Issues with creating an ohai plugin

Douglas_Land · January 29, 2013, 10:36pm

Hi all,

I apologize in advance because I’m guessing this is something dumb as
I’m pretty green to ruby. I’m trying to create a custom ohai plugin.
I’ve looked at examples and can’t for the life of me figure out what
I’m doing wrong here:

github.com

looprock/ohai_plugins/blob/master/customjava.rb

provides "customjava"

# detect non-provider versions of java on the system
begin
  customjava Mash.new

  # start by assuming we don't have java installed
  customjava[:result] = false
  #customjava "do"

  # see if there's a java binary in the path
  if system("which java  > /dev/null 2>&1") == true
        customjava[:result] = true
        #customjava "ray"
  end
  # see if there are any procs running
  ps = `ps -C java|grep -v "PID TTY"|wc -l`.to_i
  if ps > 0
    customjava[:result] = true
    #customjava "me"

This file has been truncated. show original

When I try to query this I get:

knife node show cheftest.vast.com -a customjava -Fj
{
“customjava”: null
}

Any help would be greatly appreciated.

John_Alberts · January 29, 2013, 10:56pm

I'm not sure if this matters, but the examples all use symbols instead of
strings for the keys and I've always used symbols as well. I notice you
have: customjava["java_home"] and customjava["result"].

John

On Tue, Jan 29, 2013 at 4:36 PM, Douglas Land dsl@looprock.com wrote:

Hi all,

I apologize in advance because I'm guessing this is something dumb as
I'm pretty green to ruby. I'm trying to create a custom ohai plugin.
I've looked at examples and can't for the life of me figure out what
I'm doing wrong here:

ohai_plugins/customjava.rb at master · looprock/ohai_plugins · GitHub

When I try to query this I get:

knife node show cheftest.vast.com -a customjava -Fj
{
"customjava": null
}

Any help would be greatly appreciated.

--
John Alberts

Charles_Sullivan · January 29, 2013, 11:08pm

Doug! What is up man. Glad to see you're using Chef.

Are you sure that ohai_plugins are being processed on the server you're
running chef-client on? I believe you need the ohai recipe in your
runlist. Send us the output from your chef-client debug log..

--Charlie

On Tue, Jan 29, 2013 at 4:56 PM, John Alberts john.m.alberts@gmail.comwrote:

I'm not sure if this matters, but the examples all use symbols instead of
strings for the keys and I've always used symbols as well. I notice you
have: customjava["java_home"] and customjava["result"].

John

On Tue, Jan 29, 2013 at 4:36 PM, Douglas Land dsl@looprock.com wrote:

Hi all,

I apologize in advance because I'm guessing this is something dumb as
I'm pretty green to ruby. I'm trying to create a custom ohai plugin.
I've looked at examples and can't for the life of me figure out what
I'm doing wrong here:

ohai_plugins/customjava.rb at master · looprock/ohai_plugins · GitHub

When I try to query this I get:

knife node show cheftest.vast.com -a customjava -Fj
{
"customjava": null
}

Any help would be greatly appreciated.

--
John Alberts

--
Charles Sullivan
charlie.sullivan@gmail.com

Douglas_Land · January 30, 2013, 4:53am

John,

You're absolutely right and as a matter of fact I have both in that
recipe as I copied a bad version up, but here's the current one I just
re-pushed:

github.com

looprock/ohai_plugins/blob/master/customjava.rb

provides "customjava"

# detect non-provider versions of java on the system
begin
  customjava Mash.new

  # start by assuming we don't have java installed
  customjava[:result] = false
  #customjava "do"

  # see if there's a java binary in the path
  if system("which java  > /dev/null 2>&1") == true
        customjava[:result] = true
        #customjava "ray"
  end
  # see if there are any procs running
  ps = `ps -C java|grep -v "PID TTY"|wc -l`.to_i
  if ps > 0
    customjava[:result] = true
    #customjava "me"

This file has been truncated. show original

Charles,

Hey man, damn I knew there was someone else I should have been asking
about this. I'm pretty sure it's loading. Here's the relevant INFO
output from the client.log:

