v12.0.0 - initial commit

packages/server/lib/new-admin/services/supervisor.js

@@ -0,0 +1,64 @@
+const xmlrpc = require('xmlrpc')
+const logger = require('../../logger')
+const { promisify } = require('util')
+
+// TODO new-admin: add the following to supervisor config
+// [inet_http_server]
+// port = 127.0.0.1:9001
+
+function getAllProcessInfo() {
+  const convertStates = state => {
+    // From http://supervisord.org/subprocess.html#process-states
+    switch (state) {
+      case 'STOPPED':
+        return 'STOPPED'
+      case 'STARTING':
+        return 'RUNNING'
+      case 'RUNNING':
+        return 'RUNNING'
+      case 'BACKOFF':
+        return 'FATAL'
+      case 'STOPPING':
+        return 'STOPPED'
+      case 'EXITED':
+        return 'STOPPED'
+      case 'UNKNOWN':
+        return 'FATAL'
+      default:
+        logger.error(`Supervisord returned an unsupported state: ${state}`)
+        return 'FATAL'
+    }
+  }
+
+  const client = xmlrpc.createClient({
+    host: 'localhost',
+    port: '9001',
+    path: '/RPC2',
+  })
+
+  client.methodCall[promisify.custom] = (method, params) => {
+    return new Promise((resolve, reject) =>
+      client.methodCall(method, params, (err, value) => {
+        if (err) reject(err)
+        else resolve(value)
+      }),
+    )
+  }
+
+  return promisify(client.methodCall)('supervisor.getAllProcessInfo', [])
+    .then(value => {
+      return value.map(process => ({
+        name: process.name,
+        state: convertStates(process.statename),
+        uptime:
+          process.statename === 'RUNNING' ? process.now - process.start : 0,
+      }))
+    })
+    .catch(error => {
+      if (error.code === 'ECONNREFUSED')
+        logger.error('Failed to connect to supervisord HTTP server.')
+      else logger.error(error)
+    })
+}
+
+module.exports = { getAllProcessInfo }