inputs/mongodb not parsing configs

[Jaff]

Bug report

Up to 1.2.1 this was working; in 1.3.0 and 1.3.1, getting error reading config.

Relevant telegraf.conf:

See https://gist.github.com/Jaff/3a2024afaf44b9b5a448090f46a94fc8

System info:

telegraf 1.3.0, 1.3.1 on Ubuntu 14.04.4 (x86_64)
[Include Telegraf version, operating system name, and other relevant details]

Steps to reproduce:

1. /etc/telegraf/telegraf.conf contains same data as we used in 1.2.1 version
2. /etc/telegraf/telegraf.d/monitor_mongodb.conf as used in 1.2.1 version

Expected behavior:

telegraf will collect data from mongodb and output to graphite log

Actual behavior:

telegraf unable to connect to mongodb

Additional info:

logs contain:
2017-06-05T20:56:30Z E! Error in plugin [inputs.mongodb]: Unable to parse to address '127.0.0.1:27017': parse 127.0.0.1:27017: first path segment in URL cannot contain colon

[Include gist of relevant config, logs, etc.]

Feature Request

Opening a feature request kicks off a discussion.

Proposal:

Current behavior:

Desired behavior:

Use case: [Why is this important (helps with prioritizing requests)]

[danielnelson]

Possible workaround is to use the mongodb:// uri scheme.

[Jaff]

Seems to be working OK using mongodb:// uri now with 1.3.0

[Jaff]

And likewise with 1.3.1

[danielnelson]

I'm going to reopen since this should still be fixed.

[danielnelson]

This appears to be caused by a change in go 1.8: golang/go#19297. They are not going to fix it since it was originally a bug and so I'll just change our default urls.

[danielnelson]

Same bug in the leofs plugin

[jackzampolin]

Should we fix this with documentation and reference the issue?

[danielnelson]

I did a combination of documentation and code. The old method should still work for now but it prompts you to use a url with scheme. For mongodb use mongodb://127.0.0.1:27017 and for leofs use udp://127.0.0.1:4020.