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bitkot
Asked: 2019-03-02 00:16:58 +0800 CST

Monit is getting false negative for mongo http host checkup

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I am trying to create a monit config file to monitor if mongodb is running.

Here's my config file.

check process mongod with pidfile /var/run/mongodb/mongod.pid
   group mongodb
   start program = "/sbin/start mongod"
   stop  program = "/sbin/stop mongod"
   if failed host 127.0.0.1 port 27017 protocol http
     and request "/" with timeout 10 seconds then restart

I always get the following error and it restarts mongodb.

  port response time           FAILED to [localhost]:27017 type TCP/IP protocol HTTP

I checked and verified mongodb running. I event tried connecting to mongodb using curl. Here's the command I executed to verify http connection to the mongo is working.

curl -v localhost:27017

Here's the output I am getting.

* Rebuilt URL to: localhost:27017/
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 27017 (#0)
> GET / HTTP/1.1
> Host: localhost:27017
> User-Agent: curl/7.58.0
> Accept: */*
>
* HTTP 1.0, assume close after body
< HTTP/1.0 200 OK
< Connection: close
< Content-Type: text/plain
< Content-Length: 85
<
It looks like you are trying to access MongoDB over HTTP on the native driver port.
* Closing connection 0

Not sure what I am doing wrong.

The same config file is working on ubuntu 14.4, but it does not working ubuntu 18.4.

mongodb

1 Answers

  1. By some reason I had false negative response for MongoDB on CentOS 6.10

    That fixed with new protocol check, that implemented in Monit

      if failed host 127.0.0.1 port 27017 protocol mongodb
     then restart

    Notice new protocol name mongodb

    That simply works fine

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