[skywalking-nodejs] 10/23: Report hostname as service instance

[ke...@apache.org]

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kezhenxu94 pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/skywalking-nodejs.git

commit 863434b7ba12e542171c3090804dc248b1780599
Author: kezhenxu94 <ke...@163.com>
AuthorDate: Tue Jun 23 23:27:25 2020 +0800

    Report hostname as service instance
---
 src/config/AgentConfig.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/config/AgentConfig.ts b/src/config/AgentConfig.ts
index 56f010b..f50a7bc 100644
--- a/src/config/AgentConfig.ts
+++ b/src/config/AgentConfig.ts
@@ -17,17 +17,23 @@
  *
  */
 
+import * as os from 'os';
+
 export type AgentConfig = {
   serviceName?: string;
   serviceInstance?: string;
   collectorAddress?: string;
   authorization?: string;
   maxBufferSize?: number;
-}
+};
 
 export default {
   serviceName: process.env.SERVICE_NAME || 'your-nodejs-service',
-  serviceInstance: process.env.SERVICE_INSTANCE || 'your-node-js-instance',
+  serviceInstance:
+    process.env.SERVICE_INSTANCE ||
+    ((): string => {
+      return os.hostname();
+    })(),
   collectorAddress: process.env.COLLECTOR_ADDRESS || '127.0.0.1:11800',
   authorization: process.env.AUTHORIZATION,
   maxBufferSize: process.env.MAX_BUFFER_SIZE || '1000',