Splunk® Enterprise

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app.conf

The following are the spec and example files for app.conf.

app.conf.spec

   Version 8.0.0

 This file maintains the state of a given app in the Splunk platform. It can
 also be used to customize certain aspects of an app.

 An app.conf file can exist within each app on the Splunk platform.

 You must restart the Splunk platform to reload manual changes to app.conf.

 To learn more about configuration files (including precedence) please see the
 documentation located at
 http://docs.splunk.com/Documentation/Splunk/latest/Admin/Aboutconfigurationfiles


 Settings for how an app appears in the Launcher in the Splunk platform and
 online on Splunkbase.

[author=<name>]

email = <email-address>
company = <company-name>

[id]

group = <group-name>
name = <app-name>
version = <version-number>

[launcher]

 global setting

remote_tab = <boolean>
* Set whether the Launcher interface connects to apps.splunk.com (Splunkbase).
* This setting only applies to the Launcher app. Do not set it in any
  other app.
* Default: true

 per-application settings

version = <string>
* Version numbers are a number followed by a sequence of dots and numbers.
* The best practice for version numbers for releases is to use three digits
  formatted as Major.Minor.Revision.
* Pre-release versions can append a single-word suffix like "beta" or "preview".
* Use lower case and no spaces when designating a pre-release version.
* Example versions:
  * 1.2.0
  * 3.2.1
  * 11.0.34
  * 2.0beta
  * 1.3beta2
  * 1.0preview

description = <string>
* Short explanatory string that displays below the title of the app in Launcher.
* Descriptions that are 200 characters or less are a best practice because most
  users won't read long descriptions.

author = <string>
* For apps you intend to upload to Splunkbase, list the username of your
  splunk.com account.
* For apps that are only for internal use, include your full name and/or contact
  info (for example, email address).

 Your app can include an icon which appears next to your app in Launcher
 and on Splunkbase. You can also include a screenshot, which shows up on
 Splunkbase when the user views information about your app before downloading it.
 If you include an icon file, the file name must end with "Icon" before the
 file extension and the "I" must be capitalized. For example, "mynewIcon.png".
 Screenshots are optional to include.

 There is no setting in app.conf for screenshot or icon images.
 Splunk Web places files you upload with your app into
 the <app_directory>/appserver/static directory.
 These images do not appear in your app.

 Move or place icon images in the <app_directory>/static directory.
 Move or place screenshot images in the <app_directory>/default/static directory.
 Launcher and Splunkbase automatically detect the images in those locations.

 For example:

     <app_directory>/static/appIcon.png    (the capital "I" is required!)
     <app_directory>/default/static/screenshot.png

 An icon image must be a 36px by 36px PNG file.
 An app screenshot must be 623px by 350px PNG file.


 [package] defines upgrade-related metadata, and will be
 used in future versions of Splunk Enterprise to streamline app upgrades.

[package]

id = <string>
* Omit this setting for apps that are for internal use only and are not intended
  to be uploaded to Splunkbase.
* id is required for all new apps uploaded to Splunkbase. Future versions of
  Splunk Enterprise will use appid to correlate locally-installed apps and the
  same app on Splunkbase (e.g. to notify users about app updates).
* id must be the same as the folder name in which your app lives in
  $SPLUNK_HOME/etc/apps.
* id must adhere to cross-platform folder name restrictions:
  * must contain only letters, numbers, "." (dot), and "_" (underscore)
    characters.
  * must not end with a dot character.
  * must not be any of the following names: CON, PRN, AUX, NUL,
      COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9,
      LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9

check_for_updates = <boolean>
* Determines whether Splunk Enterprise checks Splunkbase for updates to this
  app.
* Default: true

show_upgrade_notification = <boolean>
* Determines whether Splunk Enterprise shows an upgrade notification in Splunk
  Web for this app.
* Default: false


