[Puppet Users] Custom providers
Hi,
I have a custom provider that seems to run ok in isolation by itself.
In addition, puppet does not complain at all when it runs. However,
when I ensure => installed a package the desired package is never
installed.
There are a few differences between this and something such as the gem
provider, most importantly, I couldn't find anyway to get the provider
to run as a different user without doing direct system call.
Here's the provider
Puppet::Type.type(:package).provide :npm, :parent =>
Puppet::Provider::Package do
desc "node.js package management with npm"
commands :npm_cmd => "/home/node/opt/bin/npm"
raise Puppet::Error, "The npm provider can only be used as root" if
Process.euid != 0
def self.npm_list(hash)
begin
s = `sudo -u node sh -c \"export PATH=/home/node/opt/bin:$
{PATH}; npm ls installed\"`
list = s.split("\n").collect do |set|
if npm_hash = npm_split(set)
npm_hash[:provider] = :npm
if npm_hash[:name] == hash[:justme]
npm_hash
else
nil
end
else
nil
end
end.compact
rescue Puppet::ExecutionFailure => detail
raise Puppet::Error, "Could not list npm packages: #{detail}"
end
list.shift
end
def self.npm_split(desc)
split_desc = desc.split(/ /)
installed = split_desc[0]
name = installed.split(/@/)[0]
version = installed.split(/@/)[1]
if (name.nil? || version.nil?)
Puppet.warning "Could not match #{desc}"
nil
else
return {
:name => name,
:ensure => version
}
end
end
def install
output = `sudo -u node sh -c \"export PATH=/home/node/opt/bin:$
{PATH}; npm install http-console\"`
if output =~ /npm not ok/
raise Puppet::ExecutionFailure, "Failed to install
#{resource[:name]}"
end
end
def uninstall
output = `sudo -u node sh -c \"export PATH=/home/node/opt/bin:$
{PATH}; npm uninstall #{resource[:name]}\"`
if output =~ /npm not ok/
raise Puppet::ExecutionFailure, "Failed to uninstall
#{resource[:name]}"
end
end
def query
version = nil
self.class.npm_list(:justme => resource[:name])
end
end
Does anybody have an idea what's going wrong?
The other problem I'm having is that I have to manually copy the
provider to puppet lib from the module lib.
Thanks.
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[Puppet Users] Re: Custom providers
On Jan 6, 4:01 pm, pl wrote:
> def install
> output = `sudo -u node sh -c \"export PATH=/home/node/opt/bin:$
> {PATH}; npm install http-console\"`
> if output =~ /npm not ok/
> raise Puppet::ExecutionFailure, "Failed to install
> #{resource[:name]}"
> end
> end
Note that this was a hard-coded package (http-console) I added just to
see if it would install. It didn't.
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[Puppet Users] Re: Custom providers
Hi,
So, after setting pluginsync = true I manage to get this working, but
only executing correctly as puppetd --test
Except that it only functions correctly when run as puppetd --test,
when I run it as the puppet service the custom provider does not do
anything.
This seems odd.
The only notice I have in /var/log/messages is
"Provider npm has not defined the 'instances' class method"
Is that required?
On Jan 6, 4:10 pm, pl wrote:
> On Jan 6, 4:01 pm, pl wrote:
>
> > def install
> > output = `sudo -u node sh -c \"export PATH=/home/node/opt/bin:$
> > {PATH}; npm install http-console\"`
> > if output =~ /npm not ok/
> > raise Puppet::ExecutionFailure, "Failed to install
> > #{resource[:name]}"
> > end
> > end
>
> Note that this was a hard-coded package (http-console) I added just to
> see if it would install. It didn't.
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[Puppet Users] Re: Custom providers
Hi,
> Puppet::Provider::Package defines the prefetch class method. This is
> called at the beginning of the puppet run to find matches between existing
> packages and the one you described in your manifest. Prefetch calls
> instances which should return an array of provider instances. One
> provider instance for each package with the appropiate property_hash
> {ensure => "whatever-version"}. If you dont know how to implement it try
> with returning an empty array like hpux.rb does.
Thanks.
I still have this problem that I can't run puppet as a daemon and
install packages as any other user. Trying to sudo inside the custom
provider fails if puppet is running as a daemon.
Is there no way around that?
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[Puppet Users] Re: Custom providers
Hi,
> Puppet::Util::SUIDManager.asuser("username", "group") do
> # do stuff here as different user
> end
Not sure this works how you suggested as this
Puppet::Util::SUIDManager.asuser("userx", "userx") do
execpipe("whoami") do |output|
Will report root, not userx.
I'll check the source.
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[Puppet Users] Re: Custom providers
Hi,
> Can you instrument your code to
> dump Process.uid and Process.gid from Ruby-space in the block? That
> way we can help narrow down where things are going wrong.
Process.uid was telling me 500, which was the intended user. whoami
inside the execpipe was root though.
I've ended up doing this
def self.exec_as_user(op, pkg)
Puppet::Util::SUIDManager.asuser("node", "node") do
s = execute ["my", "command", "and", "args"]
s.split("\n").collect do | line |
yield line
end
end
end
which is doing what I want
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[Puppet Users] force backup of config files
This is the situation:
We have a bunch of config files. We check if mtime changed.
The line written in syslog is trapped by a monitoring tool and someone
is warned.
This works fine...
What we want is
1. to backup the file when mtime has changed (and keep x versions)
2. execute a diff between new file and last backup and send it by
mail to so.
I don't see any way to do 1.
If I try in the file type ... backup => puppet ... it doesn't work.
The doc says it will be backed up before a change ( for ex with
source => ... ) but I don't want to change it.
I can do sth like:
file { "test.txt": ... checksum => mtime }
exec{ "myscript": ... subscribe => File["test.txt"], refreshonly =>
true }
with script "myscript" doing a backup, a diff and send the mail, but I
don't want to reinvent everything.
How can I use a filebucket ?
NB: these config changes are made by a automatic deploiement system,
so we cannot manage it in Puppet. But we want to be warn when a change
occurs to avoid "accidental" manual changes...
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