TRSS backup story (#345)

-related: #180
Signed-off-by: OscarQQ <[email protected]>

TestResultSummaryService/README.md

@@ -102,4 +102,19 @@ A build can have the following status in database:
 - `Done` - The build and its child builds are processed and stored.
 
 ## Plugins
-Plugins can be added. Please refer [Plugins ReadMe](./plugins/README.md) for implementation detail.
+Plugins can be added. Please refer [Plugins ReadMe](./plugins/README.md) for implementation detail.
+
+## Configure Crontab on server
+
+- step 1: run command `env`, copy the field SHELL and PATH
+- step 2: run command `crontab -e` to install a cron job, using SHELL and PATH value from step1
+
+    example cron job: 
+    ```
+    SHELL=/bin/bash
+    MAILTO=/home/oscar/log
+    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
+    0 8 * * 5 <path>/openjdk-test-tools/exportMongo.sh 
+    ```
+    This cron job will run exportMongo.sh once every week at Saturday 8am
+- step 3: run command `sudo chmod u+x exportMongo.sh` to grant cron access to shell scipt

exportMongo.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# find dump gzip that are older than 90 days and delete
+find /home/mongoBackup -mtime 90 -type f -name "dump*" -delete
+
+# export the whole db to gzip
+mongodump --gzip --archive=/home/mongoBackup/dump_`date "+%Y-%m-%d-%T"`.gz --db=exampleDb
+
+#restore using command   mongorestore --archive=<path to gzip> --db exampleDb --gzip