 Set install settings for this app

[install]

state = disabled | enabled
* Set whether app is disabled or enabled in the Splunk platform.
* If an app is disabled, its configurations are ignored.
* Default: enabled

state_change_requires_restart = <boolean>
* Set whether changing an app's state ALWAYS requires a restart of Splunk Enterprise.
* State changes include enabling or disabling an app.
* When set to true, changing an app's state always requires a restart.
* When set to false, modifying an app's state might or might not require a restart
  depending on what the app contains. This setting cannot be used to avoid all
  restart requirements.
* Default: false

is_configured = <boolean>
* Stores indication of whether the application's custom setup has been performed
* Default: false

build = <integer>
* Required.
* Must be a positive integer.
* Increment this whenever you change files in appserver/static.
* Every release must change both "version" and "build" settings.
* Ensures browsers don't use cached copies of old static files
  in new versions of your app.
* Build is a single integer, unlike version which can be a complex string
  like 1.5.18.

allows_disable = <boolean>
* Set whether an app allows itself to be disabled.
* Default: true

install_source_checksum = <string>
* Records a checksum of the tarball from which a given app was installed.
* Splunk Enterprise automatically populates this value upon install.
* Do not set this value explicitly within your app!

install_source_local_checksum = <string>
* Records a checksum of the tarball from which a given app's local configuration
* was installed. Splunk Enterprise automatically populates this value upon
* install. Do not set this value explicitly within your app!

python.version = {default|python|python2|python3}
* When 'installit.py' exists, selects which Python version to use.
* Set to either "default" or "python" to use the system-wide default Python
  version.
* Optional.
* Default: Not set; uses the system-wide Python version.


 Handle reloading of custom .conf files included in the app (4.2+ versions only)
 Include this stanza if your app includes custom configuration files.

[triggers]

reload.<conf_file_name> = [ simple | rest_endpoints | access_endpoints <handler_url> | http_get <handler_url> | http_post <handler_url> ]
* Splunk Enterprise reloads app configuration after every app-state change:
  install, update, enable, and disable.
* If your app doesn't use a custom config file (e.g. myconffile.conf)
  then it won't need a [triggers] stanza, because
  $SPLUNK_HOME/etc/system/default/app.conf already includes a [triggers]
  stanza which automatically reloads config files normally used by Splunk Enterprise.
* If your app uses a custom config file (e.g. myconffile.conf) and you want to
  avoid unnecessary Splunk Enterprise restarts, you'll need to add a reload value in
  the [triggers] stanza.
* If you don't include [triggers] settings and your app uses a custom
  config file, a Splunk Enterprise restart will be required after every state change.
* Specifying "simple" implies that Splunk Enterprise will take no special action to
  reload your custom conf file.
* Specify "access_endpoints" and a URL to a REST endpoint, and Splunk Enterprise will
  call its _reload() method at every app state change.
* Specify "http_get" and a URL to a REST endpoint, and Splunk Enterprise will simulate
  an HTTP GET request against this URL at every app state change.
* Specify "http_post" and a URL to a REST endpoint, and Splunk Enterprise will simulate
  an HTTP POST request against this URL at every app state change.
* "rest_endpoints" is reserved for Splunk Enterprise internal use for reloading
  restmap.conf.

* Examples:

       [triggers]
        Do not force a restart of Splunk Enterprise for state changes of MyApp
 		 Do not run special code to tell MyApp to reload myconffile.conf
        Apps with custom config files usually pick this option:
       reload.myconffile = simple

 		 Do not force a restart of Splunk Enterprise for state changes of MyApp.
 		 Splunk Enterprise calls the /admin/myendpoint/_reload method in my custom
 		 EAI handler.
 		 Use this advanced option only if MyApp requires custom code to reload
 		 its configuration when its state changes
       reload.myotherconffile = access_endpoints /admin/myendpoint

[shclustering]

deployer_lookups_push_mode = preserve_lookups | always_preserve | always_overwrite
* Determines the deployer_lookups_push_mode for the 'splunk apply
  shcluster-bundle' command.
* If set to "preserve_lookups", the 'splunk apply shcluster-bundle' command
  honors the '-preserve-lookups' option as it appears on the command line. If
  '-preserve-lookups' is flagged as "true", then lookup tables for this app are
  preserved. Otherwise, lookup tables are overwritten.
* If set to "always_preserve", the 'splunk apply shcluster-bundle' command ignores
  the '-preserve-lookups' option as it appears on the command line and lookup
  tables for this app are always preserved.
* If set to "always_overwrite", the 'splunk apply shcluster-bundle' command
  ignores the '-preserve-lookups' option as it appears on the command line and
  lookup tables for this app are always overwritten.
* Default: preserve_lookups

deployer_push_mode = full | merge_to_default | local_only | default_only
* How the deployer pushes the configuration bundle to search head cluster members.
* If set to "full": Bundles all of the app's contents located in default/,
  local/, users/<app>/, and other app subdirs. It then pushes the bundle to
  the members. When applying the bundle on a member, the non-local and
  non-user configurations from the deployer's app folder are copied to the
  member's app folder, overwriting existing contents. Local and user
  configurations are merged with the corresponding folders on the member,
  such that member configuration takes precedence.  This option should not
  be used for built-in apps, as overwriting the member's built-in apps can
  result in adverse behavior.
* If set to "merge_to_default": Merges the local and default folders into
  the default folder and pushes the merged app to the members. When
  applying the bundle on a member, the default configuration on the member
  is overwritten. User configurations are copied and merged with the user
  folder on the member, such that the existing configuration on the member
  takes precedence. In versions 7.2 and prior, this was the only behavior.
* If set to "local_only": This option bundles the app's local directory (and its
  metadata) and pushes it to the cluster. When applying the bundle to a
  member, the local configuration from the deployer is merged with the
  local configuration on the member, such that the member's existing
  configuration takes precedence. Use this option to push the local
  configuration of built-in apps, such as search. If used to push an app
  that relies on non-local content (such as default/ or bin/), these
  contents must already exist on the member.
* If set to "default_only": Bundles all of the configuration files except
  for local and users/<app>/.  When applying the bundle on a member, the
  contents in the member's default folder are overwritten.
* Default:  "merge_to_default", for all apps except built-in apps, which
  defaults to "local_only".


 Set UI-specific settings for this app

[ui]

is_visible = <boolean>
* Indicates if this app is visible/navigable as an app in Splunk Web.
* Apps require at least 1 view to be available in Splunk Web.

show_in_nav = <boolean>
* Sets whether this app appears in the global app dropdown.

is_manageable = <boolean>
* Support for this setting has been removed. It no longer has any effect.

label = <string>
* Defines the name of the app shown in Splunk Web and Launcher.
* Recommended length between 5 and 80 characters.
* Must not include "Splunk For" prefix.
* Label is required.
* Examples of good labels:
    IMAP Monitor
    SQL Server Integration Services
    FISMA Compliance

docs_section_override = <string>
* Defines override for auto-generated app-specific documentation links.
* If not specified, app-specific documentation link includes [<app-name>:<app-version>]
* If specified, app-specific documentation link includes [<docs_section_override>]
* This setting only applies to apps with documentation on the Splunk documentation site.

attribution_link = <string>
* URL that users can visit to find third-party software credits and attributions
  for assets the app uses.
* External links must start with http:// or https://.
* Values that do not start with http:// or https:// get interpreted as Quickdraw
  location strings and translated to internal documentation references.

setup_view = <string>
* Optional setting.
* Defines custom setup view found within the /data/ui/views REST endpoint.
* If not specified, defaults to setup.xml


 Credential-verification scripting (4.2+ versions only)
 Credential entries are superseded by passwords.conf from 6.3 onwards.
 While the entries here are still honored post-6.3, updates to these occur in
 passwords.conf, which overrides any values present here.

[credentials_settings]

verify_script = <string>
* Optional setting.
* Command line to invoke to verify credentials used for this app.
* For scripts, the command line must include both the interpreter and the
  script for it to run.
    * Example: "$SPLUNK_HOME/bin/python" "$SPLUNK_HOME/etc/apps/<myapp>/bin/$MY_SCRIPT"
* The invoked program is communicated with over standard in / standard out via
  the same protocol as splunk scripted auth.
* Paths incorporating variable expansion or explicit spaces must be quoted.
  * For example, a path including $SPLUNK_HOME should be quoted, as likely
    will expand to C:\Program Files\Splunk

python.version = {default|python|python2|python3}
* This property is used only when verify_script begins with the canonical path
  to the Python interpreter, in other words, $SPLUNK_HOME/bin/python.  If any
  other path is used, this property is ignored.
* For Python scripts only, selects which Python version to use.
* Set to either "default" or "python" to use the system-wide default Python
  version.
* Optional.
* Default: Not set; uses the system-wide Python version.

