mongodb真的很脆弱，公司加個防火牆，馬上就不行了，撤掉也必須重啟，重啟還容易報錯

cd 到mongodb的安裝路徑 ，然後啟動

./mongod --dbpath=/data/mongodb/master/data --logpath=/data/mongodb/master/log/master.log                                     data和log是兩個資料夾，這裡可以隨意建

啟動有異常資訊

2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] MongoDB starting : pid=12882 port=27017 dbpath=/data/db 64-bit host=env-12
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] db version v3.4.1
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] git version: 5e103c4f5583e2566a45d740225dc250baacfbd7
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] allocator: tcmalloc
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] modules: none
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] build environment:
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten]     distmod: rhel70
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten]     distarch: x86_64
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten]     target_arch: x86_64
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] options: {}
2017-08-31T17:25:31.926+0800 I STORAGE  [initandlisten] exception in initAndListen: 29 Data directory /data/db not found., terminating
2017-08-31T17:25:31.926+0800 I NETWORK  [initandlisten] shutdown: going to close listening sockets...
2017-08-31T17:25:31.926+0800 I NETWORK  [initandlisten] shutdown: going to flush diaglog...
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] now exiting
2017-08-31T17:25:31.926+0800 I CONTROL  [initandlisten] shutting down with code:100
 

把data目錄下的.lock檔案刪掉，再執行啟動命令，然後 ss -nlpt|grep mongo  能看到pid，說明啟動成功了