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user22611
Asked: 2015-12-26 01:07:24 +0800 CST

SystemD: Run 3 instances of MongoDB

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My current setup:

mongodb

me@server:/lib/systemd/system$ cat mongodb.service 
[Unit]
Description=An object/document-oriented database
Documentation=man:mongod(1)

[Service]
User=mongodb
ExecStart=/usr/bin/mongod --config /etc/mongodb.conf

[Install]
WantedBy=multi-user.target

mongodb.homepage1

me@server:/lib/systemd/system$ cat mongodb.homepage1.service 
[Unit]
Description=An object/document-oriented database
Documentation=man:mongod(1)

[Service]
User=mongodb
ExecStart=/usr/bin/mongod --config /etc/mongodb.homepage1.conf

[Install]
WantedBy=multi-user.target

mongodb.homepage2

me@server:/lib/systemd/system$ cat mongodb.homepage2.service 
[Unit]
Description=An object/document-oriented database
Documentation=man:mongod(1)

[Service]
User=mongodb
ExecStart=/usr/bin/mongod --config /etc/mongodb.homepage2.conf

[Install]
WantedBy=multi-user.target

As you can see, all three files have the same structure.

Still mongodb starts on boot, whereas mongodb.homepage1 and mongodb.homepage2 do not.

Manual start works:

sudo reboot

# ... server reboots ...

sudo service mongodb start # not necessary, because this one starts automatically
sudo service mongodb.homepage1 start
sudo service mongodb.homepage2 start

All 3 are running on different ports configured through their different configuration files.

Why don't they start on boot?

boot

1 Answers

  1. Best Answer

    Make sure you have enabled your 2 custom services. To view a list of enabled and disabled services, you use this command:

    systemctl list-unit-files --type=service

    If they are disabled or not in the list, enable them:

    sudo systemctl enable mongodb.homepage1
sudo systemctl enable mongodb.homepage2
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