[credential:<realm>:<username>]

password = <string>
* Password that corresponds to the given username for the given realm.
* Realm is optional.
* The password can be in clear text, but when saved from splunkd the
  password is always encrypted.

 diag app extensions, 6.4+ only

[diag]

extension_script = <filename>
* Setting this variable declares that this app puts additional information
  into the troubleshooting & support oriented output of the 'splunk diag'
  command.
* Must be a python script.
* Must be a simple filename, with no directory separators.
* The script must exist in the 'bin' subdirectory in the app.
* Full discussion of the interface is located on the Splunk developer portal.
  See http://dev.splunk.com/view/SP-CAAAE8H
* Default: not set (no app-specific data collection will occur).

data_limit = <positive integer>[b|kb|MB|GB]
* Defines a soft ceiling for the amount of uncompressed data that can be
  added to the diag by the app extension.
* Large diags damage the main functionality of the tool by creating data blobs
  too large to copy around or upload.
* Use this setting to ensure that your extension script does not accidentally
  produce far too much data.
* After data produced by this app extension reaches the limit, diag does not add
  any further files on behalf of the extension.
* After diag has finished adding a file which goes over this limit, all further files
  are not be added.
* Must be a positive number followed by a size suffix.
  * Valid suffixes: b: bytes, kb: kilobytes, mb: megabytes, gb: gigabytes
  * Suffixes are case insensitive.
* Default: 100MB

 Other diag settings

default_gather_lookups = <filename> [, <filename> ...]
* Set this variable to declare that the app contains lookups that diag must
  always gather by default.
* Essentially, if there are lookups which are useful for troubleshooting an
  app, and will never contain sensitive (user) data, add the lookups to this
  list so that they appear in generated diags for use when troubleshooting
  the app from customer diags.
* Any files in lookup directories that are not listed here are not gathered by
  default. You can override this behavior with the diag flag --include-lookups.
* This setting is new in Splunk Enterprise/Light version 6.5. Older versions
  gather all lookups by default.
* This does not override the size-ceiling on files in etc. Large lookups are
  still excluded unless the etc-filesize-limit is raised or disabled.
* This only controls files in the same app directory as this conf file.  For
  example, if you have an app directory in etc/slave-apps (index clustering),
  this setting must appear in etc/slave-apps/appname/default/app.conf or
  local/app.conf
* Additional lists can be created with default_gather_lookups-classname = ...
* Default: not set

app.conf.example

#   Version 8.0.0
#
# The following are example app.conf configurations. Configure properties for
# your custom application.
#
# There is NO DEFAULT app.conf.
#
# To use one or more of these configurations, copy the configuration block into
# app.conf in $SPLUNK_HOME/etc/system/local/. You must restart Splunk to
# enable configurations.
#
# To learn more about configuration files (including precedence) please see the
# documentation located at
# http://docs.splunk.com/Documentation/Splunk/latest/Admin/Aboutconfigurationfiles

[launcher]
author=<author of app>
description=<textual description of app>
version=<version of app>


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This documentation applies to the following versions of Splunk® Enterprise: 8.0.0


Comments

Thank you for the helpful comments and observations, Sideview. I'll file a request to investigate and to update the spec file for greater clarity.

Andrewb splunk, Splunker
September 8, 2019

Hello! I've been trying to increase my understanding as an app developer, looking at the 8.0 beta and the historical behavior of splunk as regards "show_in_nav" and "is_visible"

1) It seems clear that the spec file should have more detail. Right now they just say:

is_visible "Indicates if this app is visible/navigable as an app in Splunk Web."
show_in_nav " Sets whether this app appears in the global app dropdown."
which... is confusing cause they're so similar.

I believe that show_in_nav really means "should it appear in the app pulldown *in the admin section*".
And "is_visible" really means "should it appear in the main pulldown

2) Run this search in any splunk instance and it's interesting because there's some surprising variation in how Splunk ships its own out-of-the-box apps.

| rest /services/apps/local
| search disabled=0
| eval type="is_visible="+visible+" show_in_nav="+show_in_nav
| stats values(title) as apps by type

Sideview
September 5, 2019

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