Add optional exceptions regex to avoid to retry.

This is useful when the user (a puppet provider) is expecting a error.
With this it doesn't have to wait for the long retry cycle to have its
error back.  This replace the awkward mechanism in
self.request_without_retry which was dynamically mangling
request_timeout and disabled even legit retry.

Examples of such function are self.fetch_user, self.fetch_project in the
keystone provider.

Change-Id: I589da0100ad3ccf3abf17ac8b26c827793ace484
Related-Bug: 1597357

lib/puppet/provider/openstack.rb

@@ -48,7 +48,7 @@ class Puppet::Provider::Openstack < Puppet::Provider
         openstack_command *args
       end
     rescue Timeout::Error
-      raise Puppet::ExecutionFailure, "Command: 'openstack #{args.inspect}' has been running for more then #{command_timeout(action)} seconds"
+      raise Puppet::ExecutionFailure, "Command: 'openstack #{args.inspect}' has been running for more than #{command_timeout(action)} seconds"
     end
   end
 
@@ -71,8 +71,13 @@ class Puppet::Provider::Openstack < Puppet::Provider
 
   # Returns an array of hashes, where the keys are the downcased CSV headers
   # with underscores instead of spaces
-  def self.request(service, action, properties, credentials=nil)
+  #
+  # @param options [Hash] Other options
+  # @options :no_retry_exception_msgs [Array<Regexp>,Regexp] exception without retries
+  def self.request(service, action, properties, credentials=nil, options={})
     env = credentials ? credentials.to_env : {}
+    no_retry = options[:no_retry_exception_msgs]
+
     Puppet::Util.withenv(env) do
       rv = nil
       end_time = current_time + request_timeout
@@ -121,6 +126,12 @@ class Puppet::Provider::Openstack < Puppet::Provider
           end
 
           raise exception if no_retry_actions.include? action
+          if no_retry
+            no_retry = [no_retry] unless no_retry.is_a?(Array)
+            no_retry.each do |nr|
+              raise exception if exception.message.match(nr)
+            end
+          end
           debug "Non-fatal error: '#{exception.message}'. Retrying for #{end_time - current_time} more seconds"
           sleep retry_sleep
           retry_count += 1

lib/puppet/provider/openstack/auth.rb

@@ -29,7 +29,7 @@ module Puppet::Provider::Openstack::Auth
     RCFILENAME
   end
 
-  def request(service, action, properties=nil)
+  def request(service, action, properties=nil, options={})
     properties ||= []
     set_credentials(@credentials, get_os_vars_from_env)
     unless @credentials.set?
@@ -39,7 +39,7 @@ module Puppet::Provider::Openstack::Auth
     unless @credentials.set?
       raise(Puppet::Error::OpenstackAuthInputError, 'Insufficient credentials to authenticate')
     end
-    super(service, action, properties, @credentials)
+    super(service, action, properties, @credentials, options)
   end
 
   def set_credentials(creds, env)

releasenotes/notes/feature_add_exclusion_to_retry_mechanism-2acb52fa25bd315c.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Add the possibility to exclude some exception from retry
+    mechanism. It helps to fix `bug 1597357
+    <https://bugs.launchpad.net/puppet-keystone/+bug/1597357>`__