[2013-01-30T02:35:48+01:00] INFO: *** Chef 10.16.2 ***
[2013-01-30T02:35:49+01:00] INFO: Run List is
[recipe[vast-rundeck-users], role[vastbase], recipe[ohai],
recipe[zabbix], recipe[vast-installrvm]]
[2013-01-30T02:35:49+01:00] INFO: Run List expands to
[vast-rundeck-users, vast-ntp, vast-chef-client, ohai, zabbix,
vast-installrvm]
[2013-01-30T02:35:49+01:00] INFO: HTTP Request Returned 404 Not Found:
No routes match the request: /reports/nodes/cheftest.vast.com/runs
[2013-01-30T02:35:49+01:00] INFO: Starting Chef Run for cheftest.vast.com
[2013-01-30T02:35:49+01:00] INFO: Running start handlers
[2013-01-30T02:35:49+01:00] INFO: Start handlers complete.
[2013-01-30T02:35:49+01:00] INFO: Loading cookbooks [apache2, aws,
build-essential, database, firewall, mysql, ohai, openssl, postgresql,
ufw, vast-chef-client, vast-installrvm, vast-ntp, vast-rundeck-users,
xfs, yum, zabbix]
[2013-01-30T02:35:49+01:00] WARN: Missing gem 'right_aws'
[2013-01-30T02:35:49+01:00] INFO: ohai plugins will be at:
/etc/chef/ohai_plugins
[2013-01-30T02:35:49+01:00] INFO: Processing
remote_directory[/etc/chef/ohai_plugins] action create (ohai::default
line 27)
[2013-01-30T02:35:49+01:00] INFO: Processing
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] action create
(dynamically defined)
[2013-01-30T02:35:49+01:00] INFO:
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] backed up to
/var/chef/backup/etc/chef/ohai_plugins/customjava.rb.chef-20130130023549
[2013-01-30T02:35:49+01:00] INFO:
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] removed backup at
/var/chef/backup/./etc/chef/ohai_plugins/customjava.rb.chef-20130129215618
[2013-01-30T02:35:49+01:00] INFO:
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] owner changed to 0
[2013-01-30T02:35:49+01:00] INFO:
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] group changed to 0
[2013-01-30T02:35:49+01:00] INFO:
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] mode changed to
644
[2013-01-30T02:35:49+01:00] INFO:
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] created file
/etc/chef/ohai_plugins/customjava.rb
[2013-01-30T02:35:49+01:00] INFO: Processing
cookbook_file[/etc/chef/ohai_plugins/README] action create
(dynamically defined)
[2013-01-30T02:35:49+01:00] INFO: Processing ohai[custom_plugins]
action reload (ohai::default line 42)
[2013-01-30T02:35:50+01:00] INFO: ohai[custom_plugins] reloaded
...
[2013-01-30T02:35:53+01:00] INFO: Processing ohai[custom_plugins]
action nothing (ohai::default line 42)
...
[2013-01-30T02:35:54+01:00] INFO: Chef Run complete in 5.092088632 seconds
[2013-01-30T02:35:54+01:00] INFO: Running report handlers
[2013-01-30T02:35:54+01:00] INFO: Report handlers complete

client.rb:
log_level :info
log_location STDOUT
chef_server_url 'http://chef.server.com:4000'
validation_client_name 'chef-validator'
Ohai::Config[:plugin_path] << '/etc/chef/ohai_plugins'

[root@cheftest ~]# /opt/chef/embedded/bin/irb
irb(main):001:0> require 'ohai'
=> true
irb(main):002:0> Ohai::Config[:plugin_path] << '/etc/chef/ohai_plugins'
=> ["/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/plugins",
"/etc/chef/ohai_plugins"]
irb(main):003:0> o = Ohai::System.new
=> #<Ohai::System:0x00000000cf4a90 @data={}, @seen_plugins={},
@providers={}, @plugin_path="", @hints={}>
irb(main):004:0> o.all_plugins
=> true
irb(main):005:0> o.seen_plugins
=> {"os"=>true, "kernel"=>true, "ruby"=>true, "languages"=>true,
"network"=>true, "hostname"=>true, "linux::hostname"=>true,
"linux::network"=>true, "dmi"=>true, "ohai"=>true,
"virtualization"=>true, "linux::virtualization"=>true, "cloud"=>true,
"ec2"=>true, "rackspace"=>true, "eucalyptus"=>true, "passwd"=>true,
"c"=>true, "groovy"=>true, "command"=>true, "keys"=>true,
"dmi_common"=>true, "perl"=>true, "network_listeners"=>true,
"java"=>true, "python"=>true, "ip_scopes"=>true, "lua"=>true,
"php"=>true, "chef"=>true, "mono"=>true, "uptime"=>true,
"ohai_time"=>true, "platform"=>true, "linux::platform"=>true,
"linux::lsb"=>true, "erlang"=>true, "linux::cpu"=>true,
"linux::memory"=>true, "linux::ssh_host_key"=>true,
"linux::block_device"=>true, "linux::ps"=>true,
"linux::filesystem"=>true, "linux::uptime"=>true,
"linux::kernel"=>true, "customjava"=>true}
irb(main):006:0> o.customjava
=> nil

There are a few exceptions, but this seems me like it's chef looking
in the default path before the path added in
Ohai::Config[:plugin_path] << '/etc/chef/ohai_plugins':

