Swift configuration parameter audit

This change is the result of an audit through the config parameters
provided by swift and how/if they are addressed in the swift
documentation. The documentation being the sample config files in
the /etc directory or the documentation.

This change is only concerned with the config files in etc/ next
I will look at the documentation in the doc/ folder.

This change makes the following assumptions:
  - Unless stated otherwise, the commented out parameter in the
    sample configuration is the default for swift.

  - When the default in the code differs from that of the sample
    configuration, the default in the code is correct.

Container reconciler:
  Parameter: interval
    - code: 30
    - config: 300
  Result: config = 30

Object Expirer:
  Parameter: recon_cache_path
    - code: /var/cache/swift
    - config: Parameter missing
  Result: Add parameter

swift-dispersion-populate && swift-dispersion-report
  Parameter: auth_version
    - code: 1.0
    - config: 2.0 (due to being a confusing example of how to setup
                   version 2.0).
  Result: Added 'auth_version = 1.0' to the right section (showing
          default and make the sample configuration for auth version
          2.0 easier to understand.

swift-drive-audit:
  Parameter: log_file_pattern
    - code: /var/log/kern.*[!.][!g][!z]
    - config: /var/log/kern*
  Result: config = /var/log/kern.*[!.][!g][!z]

  NOTE: swift-drive-audit uses a parameter called device_dir which
        defaults to '/srv/node'. In all other swift binaries/services
        there is a similar parameter called devices which stores the
        same thing. This is an inconsistency which I haven't fixed
        as this could break existing swift clusters out in the wild.

Proxy Server:
  Parameter: object_chunk_size
    - code: 65536
    - config: 8192
  Result: config = 65536

  Parameter: client_chunk_size
    - code: 65536
    - config: 8192
  Result: config = 65536

  Parameter: strict_cors_mode
    - code: True
    - config: No parameter
  Result: config = True

Account and Container replicator configuration confusion:
  NOTES:
    The account and container replicators have parameters:
      - interval
      - run_pause

    Both of these are loaded into the same variable in code:
      self.interval = int(conf.get('interval') or
                          conf.get('run_pause') or 30)

    If a user sets both to different values then interval is used.
  Result: Update the configuration to make this more clear.

DocImpact
Change-Id: Iaadbb1a6284f8b3e0801bc343b29772f70f4bf6e

etc/account-server.conf-sample

@@ -110,6 +110,8 @@ use = egg:swift#recon
 # reclaim_age = 604800
 #
 # Time in seconds to wait between replication passes
+# Note: if the parameter 'interval' is defined then it will be used in place
+# of run_pause.
 # run_pause = 30
 #
 # recon_cache_path = /var/cache/swift

etc/container-reconciler.conf-sample

@@ -29,7 +29,7 @@
 # in the queue.
 # reclaim_age = 604800
 # The cycle time of the daemon
-# interval = 300
+# interval = 30
 # Server errors from requests will be retried by default
 # request_tries = 3
 

etc/container-server.conf-sample

@@ -111,6 +111,8 @@ use = egg:swift#recon
 # reclaim_age = 604800
 #
 # Time in seconds to wait between replication passes
+# Note: if the parameter 'interval' is defined then it will be used in place
+# of run_pause.
 # run_pause = 30
 #
 # recon_cache_path = /var/cache/swift

etc/dispersion.conf-sample

@@ -4,10 +4,15 @@
 auth_url = http://localhost:8080/auth/v1.0
 auth_user = test:tester
 auth_key = testing
+# auth_version = 1.0
+#
+# NOTE: If you want to use keystone (auth version 2.0), then its configuration
+# would look something like:
 # auth_url = http://localhost:5000/v2.0/
 # auth_user = tenant:user
 # auth_key = password
 # auth_version = 2.0
+#
 # endpoint_type = publicURL
 # keystone_api_insecure = no
 #

etc/drive-audit.conf-sample

@@ -11,7 +11,7 @@
 #
 # Location of the log file with globbing
 # pattern to check against device errors.
-# log_file_pattern = /var/log/kern*
+# log_file_pattern = /var/log/kern.*[!.][!g][!z]
 #
 # Regular expression patterns to be used to locate
 # device blocks with errors in the log file. Currently
@@ -19,7 +19,7 @@
 #   \berror\b.*\b(sd[a-z]{1,2}\d?)\b
 #   \b(sd[a-z]{1,2}\d?)\b.*\berror\b
 # One can overwrite the default ones by providing
-# new expressions using the format below: 
+# new expressions using the format below:
 # Format: regex_pattern_X = regex_expression
 # Example:
 #   regex_pattern_1 = \berror\b.*\b(dm-[0-9]{1,2}\d?)\b

etc/object-expirer.conf-sample

@@ -50,6 +50,7 @@
 # up to reclaim_age seconds before it gives up and deletes the entry in the
 # queue.
 # reclaim_age = 604800
+# recon_cache_path = /var/cache/swift
 
 [pipeline:main]
 pipeline = catch_errors cache proxy-server

etc/proxy-server.conf-sample

@@ -70,6 +70,7 @@
 #
 # Use a comma separated list of full url (http://foo.bar:1234,https://foo.bar)
 # cors_allow_origin =
+# strict_cors_mode = True
 #
 # client_timeout = 60
 # eventlet_debug = false
@@ -88,8 +89,8 @@ use = egg:swift#proxy
 # log_handoffs = true
 # recheck_account_existence = 60
 # recheck_container_existence = 60
-# object_chunk_size = 8192
+# object_chunk_size = 65536
-# client_chunk_size = 8192
+# client_chunk_size = 65536
 #
 # How long the proxy server will wait on responses from the a/c/o servers.
 # node_timeout = 10
@@ -204,7 +205,6 @@ use = egg:swift#proxy
 # usually indicates administrative responsibilities.
 # swift_owner_headers = x-container-read, x-container-write, x-container-sync-key, x-container-sync-to, x-account-meta-temp-url-key, x-account-meta-temp-url-key-2, x-account-access-control
 
-
 [filter:tempauth]
 use = egg:swift#tempauth
 # You can override the default log routing for this filter here: