Skip to content

L
libvirt

openeuler / libvirt

通知 3
Star 0
Fork 0
L
libvirt

前往新版Gitcode，体验更适合开发者的 AI 搜索 >>

提交 e03a9027 编写于 作者: D Daniel Veillard
浏览文件
操作

* docs/logging.html docs/logging.html.in: new page documenting 

  the logging system
* docs/auth.html docs/deployment.html docs/remote.html
  docs/sitemap.html docs/sitemap.html.in docs/uri.html
  docs/windows.html: integration in the existing set
Daniel
上级 8b5ab9fc
隐藏空白更改
内联 并排
Showing with 340 addition and 0 deletion
ChangeLog
浏览文件 @ e03a9027
Tue Dec 23 14:44:41 CET 2008 Daniel Veillard <veillard@redhat.com>
* docs/logging.html docs/logging.html.in: new page documenting
the logging system
* docs/auth.html docs/deployment.html docs/remote.html
docs/sitemap.html docs/sitemap.html.in docs/uri.html
docs/windows.html: integration in the existing set
Tue Dec 23 14:38:30 CET 2008 Guido Günther <agx@sigxcpu.org>
* .x-sc_prohibit_asprintf: new file
......
docs/auth.html
浏览文件 @ e03a9027
......@@ -58,6 +58,10 @@
<div>
<a title="Access the libvirt daemon from a native Windows client" class="inactive" href="windows.html">Windows port</a>
</div>
</li><li>
<div>
<a title="The library and the daemon logging support" class="inactive" href="logging.html">Logging</a>
</div>
</li></ul>
</div>
</li><li>
......
docs/deployment.html
浏览文件 @ e03a9027
......@@ -58,6 +58,10 @@
<div>
<a title="Access the libvirt daemon from a native Windows client" class="inactive" href="windows.html">Windows port</a>
</div>
</li><li>
<div>
<a title="The library and the daemon logging support" class="inactive" href="logging.html">Logging</a>
</div>
</li></ul>
</div>
</li><li>
......
docs/logging.html 0 → 100644
浏览文件 @ e03a9027
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<!--
This file is autogenerated from logging.html.in
Do not edit this file. Changes will be lost.
-->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<link rel="stylesheet" type="text/css" href="main.css" />
<link rel="SHORTCUT ICON" href="32favicon.png" />
<title>libvirt: Logging in the library and the daemon</title>
<meta name="description" content="libvirt, virtualization, virtualization API" />
</head>
<body>
<div id="header">
<div id="headerLogo"></div>
<div id="headerSearch">
<form action="search.php" enctype="application/x-www-form-urlencoded" method="get"><div>
<input id="query" name="query" type="text" size="12" value="" />
<input id="submit" name="submit" type="submit" value="Search" />
</div></form>
</div>
</div>
<div id="body">
<div id="menu">
<ul class="l0"><li>
<div>
<a title="Front page of the libvirt website" class="inactive" href="index.html">Home</a>
</div>
</li><li>
<div>
<a title="Details of new features and bugs fixed in each release" class="inactive" href="news.html">News</a>
</div>
</li><li>
<div>
<a title="Get the latest source releases, binary builds and get access to the source repository" class="inactive" href="downloads.html">Downloads</a>
</div>
</li><li>
<div>
<a title="Information for users, administrators and developers" class="active" href="docs.html">Documentation</a>
<ul class="l1"><li>
<div>
<a title="Information about deploying and using libvirt" class="active" href="deployment.html">Deployment</a>
<ul class="l2"><li>
<div>
<a title="The URI formats used for connecting to libvirt" class="inactive" href="uri.html">URI format</a>
</div>
</li><li>
<div>
<a title="Enable remote access over TCP" class="inactive" href="remote.html">Remote access</a>
</div>
</li><li>
<div>
<a title="Configure authentication for the libvirt daemon" class="inactive" href="auth.html">Authentication</a>
</div>
</li><li>
<div>
<a title="Access the libvirt daemon from a native Windows client" class="inactive" href="windows.html">Windows port</a>
</div>
</li><li>
<div>
<span class="active">Logging</span>
</div>
</li></ul>
</div>
</li><li>
<div>
<a title="Overview of the logical subsystems in the libvirt API" class="inactive" href="intro.html">Architecture</a>
</div>
</li><li>
<div>
<a title="Description of the XML formats used in libvirt" class="inactive" href="format.html">XML format</a>
</div>
</li><li>
<div>
<a title="Hypervisor specific driver information" class="inactive" href="drivers.html">Drivers</a>
</div>
</li><li>
<div>
