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authorSiri Hansen <[email protected]>2018-04-27 10:13:17 +0200
committerSiri Hansen <[email protected]>2018-04-27 10:13:17 +0200
commit56e88f364a32b471b03e2364c2eb84783642ad88 (patch)
tree1e5250d3b503eb8593635bc1c8a7a6a31a3ad6e4 /lib/sasl/doc/src
parent0aa02c13f0d213da983bc01cab8be737e7aa751a (diff)
parentee44197422710dabe43f2f4b80d1034aae9c916f (diff)
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Merge branch 'siri/kernel/logger/OTP-13295'
* siri/kernel/logger/OTP-13295: Add documentation of the built-in logger handlers Catch badarg in logger:get_format_depth/0 Add chars_limit option to logger_formatter Don't kill logger process until all other processes are dead Set call timeout for logger_server to infinity Update primary bootstrap Test cuddle for logger Update cth_log_redirect to a logger handler Start using logger internally in kernel and stdlib Remove error_logger process and add logger process Add logger
Diffstat (limited to 'lib/sasl/doc/src')
-rw-r--r--lib/sasl/doc/src/sasl_app.xml183
1 files changed, 107 insertions, 76 deletions
diff --git a/lib/sasl/doc/src/sasl_app.xml b/lib/sasl/doc/src/sasl_app.xml
index e0693fcb60..48b0b8eafb 100644
--- a/lib/sasl/doc/src/sasl_app.xml
+++ b/lib/sasl/doc/src/sasl_app.xml
@@ -34,12 +34,9 @@
<p>The SASL application provides the following services:</p>
<list type="bulleted">
<item><c>alarm_handler</c></item>
- <item><c>rb</c></item>
<item><c>release_handler</c></item>
<item><c>systools</c></item>
</list>
- <p>The SASL application also includes <c>error_logger</c> event
- handlers for formatting SASL error and crash reports.</p>
<note>
<p>The SASL application in OTP has nothing to do with
"Simple Authentication and Security Layer" (RFC 4422).</p>
@@ -47,51 +44,109 @@
</description>
<section>
- <title>Error Logger Event Handlers</title>
- <p>The following error logger event handlers are used by
- the SASL application.</p>
+ <title>Configuration</title>
+ <p>The following configuration parameters are defined for the SASL
+ application. For more information about configuration parameters, see
+ <seealso marker="kernel:app"><c>app(4)</c></seealso> in Kernel.</p>
+ <p>All configuration parameters are optional.</p>
+ <taglist>
+ <tag><c><![CDATA[start_prg = string() ]]></c></tag>
+ <item>
+ <p>Specifies the program to be used when restarting the system
+ during release installation. Default is
+ <c>$OTP_ROOT/bin/start</c>.</p>
+ </item>
+ <tag><c><![CDATA[masters = [atom()] ]]></c></tag>
+ <item>
+ <p>Specifies the nodes used by this node to read/write release
+ information. This parameter is ignored if parameter
+ <c>client_directory</c> is not set.</p>
+ </item>
+ <tag><c><![CDATA[client_directory = string() ]]></c></tag>
+ <item>
+ <p>This parameter specifies the client directory at the master
+ nodes. For details, see
+ <seealso marker="doc/design_principles:release_handling">Release Handling</seealso>
+ in <em>OTP Design Principles</em>. This parameter is
+ ignored if parameter <c>masters</c> is not set.</p>
+ </item>
+ <tag><c><![CDATA[static_emulator = true | false ]]></c></tag>
+ <item>
+ <p>Indicates if the Erlang emulator is statically installed. A
+ node with a static emulator cannot switch dynamically to a
+ new emulator, as the executable files are written into memory
+ statically. This parameter is ignored if parameters <c>masters</c>
+ and <c>client_directory</c> are not set.</p>
+ </item>
+ <tag><c><![CDATA[releases_dir = string() ]]></c></tag>
+ <item>
+ <p>Indicates where the <c>releases</c> directory is located.
