RHEL7系统自动启动mongo服务？

Question

我有一个RHEL7服务器，它是Mongo集群的一部分。有三个mongo进程，我想在系统启动时自动启动。一个独神，一个仲裁者和一个蒙哥斯：

• /usr/bin/mongo -f /etc/mongo_shard001.conf
• /usr/bin/mongod -f /etc/mongoarb.conf
• /usr/bin/mongos -f /etc/mongos.conf

我一直试图为这些命令创建systemd服务，例如

[Unit]
Description=mongo configuration server
After=network.target

[Service]
User=mongod
Group=mongod
ExecStart=/usr/bin/mongod -f /etc/mongoconf.conf

[Install]
WantedBy=multi-user.target

当我尝试做sudo systemctl daemon-reload && sudo systemctl start mongoconf时，我会得到这个错误

● mongoconf.service - mongo configuration server
   Loaded: loaded (/etc/systemd/system/mongoconf.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Thu 2017-02-02 14:38:34 AWST; 20s ago
  Process: 5114 ExecStart=/usr/bin/mongod -f /etc/mongoconf.conf (code=exited, status=1/FAILURE)
 Main PID: 5114 (code=exited, status=1/FAILURE)

Feb 02 14:38:34 mdb1 systemd[1]: Started mongo configuration server.
Feb 02 14:38:34 mdb1 systemd[1]: Starting mongo configuration server...
Feb 02 14:38:34 mdb1 systemd[1]: mongoconf.service: main process exited, code=exited, status=1/FAILURE
Feb 02 14:38:34 mdb1 systemd[1]: Unit mongoconf.service entered failed state.
Feb 02 14:38:34 mdb1 systemd[1]: mongoconf.service failed.

我还尝试使用带有pid文件的分叉类型：

[Unit]
Description=mongo configuration server
After=network.target

[Service]
User=mongod
Group=mongod
ExecStart=/usr/bin/mongod -f /etc/mongoconf.conf --pidfilepath /var/lib/mongoconf/pid --fork
Type=forking
PIDFile=/var/run/mongodb/mongoconf/pid

[Install]
WantedBy=multi-user.target

但却给出了这个错误

● mongoconf.service - mongo configuration server
   Loaded: loaded (/etc/systemd/system/mongoconf.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Thu 2017-02-02 14:45:36 AWST; 4s ago
  Process: 5256 ExecStart=/usr/bin/mongod -f /etc/mongoconf.conf --pidfilepath /var/lib/mongoconf/pid --fork (code=exited, status=1/FAILURE)
 Main PID: 5114 (code=exited, status=1/FAILURE)

Feb 02 14:45:36 mdb1 systemd[1]: Starting mongo configuration server...
Feb 02 14:45:36 mdb1 mongod[5256]: about to fork child process, waiting until server is ready for connections.
Feb 02 14:45:36 mdb1 mongod[5256]: forked process: 5258
Feb 02 14:45:36 mdb1 systemd[1]: mongoconf.service: control process exited, code=exited status=1
Feb 02 14:45:36 mdb1 systemd[1]: Failed to start mongo configuration server.
Feb 02 14:45:36 mdb1 systemd[1]: Unit mongoconf.service entered failed state.
Feb 02 14:45:36 mdb1 systemd[1]: mongoconf.service failed.

手动启动mongo配置很好，并创建了pid文件。

/usr/bin/mongod -f /etc/mongoconf.conf --pidfilepath /var/lib/mongoconf/pid --fork

我正在使用的mongod版本是来自mongodb.com的版本，我按照他们的安装指南安装了它。

db version v3.4.1
git version: 5e103c4f5583e2566a45d740225dc250baacfbd7
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013
allocator: tcmalloc
modules: none
build environment:
    distmod: rhel70
    distarch: x86_64
    target_arch: x86_64

从这次回购中

[mongodb-org-3.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc

我想知道我是不是走错了路，有更好的方法吗？

Answer 1

这是我的解决办法

使用以下行创建bash脚本

/usr/bin/mongod -f /etc/mongo_shard001.conf
/usr/bin/mongod -f /etc/mongoarb.conf
/usr/bin/mongos -f /etc/mongos.conf

然后将这一行添加到crontab中。

@reboot root cd /foldername && ./scriptname.sh

如果有人知道如何设置，systemd将是一个更好的解决方案。

蒙戈文件帮不上忙

Answer 2

我知道你说过rhel7，但是因为这是duckduckgo关于这个问题的唯一答案，这可能是有用的。在Ubuntu 15及以上：

sudo systemctl enable mongod.service