<a title="Reference manual for the C public API" class="inactive" href="html/index.html">API reference</a>
</div>
</li><li>
<div>
<a title="Bindings of the libvirt API for other languages" class="inactive" href="bindings.html">Language bindings</a>
</div>
</li></ul>
</div>
</li><li>
<div>
<a title="User contributed content" class="inactive" href="http://wiki.libvirt.org">Wiki</a>
</div>
</li><li>
<div>
<a title="Frequently asked questions" class="inactive" href="FAQ.html">FAQ</a>
</div>
</li><li>
<div>
<a title="How and where to report bugs and request features" class="inactive" href="bugs.html">Bug reports</a>
</div>
</li><li>
<div>
<a title="How to contact the developers via email and IRC" class="inactive" href="contact.html">Contact</a>
</div>
</li><li>
<div>
<a title="Miscellaneous links of interest related to libvirt" class="inactive" href="relatedlinks.html">Related Links</a>
</div>
</li><li>
<div>
<a title="Overview of all content on the website" class="inactive" href="sitemap.html">Sitemap</a>
</div>
</li></ul>
</div>
<div id="content">
<h1>Logging in the library and the daemon</h1>
<p>Libvirt includes logging facilities starting from version 0.6.0,
this complements the <a href="errors.html">error handling</a>
mechanism and APIs to allow tracing though the execution of the
library as well as in the libvirtd daemon.</p>
<p>The logging functionalities in libvirt are based on 3 key concepts,
similar to the one present in other generic logging facilities like
log4j:</p>
<ul><li>log messages: they are information generated at runtime by
the libvirt code, it includes a priority level (DEBUG = 1,
INFO = 2, WARNING = 3, ERROR = 4), a category, function name and
line number, indicating where it originated from, and finally
a formatted message, in addition the library adds a timestamp
at the begining of the message</li><li>log filters: it's a set of patter and priorities allowing to acept
or reject a log message, if the message category matches a filter,
the message priority is compared to the filter priority, if lower
the message is discarded, if higher the message is output. If
no filter matches, then a general priority level is applied to
all remaining messages. This allows to capture for example all
debug messages for the QEmu driver, but otherwise only allow
errors to show up from other parts</li><li>log outputs: once a message has gone though filtering a set of
output defines where to send the message, they can also filter
based on the priority, for example it may be useful to output
all messages to a debugging file but only allow errors to be
logged though syslog.</li></ul>
<p>The library configuration of logging is though 3 environment variables
allowing to control the logging behaviour:</p>
<ul><li>LIBVIRT_DEBUG: it can take the four following values:
<ul><li>1 or "debug": asking the library to log every message emitted,
though the filters can be used to avoid filling up the output</li><li>2 or "info": log all non-debugging informations</li><li>3 or "warn": log warnings and errors, that's the default value</li><li>4 or "error": log only error messages</li></ul></li><li>LIBVIRT_LOG_FILTERS: allow to define logging filters</li><li>LIBVIRT_LOG_OUTPUTS: allow to define logging outputs</li></ul>
<p>Similary the daemon logging behaviour can be tuned using 3 config
variables, stored in the configuration file:
</p>
<ul><li>log_level: accepts the following values:
<ul><li>0: no logging at all</li><li>4: only errors</li><li>3: warnings and errors</li><li>2: informations, warnings and errors</li><li>1: debug and everything</li></ul></li><li>log_filters: allow to define logging filters</li><li>log_outputs: allow to define logging outputs</li></ul>
<p>In both case the syntax for filters and outputs is similar.</p>
<p>The format for a filter is:</p>
<pre>x:name</pre>
<p>where <code>name</code> is a match string e.g. <code>remote</code> or
<code>qemu</code> and the x is the minimal level where matching messages
should be logged:</p>
<ul><li>1: DEBUG</li><li>2: INFO</li><li>3: WARNING</li><li>4: ERROR</li></ul>
<p>Multiple filter can be defined in a single string, they just need to be
separated by spaces, e.g: <code>"3:remote 4:event"</code> to only get
