无法在CentOS 7上启动MongoDB 3.0.2服务 [英] Unable to start MongoDB 3.0.2 service on CentOS 7

问题描述

我们正在为Amazon EC2实例上的生产环境设置MongoDB服务器，但无法启动该服务.我已按照此文档进行设置.以下是我设置服务器的步骤:

We are setting up a MongoDB server for the production environment on Amazon EC2 instance, but could not able to start the service. I've followed this documentation for setup. Here are the steps, I've taken for setting up the server:

已添加到/etc/yum.repos.d/mongodb-org-3.0.repo

[mongodb-org-3.0]
name=MongoDB Repository
baseurl=http://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.0/x86_64/
gpgcheck=0
enabled=1

并使用sudo yum install -y mongodb-org-3.0.2

为数据，日记帐&创建了三个分区日志:

Created three partitions for data, journal & log:

sudo mkdir /mongo
sudo mkdir /mongo/data
sudo mkdir /mongo/log
sudo mkdir /mongo/journal

为三个单独的分区创建的文件系统:

Created file system for three separate partitions:

sudo mkfs.ext4 /dev/xvdb
sudo mkfs.ext4 /dev/xvdc
sudo mkfs.ext4 /dev/xvdd

在fstab中创建的条目用于重启:

Created entry in fstab for reboot:

echo '/dev/xvdb /mongo/data ext4 defaults,auto,noatime,noexec 0 0
/dev/xvdc /mongo/journal ext4 defaults,auto,noatime,noexec 0 0
/dev/xvdd /mongo/log ext4 defaults,auto,noatime,noexec 0 0' | sudo tee -a /etc/fstab

并安装分区:

sudo mount /mongo/data
sudo mount /mongo/journal
sudo mount /mongo/log

授予权限并创建链接

sudo chown mongod:mongod /mongo/data /mongo/journal /mongo/log
sudo ln -s /mongo/journal /mongo/data/journal

已配置ulimit&请提前阅读上面文档链接中提供的设置.验证的权限和分区:

Configured ulimit & read ahead settings as given in the documentation link above. Verified permissions and partitions:

[deployer@prod-mongo ~]$ df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda1      8.0G  1.3G  6.8G  16% /
devtmpfs        3.6G     0  3.6G   0% /dev
tmpfs           3.5G     0  3.5G   0% /dev/shm
tmpfs           3.5G   57M  3.4G   2% /run
tmpfs           3.5G     0  3.5G   0% /sys/fs/cgroup
/dev/xvdc       7.8G   36M  7.3G   1% /mongo/journal
/dev/xvdb       150G   51M  149G   1% /mongo/data
/dev/xvdd       3.9G   16M  3.6G   1% /mongo/log

权限:

[deployer@prod-mongo ~]$ ll /
total 32
lrwxrwxrwx.   1 root   root      7 Sep 29  2014 bin -> usr/bin
dr-xr-xr-x.   4 root   root   4096 Sep 29  2014 boot
drwxr-xr-x.  17 root   root   2860 May 11 12:11 dev
lrwxrwxrwx.   1 root   root      7 Sep 29  2014 lib -> usr/lib
lrwxrwxrwx.   1 root   root      9 Sep 29  2014 lib64 -> usr/lib64
drwxr-xr-x.   2 root   root      6 Jun 10  2014 mnt
drwxr-xr-x.   5 mongod mongod   41 May 11 05:06 mongo
drwxr-xr-x.  21 root   root    660 May 11 12:47 run
lrwxrwxrwx.   1 root   root      8 Sep 29  2014 sbin -> usr/sbin

内部/mongo

[deployer@prod-mongo ~]$ ll /mongo/
total 12
drwxr-xr-x. 3 mongod mongod 4096 May 11 07:33 data
drwxr-xr-x. 3 mongod mongod 4096 May 11 07:31 journal
drwxr-xr-x. 3 mongod mongod 4096 May 11 08:58 log

更改/etc/mongodb.conf

logpath=/mongo/log/mongod.log
dbpath=/mongo/data

当我在做sudo service mongod start时，出现此错误:

and when I'm doing: sudo service mongod start, I'm getting this error:

Starting mongod (via systemctl):  Job for mongod.service failed. See 'systemctl status mongod.service' and 'journalctl -xn' for details.
                                                           [FAILED]

进一步记录:

[deployer@prod-mongo ~]$ sudo systemctl status mongod.service

mongod.service - SYSV: Mongo is a scalable, document-oriented database.
   Loaded: loaded (/etc/rc.d/init.d/mongod)
   Active: failed (Result: exit-code) since Tue 2015-05-12 04:42:10 UTC; 42s ago
  Process: 22881 ExecStart=/etc/rc.d/init.d/mongod start (code=exited, status=1/FAILURE)

May 11 04:42:10 ip-xx-xx-xx-xx.local runuser[22887]: pam_unix(runuser:session): session opened for user mongod by (uid=0)
May 11 04:42:10 ip-xx-xx-xx-xx.localdomain runuser[22887]: pam_unix(runuser:session): session closed for user mongod
May 11 04:42:10 ip-xx-xx-xx-xx.local mongod[22881]: Starting mongod: [FAILED]
May 11 04:42:10 ip-xx-xx-xx-xx.local systemd[1]: mongod.service: control process exited, code=exited status=1
May 11 04:42:10 ip-xx-xx-xx-xx.local systemd[1]: Failed to start SYSV: Mongo is a scalable, document-oriented database..
May 11 04:42:10 ip-xx-xx-xx-xx.local systemd[1]: Unit mongod.service entered failed state.

我关注了各种文章和博客文章以及StackExchange的答案，但没有得到任何解决方案.我想念什么吗?

I've followed various articles and blog posts and StackExchange answers but didn't get any solution. Am I missing something?

更新:如果我直接从普通用户那里运行mongodb服务，例如:sudo mongod --logpath ~/mongod.log --dbpath ~/mongodata，则表明该服务正常启动.

Update: If I'm directly running the mongodb service from the normal user something like this: sudo mongod --logpath ~/mongod.log --dbpath ~/mongodata, then this service is starting properly.

我们尝试将pid文件的路径更改为另一个目录，该目录也无济于事.

We tried changing the path of the pid file to another directory, that didn't help either.

推荐答案

以防万一，MongoDB启动遇到任何相同的问题，这是注释的主题

In case, anyone encountered the same issue with MongoDB startup, here is the thread of comments https://jira.mongodb.org/browse/SERVER-18439. This is scheduled to be fixed in 3.1.

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