services: better status for sftp and turn

src/sftp.js

@@ -2,6 +2,7 @@
 
 exports = module.exports = {
     start,
+    status,
 
     DEFAULT_MEMORY_LIMIT: 256 * 1024 * 1024
 };
@@ -10,11 +11,13 @@ const apps = require('./apps.js'),
     assert = require('assert'),
     BoxError = require('./boxerror.js'),
     debug = require('debug')('box:sftp'),
+    docker = require('./docker.js'),
     hat = require('./hat.js'),
     infra = require('./infra_version.js'),
     paths = require('./paths.js'),
     safe = require('safetydance'),
     settings = require('./settings.js'),
+    services = require('./services.js'),
     shell = require('./shell.js'),
     system = require('./system.js'),
     volumes = require('./volumes.js');
@@ -98,3 +101,21 @@ async function start(existingInfra) {
     await shell.promises.exec('removeSftp', 'docker rm -f sftp || true');
     await shell.promises.exec('startSftp', runCmd);
 }
+
+async function status() {
+    const [error, container] = await safe(docker.inspect('sftp'));
+    if (error && error.reason === BoxError.NOT_FOUND) return { status: services.SERVICE_STATUS_STOPPED };
+    if (error) throw error;
+
+    const result = await docker.memoryUsage('sftp');
+
+    const status = container.State.Running
+        ? (container.HostConfig.ReadonlyRootfs ? services.SERVICE_STATUS_ACTIVE : services.SERVICE_STATUS_STARTING)
+        : services.SERVICE_STATUS_STOPPED;
+
+    return {
+        status,
+        memoryUsed: result.memory_stats.usage,
+        memoryPercent: parseInt(100 * result.memory_stats.usage / result.memory_stats.limit)
+    };
+}