[2013-01-30T05:41:13+01:00] DEBUG: Loading plugin customjava
[2013-01-30T05:41:13+01:00] DEBUG: Plugin customjava threw exception
#<IOError: Cannot open or read
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/plugins/customjava.rb!>
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/mixin/from_file.rb:31:in
from_file' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:215:in block in require_plugin'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:210:in
each' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:210:in require_plugin'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:139:in
block (2 levels) in all_plugins' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:132:in each'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:132:in
block in all_plugins' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:130:in each'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:130:in
all_plugins' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/client.rb:215:in run_ohai'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/client.rb:405:in
do_run' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/client.rb:176:in run'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application.rb:140:in
run_chef_client' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application/client.rb:274:in block in run_application'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application/client.rb:267:in
loop' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application/client.rb:267:in run_application'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application.rb:72:in
run' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/bin/chef-client:26:in <top (required)>'
/usr/bin/chef-client:23:in load' /usr/bin/chef-client:23:in '
[2013-01-30T05:41:13+01:00] DEBUG: Loading plugin customjava
…
[2013-01-30T05:41:14+01:00] INFO: Processing
cookbook_file[/etc/chef/ohai_plugins/customjava.rb] action create
(dynamically defined)
…
[2013-01-30T05:41:14+01:00] DEBUG: Loading plugin customjava
[2013-01-30T05:41:14+01:00] DEBUG: Plugin customjava threw exception
#<IOError: Cannot open or read
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/plugins/customjava.rb!>
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/mixin/from_file.rb:31:in
from_file' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:215:in block in require_plugin'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:210:in
each' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:210:in require_plugin'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:139:in
block (2 levels) in all_plugins' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:132:in each'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:132:in
block in all_plugins' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:130:in each'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/ohai-6.14.0/lib/ohai/system.rb:130:in
all_plugins' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/provider/ohai.rb:39:in block in action_reload'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/why_run.rb:63:in
call' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/why_run.rb:63:in block in converge!'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/why_run.rb:61:in
each' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/why_run.rb:61:in converge!'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/provider.rb:136:in
converge' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/provider.rb:125:in run_action'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/resource.rb:593:in
run_action' /var/chef/cache/cookbooks/ohai/recipes/default.rb:51:in from_file'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/from_file.rb:30:in
instance_eval' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/from_file.rb:30:in from_file'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/cookbook_version.rb:558:in
load_recipe' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/language_include_recipe.rb:46:in load_recipe'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/language_include_recipe.rb:33:in
block in include_recipe' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/language_include_recipe.rb:27:in each'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/mixin/language_include_recipe.rb:27:in
include_recipe' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/run_context.rb:79:in block in load'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/run_context.rb:75:in
each' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/run_context.rb:75:in load'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/client.rb:198:in
setup_run_context' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/client.rb:418:in do_run'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/client.rb:176:in
run' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application.rb:140:in run_chef_client'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application/client.rb:274:in
block in run_application' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application/client.rb:267:in loop'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application/client.rb:267:in
run_application' /opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/lib/chef/application.rb:72:in run'
/opt/chef/embedded/lib/ruby/gems/1.9.1/gems/chef-10.16.2/bin/chef-client:26:in
<top (required)>' /usr/bin/chef-client:23:in load'
/usr/bin/chef-client:23:in `'
[2013-01-30T05:41:14+01:00] DEBUG: Loading plugin customjava

On Tue, Jan 29, 2013 at 5:08 PM, Charles Sullivan
charlie.sullivan@gmail.com wrote:

Doug! What is up man. Glad to see you're using Chef.

Are you sure that ohai_plugins are being processed on the server you're
running chef-client on? I believe you need the ohai recipe in your runlist.
Send us the output from your chef-client debug log..

--Charlie

On Tue, Jan 29, 2013 at 4:56 PM, John Alberts john.m.alberts@gmail.com
wrote:

I'm not sure if this matters, but the examples all use symbols instead of
strings for the keys and I've always used symbols as well. I notice you
have: customjava["java_home"] and customjava["result"].

John

On Tue, Jan 29, 2013 at 4:36 PM, Douglas Land dsl@looprock.com wrote:

Hi all,

I apologize in advance because I'm guessing this is something dumb as
I'm pretty green to ruby. I'm trying to create a custom ohai plugin.
I've looked at examples and can't for the life of me figure out what
I'm doing wrong here:

ohai_plugins/customjava.rb at master · looprock/ohai_plugins · GitHub

When I try to query this I get:

knife node show cheftest.vast.com -a customjava -Fj
{
"customjava": null
}

Any help would be greatly appreciated.

--
John Alberts

--
Charles Sullivan
charlie.sullivan@gmail.com

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