Ubuntu – Failed to start mongod.service: Unit mongod.service not found

16.04mongodb

For whatever reason, whenever I try to start MongoDB as a service (sudo service mongod start) I get the following error:

Failed to start mongod.service: Unit mongod.service not found.
I followed Installation Steps mention following link
mongo db installation failed

system> sudo systemctl start mongodb
Failed to start mongodb.service: Unknown unit: mongodb.service

And when I try sudo mongod:

MongoDB shell version: 3.2.13 connecting to: - 
2017-06-03T16:19:28.513+0530 W NETWORK [thread1] 
Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: errno:111 Connection refused 
2017-06-03T16:19:28.514+0530 E QUERY [thread1] 
Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed : connect@src/mongo/shell/mongo.js:229:14 @(connect):1:6 exception: connect failed

And when I try mongod --repair:

2017-06-03T16:32:35.514+0530 I CONTROL [initandlisten] 
MongoDB starting : pid=17423 port=27017 dbpath=/data/db 64-bit host=sid-Ideapad-Z570 2017-06-03T16:32:35.514+0530 I 
CONTROL [initandlisten] db version v3.2.13 [listen] target_arch: x86_64 2017-06-03T16:32:35.514+0530 I 
CONTROL [initandlisten] options: {} 2017-06-03T16:32:35.540+0530 I STORAGE [initandlisten] exception in initAndListen: 29 Data directory /data/db not found., terminating

Best Answer

I reinstalled mongod-org, since my data will still stay safe.

The problem was that my system couldn't find mongod.service when I ran sudo service mongod status.

Running this fixed it and restored the service:

sudo systemctl enable mongod

Then all I had to do was copy my correct config to /etc/mongod.conf and run

sudo service mongod restart

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Ubuntu – MongoDB – Unit mongod.service can’t found – Ubuntu 16.04

The next step for this is to make sure you have a unit file for the service.

Run this command: ls /lib/systemd/system

If you see mongod.service, you should be good to go. If you need to know what that file should look like, take a look at this guide.

In theory, that should be the last thing you need to do to get it working. Basically, this is just a file to tell the system how to put the service into various states, and the little house-cleaning tasks that need to be carried out.

Ubuntu – mongod: unrecognized service , mongod.service is present already

I had the same problem after pulling the ubuntu:17:04 docker image and installing mongodb-org

It looks like Mongodb created a systemd startup file which was already replaced by upstart.

As a workaround:

Create a new file /etc/init/mongod.conf (requires sudo rights). You can use: sudo gedit /etc/init/mongod.conf

Paste the following contents into the newly created upstart file:

# Ubuntu upstart file at /etc/init/mongod.conf

# Recommended ulimit values for mongod or mongos
# See http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
#
limit fsize unlimited unlimited
limit cpu unlimited unlimited
limit as unlimited unlimited
limit nofile 64000 64000
limit rss unlimited unlimited
limit nproc 64000 64000

kill timeout 300 # wait 300s between SIGTERM and SIGKILL.

pre-start script
  DAEMONUSER=${DAEMONUSER:-mongodb}
  if [ ! -d /var/lib/mongodb ]; then
    mkdir -p /var/lib/mongodb && chown mongodb:mongodb /var/lib/mongodb
  fi
  if [ ! -d /var/log/mongodb ]; then
    mkdir -p /var/log/mongodb && chown mongodb:mongodb /var/log/mongodb
  fi
  touch /var/run/mongodb.pid
  chown $DAEMONUSER /var/run/mongodb.pid
end script

start on runlevel [2345]
stop on runlevel [06]

script
  ENABLE_MONGOD="yes"
  CONF=/etc/mongod.conf
  DAEMON=/usr/bin/mongod
  DAEMONUSER=${DAEMONUSER:-mongodb}
  DAEMONGROUP=${DAEMONGROUP:-mongodb}

  if [ -f /etc/default/mongod ]; then . /etc/default/mongod; fi

  # Handle NUMA access to CPUs (SERVER-3574)
  # This verifies the existence of numactl as well as testing that the command works
  NUMACTL_ARGS="--interleave=all"
  if which numactl >/dev/null 2>/dev/null && numactl $NUMACTL_ARGS ls / >/dev/null 2>/dev/null
  then
    NUMACTL="$(which numactl) -- $NUMACTL_ARGS"
    DAEMON_OPTS=${DAEMON_OPTS:-"--config $CONF"}
  else
    NUMACTL=""
    DAEMON_OPTS="-- "${DAEMON_OPTS:-"--config $CONF"}
  fi

  if [ "x$ENABLE_MONGOD" = "xyes" ]
  then
    exec start-stop-daemon --start \
        --chuid $DAEMONUSER:$DAEMONGROUP \
        --pidfile /var/run/mongodb.pid \
        --make-pidfile \
        --exec $NUMACTL $DAEMON $DAEMON_OPTS
  fi
end script

Now, you can use the following commands:

sudo service mongod start

sudo service mongod stop

sudo service mongod status

reference: https://github.com/mongodb/mongo/blob/master/debian/mongod.upstart

Best Answer

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Ubuntu – MongoDB – Unit mongod.service can’t found – Ubuntu 16.04

Ubuntu – mongod: unrecognized service , mongod.service is present already

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