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plone.recipe.zope2instance

README.rst

Introduction

This recipe creates and configures a Zope 2 instance in parts. It also installs a control script, which is like zopectl, in the bin/ directory. The name of the control script is the the name of the part in buildout. By default various runtime and log information will be stored inside the var/ directory.

Note: This recipe is not intended to setup a Zope 2 WSGI based instance and will not work for this use-case. There's no special recipe required to setup WSGI any longer and you can use simple template recipes instead.

You can use it with a part like this:

[instance]
recipe = plone.recipe.zope2instance
user = admin:admin
http-address = 8080
eggs = my.distribution
zcml = my.distribution

Attention!

This release is targeted at Zope 2.12+ and Python 2.6. If you are using this recipe with earlier versions of Zope or Python, you should use one of the releases from the 3.x series.

Options

Common options

eggs
The list of distributions you want to make available to the instance.
zcml
Install ZCML slugs for the distributions listed, separated by whitespace. You can specify the type of slug by appending '-' and the type of slug you want to create. Some examples: my.distribution my.distribution-meta.
http-address
Give a port for the HTTP server. Defaults to 8080. Set to an empty string to disable the HTTP server. You may want to do this when running Zope under an external server such as a WSGI deployment.
ip-address
The default IP address on which Zope's various server protocol implementations will listen for requests. If this is unset, Zope will listen on all IP addresses supported by the machine. This directive can be overridden on a per-server basis in the servers section. Defaults to not setting an ip-address.
zodb-cache-size
Set the ZODB cache size, i.e. the number of objects which the ZODB cache will try to hold. Defaults to 30000.
zserver-threads
Specify the number of threads that Zope's ZServer web server will use to service requests. The recipes default is 2.
environment-vars

Define arbitrary key-value pairs for use as environment variables during Zope's run cycle. Example:

environment-vars =
  TZ US/Eastern
  zope_i18n_allowed_languages en
  zope_i18n_compile_mo_files true
initialization
Specify some Python initialization code to include within the generated sitecustomize.py script (Buildout >= 1.5) or within the instance script (Buildout < 1.5). This is very limited. In particular, be aware that leading whitespace is stripped from the code given. added in version 4.2.14

Theme resources

Please refer to http://pypi.python.org/pypi/plone.resource for more details and setup instructions.

resources

Specify a central resource directory. Example:

resources = ${buildout:directory}/resources

Locales

locales

Specify a locales directory. Example:

locales = ${buildout:directory}/locales

This registers a locales directory with extra or different translations. If you want to override a few translations from the plone domain in the English language, you can add a en/LC_MESSAGES/plone.po file in this directory, with standard headers at the top, followed by something like this:

#. Default: "You are here:"
msgid "you_are_here"
msgstr "You are very welcome here:"

Translations for other message ids are not affected and will continue to work.

Development options

verbose-security
Set to on to turn on verbose security (and switch to the Python security implementation). Defaults to off (and the C security implementation).

Direct storage

If you have only one application process, it can open the database files directly without running a database server process.

file-storage
The filename where the ZODB data file will be stored. Defaults to ${buildout:directory}/var/filestorage/Data.fs.
blob-storage
The name of the directory where the ZODB blob data will be stored, defaults to ${buildout:directory}/var/blobstorage.

Basic ZEO storage

If you want multiple application processes you need to run a separate database server process and connect to it, either via ZEO or RelStorage.

zeo-address
Set the address of the ZEO server. Defaults to 8100.
zeo-client
Set to 'on' to make this instance a ZEO client. In this case, setting the zeo-address option is required, and the file-storage option has no effect. To set up a ZEO server, you can use the plone.recipe.zeoserver recipe. Defaults to 'off'.
blob-storage
The location of the blob zeocache, defaults to var/blobcache. If shared-blob is on it defaults to ${buildout:directory}/var/blobstorage.
shared-blob
Defaults to off. Set this to on if the ZEO server and the instance have access to the same directory. Either by being on the same physical machine or by virtue of a network file system like NFS. Make sure this instances blob-storage is set to the same directory used for the ZEO servers blob-storage. In this case the instance will not stream the blob file through the ZEO connection, but just send the information of the file location to the ZEO server, resulting in faster execution and less memory overhead.
read-only
Set zeo client as read only added in version 4.2.12

ZEO authentication

You need to activate ZEO auth on the server side as well, for this to work. Without this anyone that can connect to the database servers socket can read and write arbitrary data.

zeo-username
Enable ZEO authentication and use the given username when accessing the ZEO server. It is obligatory to also specify a zeo-password.
zeo-password
Password to use when connecting to a ZEO server with authentication enabled.
zeo-realm
Authentication realm to use when authentication with a ZEO server. Defaults to 'ZEO'.

