +203,21 @@ from sys.dm_os_sys_memory`,
     }
 };
 
+const mssql_database_state = {
+    metrics: {
+        mssql_database_state: new client.Gauge({name: 'mssql_database_state', help: 'State of databases: 0 = ONLINE, 1 = RESTORING, 2 = RECOVERING 3 = RECOVERY_PENDING 4 = SUSPECT 5 = EMERGENCY 6 = OFFLINE 7 = COPYING 10 = OFFLINE_SECONDARY', labelNames: ['database']})
+    },
+    query: `select name, state from sys.databases;`,
+    collect: function (rows, metrics) {
+        for (let i = 0; i < rows.length; i++) {
+            const row = rows[i];
+            const database = row[0].value;
+            const state = row[1].value;
+            metrics.mssql_database_state.set({database: database}, state);
+        }
+    }
+};
+
 const metrics = [
     mssql_instance_local_time,
     mssql_connections,
@@ -214,7 +229,8 @@ const metrics = [
     mssql_io_stall,
     mssql_batch_requests,
     mssql_os_process_memory,
-    mssql_os_sys_memory
+    mssql_os_sys_memory,
+    mssql_database_state,
 ];
 
 module.exports = {