After mcollective update agent does not work anymore

[Andreas Dvorak]

Dear all,

I have an self written mcollective agent that does nocht work anymore, after the Puppet und MCollective update. All other agents are working.

Does anybody has an idea?

The client is running:

mcollective 2.6.0

puppet 3.7.1

Centos 6

locate ehyp.rb

/usr/local/libexec/mcollective/mcollective/agent/ehyp.rb

/usr/local/libexec/mcollective/mcollective/application/ehyp.rb

If the server has

Centos 6

mcollective 2.6.0

puppet 3.7.1

it does work

If server hast

Centos 6

mcollective-package-agent-4.4.0

puppet-agent-1.9.3

it does not work.

mcollective.log

D, [2017-10-19T10:44:27.294257 #122124] DEBUG -- : base.rb:120:in `block (2 levels) in validate_filter?' Failing based on agent ehyp

server.cfg

/usr/local/libexec/mcollective:/usr/libexec/mcollective:/opt/puppetlabs/mcollective/plugins

Regards,

Andreas

[R.I.Pienaar]

On Thu, Oct 19, 2017, at 10:49, Andreas Dvorak wrote:
> Dear all,
>
> I have an self written mcollective agent that does nocht work anymore,
> after the Puppet und MCollective update. All other agents are working.
> Does anybody has an idea?
>
>
> The client is running:
> mcollective 2.6.0
> puppet 3.7.1
> Centos 6
>
> locate ehyp.rb
> /usr/local/libexec/mcollective/mcollective/agent/ehyp.rb
> /usr/local/libexec/mcollective/mcollective/application/ehyp.rb

The early logs just as the daemon starts shows you what it finds and why
it might not load something it does find, put it in debug and show us

[Andreas Dvorak]

Hi,

thank you. That is a good tip. The log says:

D, [2017-10-19T12:50:04.972364 #13809] DEBUG -- : agents.rb:104:in `block in findagentfile' Found ehyp at /usr/libexec/mcollective/mcollective/agent/ehyp.rb

D, [2017-10-19T12:50:04.972530 #13809] DEBUG -- : pluginmanager.rb:167:in `loadclass' Loading MCollective::Agent::Ehyp from mcollective/agent/ehyp.rb

D, [2017-10-19T12:50:04.974482 #13809] DEBUG -- : pluginmanager.rb:167:in `loadclass' Loading MCollective::Util::UnprivilegedAgent from mcollective/util/unprivilegedagent.rb

E, [2017-10-19T12:50:04.976625 #13809] ERROR -- : pluginmanager.rb:171:in `rescue in loadclass' Failed to load MCollective::Util::UnprivilegedAgent: cannot load such file -- pr0cess

E, [2017-10-19T12:50:04.976730 #13809] ERROR -- : pluginmanager.rb:171:in `rescue in loadclass' Failed to load MCollective::Agent::Ehyp: cannot load such file -- pr0cess

E, [2017-10-19T12:50:04.976815 #13809] ERROR -- : agents.rb:71:in `rescue in loadagent' Loading agent ehyp failed: cannot load such file -- pr0cess

D, [2017-10-19T12:50:04.976978 #13809] DEBUG -- : agents.rb:104:in `block in findagentfile' Found ehyp at /usr/libexec/mcollective/mcollective/agent/ehyp.rb

D, [2017-10-19T12:50:04.977093 #13809] DEBUG -- : pluginmanager.rb:167:in `loadclass' Loading MCollective::Agent::Ehyp from mcollective/agent/ehyp.rb

D, [2017-10-19T12:50:04.978885 #13809] DEBUG -- : pluginmanager.rb:167:in `loadclass' Loading MCollective::Util::UnprivilegedAgent from mcollective/util/unprivilegedagent.rb

E, [2017-10-19T12:50:04.980883 #13809] ERROR -- : pluginmanager.rb:171:in `rescue in loadclass' Failed to load MCollective::Util::UnprivilegedAgent: cannot load such file -- pr0cess

E, [2017-10-19T12:50:04.980981 #13809] ERROR -- : pluginmanager.rb:171:in `rescue in loadclass' Failed to load MCollective::Agent::Ehyp: cannot load such file -- pr0cess

E, [2017-10-19T12:50:04.981084 #13809] ERROR -- : agents.rb:71:in `rescue in loadagent' Loading agent ehyp failed: cannot load such file -- pr0cess

It finds the agent, but can not load it.

The first line the the agent is:

MCollective::Util.loadclass("MCollective::Util::UnprivilegedAgent")

What is wrong with that line?

If I remove that line the error is:

E, [2017-10-19T13:17:18.922324 #42703] ERROR -- : pluginmanager.rb:171:in `rescue in loadclass' Failed to load MCollective::Agent::Ehyp: cannot load such file -- open4

#MCollective::Util.loadclass("MCollective::Util::UnprivilegedAgent")

require 'open4'

require 'rubygems'

>rpm -ql ruby-open4

/usr/local/lib64/ruby/site_ruby

/usr/local/share/ruby/site_ruby

/usr/local/share/ruby/site_ruby/open4.rb

The open4 is installed, but can not be loaded. Why not?

Can you please help me?

[R.I.Pienaar]

The problem appears to be:

cannot load such file -- pr0cess

there's some dependency like a gem that is not found in this
installation of puppet

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[Andreas Dvorak]

pr0cess is installed. The older mcollective works fine with that location.

>rpm -ql ruby-pr0cess

/usr/lib/ruby/site_ruby/1.8

/usr/lib64/ruby/site_ruby/1.8/x86_64-linux

/usr/lib64/ruby/site_ruby/1.8/x86_64-linux/pr0cess.so

Do you know how to configure the location to the file or should I be it to an other place?

[R.I.Pienaar]

It depends on your ruby that is running mcollective, find the exact path
to the ruby binary and run:

ruby -e 'p $:'

and see if the place this file is matches where its looking, you can
also just try:

ruby -r pr0cess -e 'puts "hello"'

but be sure to use the same ruby path mcollective use

[Andreas Dvorak]

thank you that was great help

the rpm puppet-agent bringt the ruby version 2.1

/opt/puppetlabs/puppet/bin/ruby  -e 'p $:' 

["/opt/puppetlabs/puppet/lib/ruby/site_ruby/2.1.0", "/opt/puppetlabs/puppet/lib/ruby/site_ruby/2.1.0/x86_64-linux", "/opt/puppetlabs/puppet/lib/ruby/site_ruby", "/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/2.1.0", "/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/2.1.0/x86_64-linux", "/opt/puppetlabs/puppet/lib/ruby/vendor_ruby", "/opt/puppetlabs/puppet/lib/ruby/2.1.0", "/opt/puppetlabs/puppet/lib/ruby/2.1.0/x86_64-linux"]

So the file /usr/lib64/ruby/site_ruby/1.8/x86_64-linux/pr0cess.so can not be read and the file is not compatible the version 2.1