RelStorage

Please refer to http://pypi.python.org/pypi/RelStorage for more details and setup instructions.

rel-storage

Allows to set a RelStorage instead of a FileStorage.

Contains settings separated by newlines, with these values:

  • type: any database type supported (postgresql, oracle, mysql)
  • RelStorage specific keys, like cache-servers and poll-interval
  • all other keys are passed on to the database-specific RelStorage adapter.

Example:

rel-storage =
  type oracle
  dsn (DESCRIPTION=(ADDRESS=(HOST=s01))(CONNECT_DATA=(SERVICE_NAME=d01)))
  user tarek
  password secret

Logging

In most cases you don't need to adjust any of this, you might want to adjust log levels or configure mailinglogger.

event-log
The filename of the event log. Defaults to ${buildout:directory}/var/log/${partname}.log
event-log-level
Set the level of the console output for the event log. Level may be any of CRITICAL, ERROR, WARN, INFO, DEBUG, or ALL. Defaults to INFO.
event-log-max-size
Maximum size of event log file. Enables log rotation.
event-log-old-files
Number of previous log files to retain when log rotation is enabled. Defaults to 1.
event-log-custom
A custom section for the eventlog, to be able to use another event logger than logfile
mailinglogger

A mailinglogger section added into the event log. Example snippet:

<mailing-logger>
  level error
  flood-level 10
  smtp-server smtp.mydomain.com
  from logger@mydomain.com
  to errors@mydomain.com
  subject [My domain error] [%(hostname)s] %(line)s
</mailing-logger>
z2-log
The filename for the Z2 access log. Defaults to var/log/${partname}-Z2.log.
z2-log-level
Set the log level for the access log. Level may be any of CRITICAL, ERROR, WARN, INFO, DEBUG, or ALL. Defaults to WARN.
access-log-max-size
Maximum size of access log file. Enables log rotation.
access-log-old-files
Number of previous log files to retain when log rotation is enabled. Defaults to 1.
access-log-custom
Like event-log-custom, a custom section for the access logger, to be able to use another event logger than logfile.

Load non-setuptools compatible Python libraries

products
A list of paths where Zope 2 products are installed. The first path takes precedence in case the same product is found in more than one directory. Zope 2 products are deprecated and won't work any longer in a future version of Zope/Plone.
extra-paths
A list of paths where additional Python packages are installed. The paths are searched in the given order after all egg and products paths.

Advanced ZCML options

site-zcml
If you want a custom site.zcml file, put its content here. If this option is used the zcml and zcml-additional options are ignored.
zcml-additional
Extra ZCML statements that should be included in the generated site.zcml file.

Advanced ZEO options

zeo-client-cache-size
Set the size of the ZEO client cache. Defaults to '30MB'. The ZEO cache is a disk based cache shared between application threads. It's stored inside the directory designated by the TMP environment variable.
zeo-client-client
Set the persistent cache name that is used to construct the cache filenames. This enabled the ZEO cache to be persisted. Persistent cache files are disabled by default.
zeo-client-blob-cache-size
Set the maximum size of the ZEO blob cache, in bytes. If not set, then the cache size isn't checked and the blob directory will grow without bound.
zeo-client-blob-cache-size-check
Set the ZEO check size as percent of zeo-client-blob-cache-size (for example, 10 for 10%). The ZEO cache size will be checked when this many bytes have been loaded into the cache. Defaults to 10% of the blob cache size. This option is ignored if shared-blob is enabled.
zeo-client-drop-cache-rather-verify
Indicates that the cache should be dropped rather than verified when the verification optimization is not available (e.g. when the ZEO server restarted). Defaults to 'False'.
zeo-storage
Set the storage number of the ZEO storage. Defaults to '1'.
zeo-var
Used in the ZEO storage snippets to configure the ZEO var folder. Defaults to $INSTANCE_HOME/var.

Advanced options

before-storage

Wraps the base storage in a "before storage" which sets it in read-only mode from the time given (or "now" for the current time).

This option is normally used together with demo-storage for a normally running site in order for changes to be made to the database.

client-home
Sets the clienthome for the generated instance. Defaults to ${buildout:directory}/var/<name of the section>.
default-zpublisher-encoding
This controls what character set is used to encode unicode data that reaches ZPublisher without any other specified encoding. This defaults to 'utf-8'. Plone requires this to be set to utf-8.
demo-storage

If 'on' it enables the demo storage. By default, this is a memory-based storage option; changes are not persisted (see the demo-file-storage option to use a persistent storage for changes made during the demonstration).

To use with a base storage option configured with a blob-storage, you must set a demo-blob-storage.

demo-file-storage
If provided, the filename where the ZODB data file for changes committed during a demonstration will be stored.
demo-blob-storage

If provided, the name of the directory where demonstration ZODB blob data will be stored.