+ The release handler writes all its files to this directory.
+ If this parameter is not set, the OS environment parameter
+ <c>RELDIR</c> is used. By default, this is
+ <c>$OTP_ROOT/releases</c>.</p>
+ </item>
+ <tag><c><![CDATA[utc_log = true | false ]]></c></tag>
+ <item>
+ <p>If set to <c>true</c>, all dates in textual log outputs are
+ displayed in Universal Coordinated Time with the string
+ <c>UTC</c> appended.</p>
+ </item>
+ </taglist>
+ </section>
+
+ <section>
+ <title>Deprecated Error Logger Event Handlers and Configuration</title>
+ <p>In OTP-21, a new API for logging was added to Erlang/OTP. The
+ old <c>error_logger</c> event manager, and event handlers
+ running on this manager, will still work, but they are not used
+ by default.</p>
+ <p>The error logger event handlers <c>sasl_report_tty_h</c>
+ and <c>sasl_report_file_h</c>, were earliger used for printing
+ the so called SASL reports, i.e. <em>supervisor
+ reports</em>, <em>crash reports</em>, and <em>progress
+ reports</em>. These reports are now also printed by the standard
+ logger handler started by the Kernel application. Progress
+ reports are by default stopped by a filter, but can easily be
+ added by setting the Kernel configuration
+ parameter <seealso marker="kernel:kernel_app#logger_log_progress"><c>logger_log_progress=true</c></seealso>.</p>
+ <p>If the old error logger event handlers are still desired, they
+ must be added by
+ calling <c>error_logger:add_report_handler/1,2</c>.</p>
<taglist>
<tag><c>sasl_report_tty_h</c></tag>
<item>
<p>Formats and writes <em>supervisor reports</em>, <em>crash
reports</em>, and <em>progress reports</em> to <c>stdio</c>.
This error logger event handler uses
- <seealso marker="kernel:kernel_app#error_logger_format_depth">error_logger_format_depth</seealso>
- in the Kernel application to limit how much detail is
- printed in crash and supervisor reports.</p>
+ <seealso marker="kernel:kernel_app#logger_format_depth"><c>logger_format_depth</c></seealso>
+ in the Kernel application to limit how much detail is printed
+ in crash and supervisor reports. If <c>logger_format_depth</c>
+ is not set, it uses the old <c>error_logger_format_depth</c>
+ instead.</p>
</item>
<tag><c>sasl_report_file_h</c></tag>
<item>
<p>Formats and writes <em>supervisor reports</em>, <em>crash
report</em>, and <em>progress report</em> to a single file.
This error logger event handler uses
- <seealso marker="kernel:kernel_app#error_logger_format_depth">error_logger_format_depth</seealso>
- in the Kernel application to limit the details
- printed in crash and supervisor reports.</p>
- </item>
- <tag><c>log_mf_h</c></tag>
- <item>
- <p>This error logger writes <em>all</em> events sent to the
- error logger to disk. Multiple files and log rotation are
- used. For efficiency reasons, each event is written as a
- binary. For more information about this handler,
- see <seealso marker="stdlib:log_mf_h">the STDLIB Reference
- Manual</seealso>.</p>
- <p>To activate this event handler, three SASL
- configuration parameters must be set,
- <c>error_logger_mf_dir</c>, <c>error_logger_mf_maxbytes</c>,
- and <c>error_logger_mf_maxfiles</c>. The next section provides
- more information about the configuration parameters.</p>
+ <seealso marker="kernel:kernel_app#logger_format_depth"><c>logger_format_depth</c></seealso>
+ in the Kernel application to limit the details printed in
+ crash and supervisor reports. If <c>logger_format_depth</c> is
+ not set, it uses the old <c>error_logger_format_depth</c>
+ instead.</p>
</item>
</taglist>
- </section>
-
- <section>
- <title>Configuration</title>
- <p>The following configuration parameters are defined for the SASL
- application. For more information about configuration parameters, see
- <seealso marker="kernel:app"><c>app(4)</c></seealso> in Kernel.</p>
- <p>All configuration parameters are optional.</p>
+ <p>A similar behaviour, but still using the new logger API, can be
+ obtained by setting the Kernel application environment
+ variable <seealso marker="kernel:kernel_app#logger_sasl_compatible"><c>logger_sasl_compatible=true</c></seealso>. This will add a
+ second instance of the standard logger handler
+ named <c>sasl_h</c>, which will only print the SASL reports. No
+ SASL reports will then be printed by the Kernel logger
+ handler.</p>
+ <p>The <c>sasl_h</c> handler will be configured according to the
+ values of the following SASL application environment
+ variables.</p>
<taglist>
<tag><c><![CDATA[sasl_error_logger = Value ]]></c></tag>
<item>
@@ -124,6 +179,19 @@
<c>sasl_error_logger</c> to error reports or progress reports,
or both. Default is <c>all</c>.</p>
</item>
+ </taglist>
+
+ <p>The error logger event handler <c>log_mf_h</c> can also still
+ be used. This event handler writes <em>all</em> events sent to
+ the error logger to disk. Multiple files and log rotation are
+ used. For efficiency reasons, each event is written as a
+ binary. For more information about this handler,
+ see <seealso marker="stdlib:log_mf_h">the STDLIB Reference
+ Manual</seealso>.</p>
+ <p>To activate this event handler, three SASL configuration
+ parameters must be
+ set:</p>
+ <taglist>
<tag><c><![CDATA[error_logger_mf_dir = string() | false ]]></c></tag>
<item>
<p>Specifies in which directory <c>log_mf_h</c> is to store
@@ -142,49 +210,12 @@
this parameter is undefined, the <c>log_mf_h</c> handler is
not installed.</p>
</item>
- <tag><c><![CDATA[start_prg = string() ]]></c></tag>
- <item>
- <p>Specifies the program to be used when restarting the system
- during release installation. Default is
- <c>$OTP_ROOT/bin/start</c>.</p>
- </item>
- <tag><c><![CDATA[masters = [atom()] ]]></c></tag>
- <item>
- <p>Specifies the nodes used by this node to read/write release
- information. This parameter is ignored if parameter
- <c>client_directory</c> is not set.</p>
- </item>
- <tag><c><![CDATA[client_directory = string() ]]></c></tag>
- <item>
- <p>This parameter specifies the client directory at the master
- nodes. For details, see
- <seealso marker="doc/design_principles:release_handling">Release Handling</seealso>
- in <em>OTP Design Principles</em>. This parameter is
- ignored if parameter <c>masters</c> is not set.</p>
- </item>
- <tag><c><![CDATA[static_emulator = true | false ]]></c></tag>
- <item>
- <p>Indicates if the Erlang emulator is statically installed. A
- node with a static emulator cannot switch dynamically to a
- new emulator, as the executable files are written into memory
- statically. This parameter is ignored if parameters <c>masters</c>
- and <c>client_directory</c> are not set.</p>
- </item>
- <tag><c><![CDATA[releases_dir = string() ]]></c></tag>
- <item>
- <p>Indicates where the <c>releases</c> directory is located.
- The release handler writes all its files to this directory.
- If this parameter is not set, the OS environment parameter
- <c>RELDIR</c> is used. By default, this is
- <c>$OTP_ROOT/releases</c>.</p>
- </item>
- <tag><c><![CDATA[utc_log = true | false ]]></c></tag>
- <item>
- <p>If set to <c>true</c>, all dates in textual log outputs are
- displayed in Universal Coordinated Time with the string
- <c>UTC</c> appended.</p>
- </item>
</taglist>
+ <p>The new <seealso marker="kernel:logger_disk_log_h">
+ <c>logger_disk_log_h</c></seealso> might be an alternative
+ to <c>log_mf_h</c> if log rotation is desired. This does,
+ however, write the log events in clear text and not as binaries.</p>
+
</section>
<section>