This storage may be connected to a demonstration file storage, or used with the default memory-based demo storage (in this case you might want to use a temporary directory).

effective-user
The name of the effective user for the Zope process. Defaults to not setting an effective user.
enable-product-installation
Enable the persistent product registry by setting this to on. By default the registry is turned off. Enabling the registry is deprecated.
ftp-address
Give a port for the FTP server. This enables the FTP server.
http-force-connection-close
Set to on to enforce Zope to set Connection: close header. This is useful if for example a 304 leaves the connection open with Varnish in front and Varnish tries to reuse the connection.
http-fast-listen
Set to off to defer opening of the HTTP socket until the end of the Zope startup phase. Defaults to on.
icp-address
Give a port for the ICP server. This enables the ICP server.
import-directory
Used to configure the import directory for instance. Defaults to <client-home>/import.
port-base
Offset applied to the port numbers used for ZServer configurations. For example, if the http-server port is 8080 and the port-base is 1000, the HTTP server will listen on port 9080. This makes it easy to change the complete set of ports used by a Zope server process. Zope defaults to 0.
python-check-interval
An integer telling the Python interpreter to check for asynchronous events every number of instructions. This affects how often thread switches occur. Defaults to 1000.
relative-paths
Set this to true to make the generated scripts use relative paths. You can also enable this in the [buildout] section.
scripts

Add this parameter with no arguments to suppress script generation. Otherwise (i.e. without this parameter), scripts for packages added to the eggs parameter will be generated. You may also configure per package. E.g.:

[instance]
recipe = plone.recipe.zope2instance
eggs =
  Plone
  mr.migrator
  zopeskel
scripts = zopeskel

In the above example, only zopeskel's scripts will be generated.

var
Used to configure the base directory for all things going into var. Defaults to ${buildout:directory}/var.
webdav-address
Give a port for the WebDAV server. This enables the WebDAV server
webdav-force-connection-close
Valid options are off and on. Defaults to off
zlib-storage

Adds support for file compression on a file storage database. The option accepts the values 'active' (compress new records) or 'passive' (do not compress new records). Both options support already compressed records.

You can use the 'passive' setting while you prepare a number of connected clients for compressed records.

zodb-cache-size-bytes
Set the ZODB cache sizes in bytes. This feature is still experimental.
zodb-temporary-storage
If given Zope's default temporary storage definition will be replaced by the lines of this parameter.
zope-conf
A relative or absolute path to a zope.conf file. If this is given, many of the options in the recipe will be ignored.
zope-conf-additional

Give additional lines to zope.conf. Make sure you indent any lines after the one with the parameter.

Example:

zope-conf-additional =
  locale fr_FR
  http-realm Slipknot
zopectl-umask

Manually set the umask for the zopectl process.

Example:

zopectl-umask = 002
http-header-max-length

Manually set the maximum size of received HTTP header being processed by Zope. The request is discarded and considered as a DoS attack if the header size exceeds this limit. Default: 8192

Example:

http-header-max-length = 16384

Additional Control Script debug and run Commands

The extended Zope 2 control script installed by this recipe, usually bininstance by convention, offers a debug command and another run command. The debug command starts an interactive Python prompt with the Zope 2 application available via the app name. Similarly, the run command accepts a Python script as an argument that will be run under the same conditions.

These commands have also been extended to set up a more complete environment. Specifically, these commands set up a REQUEST, log in the AccessControl.SpecialUsers.system user, and may traverse to an object, such as a CMF portal. This environment set up is controlled with following options:

-R/--no-request -- do not set up a REQUEST.
-L/--no-login -- do not login the system user.
-O/--object-path <path> -- Traverse to <path> from the app
                           and make available as `obj`.

Note that these options must come before the script name, e.g. bin/instance -RLOPlone/front-page debug

Additional control script commands

Third-party distributions may add additional commands to the control script by installing a 'plone.recipe.zope2instance.ctl' entry point. For example, an egg called MyDist could include a module called mymodule with the following custom command:

def foo(self, *args)
    """Help message here"""
    print 'foo'

It would then install the foo method as a command for the control script using the following entry point configuration in setup.py:

entry_points="""
[plone.recipe.zope2instance.ctl]
foo = mymodule:foo
"""

This would allow invoking the foo method by running bin/instance foo (assuming the instance control script was installed by a buildout part called instance.) The entry point is invoked with the following parameters:

self
An instance of plone.recipe.zope2instance.ctl.AdjustedZopeCmd.
args
Any additional arguments that were passed on the command line.

Reporting bugs or asking questions

We have a shared bugtracker and help desk on Launchpad: https://bugs.launchpad.net/collective.buildout/

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