warning or errors from the remote layer and only errors from the event
layer.</p>
<p>
</p>
<p>The format for an output can be one of those 3 forms:</p>
<ul><li><code>x:stderr</code> output goes to stderr</li><li><code>x:syslog:name</code> use syslog for the output and use the
given <code>name</code> as the ident</li><li><code>x:file:file_path</code>output to a file, with the given
filepath</li></ul>
<p>In all cases the x prefix is the minimal level, acting as a filter:</p>
<ul><li>0: everything</li><li>1: DEBUG</li><li>2: INFO</li><li>3: WARNING</li><li>4: ERROR</li></ul>
<p>Multiple output can be defined , they just need to be separated by
spaces, e.g.: <code>"3:syslog:libvirtd 0:file:/tmp/libvirt.log"</code>
will log all warnings and errors to syslog under the libvirtd ident
but also log everything debugging and informations included in the
file <code>/tmp/libvirt.log</code></p>
<p>For example setting up the following:</p>
<pre>export LIBVIRT_DEBUG=1
export LIBVIRT_LOG_OUTPUTS="0:file:virsh.log"</pre>
<p>and then running virsh will accumulate the logs in the
<code>virsh.log</code> file in a way similar to:</p>
<pre>14:29:04.771: debug : virInitialize:278 : register drivers
14:29:04.771: debug : virRegisterDriver:618 : registering Test as driver 0</pre>
<p>the messages are timestamped, there is also the level recorded,
if debug the name of the function is also printed and then the formatted
message. This should be sufficient to at least get a precise idea of
what is happening and where things are going wrong, allowing to then
put the correct breakpoints when running under a debugger.</p>
</div>
</div>
<div id="footer">
<p id="sponsor">
Sponsored by:<br /><a href="http://et.redhat.com/"><img src="et.png" alt="Project sponsored by Red Hat Emerging Technology" /></a></p>
</div>
</body>
</html>
docs/logging.html.in 0 → 100644
浏览文件 @ e03a9027
<?xml version="1.0"?>
<html>
<body>
<h1 >Logging in the library and the daemon</h1>
<p>Libvirt includes logging facilities starting from version 0.6.0,
this complements the <a href="errors.html">error handling</a>
mechanism and APIs to allow tracing though the execution of the
library as well as in the libvirtd daemon.</p>
<p>The logging functionalities in libvirt are based on 3 key concepts,
similar to the one present in other generic logging facilities like
log4j:</p>
<ul>
<li>log messages: they are information generated at runtime by
the libvirt code, it includes a priority level (DEBUG = 1,
INFO = 2, WARNING = 3, ERROR = 4), a category, function name and
line number, indicating where it originated from, and finally
a formatted message, in addition the library adds a timestamp
at the begining of the message</li>
<li>log filters: it's a set of patter and priorities allowing to acept
or reject a log message, if the message category matches a filter,
the message priority is compared to the filter priority, if lower
the message is discarded, if higher the message is output. If
no filter matches, then a general priority level is applied to
all remaining messages. This allows to capture for example all
debug messages for the QEmu driver, but otherwise only allow
errors to show up from other parts</li>
<li>log outputs: once a message has gone though filtering a set of
output defines where to send the message, they can also filter
based on the priority, for example it may be useful to output
all messages to a debugging file but only allow errors to be
logged though syslog.</li>
</ul>
<p>The library configuration of logging is though 3 environment variables
allowing to control the logging behaviour:</p>
<ul>
<li>LIBVIRT_DEBUG: it can take the four following values:
<ul>
<li>1 or "debug": asking the library to log every message emitted,
though the filters can be used to avoid filling up the output</li>
<li>2 or "info": log all non-debugging informations</li>
<li>3 or "warn": log warnings and errors, that's the default value</li>
<li>4 or "error": log only error messages</li>
</ul></li>
<li>LIBVIRT_LOG_FILTERS: allow to define logging filters</li>
<li>LIBVIRT_LOG_OUTPUTS: allow to define logging outputs</li>
</ul>
<p>Similary the daemon logging behaviour can be tuned using 3 config
variables, stored in the configuration file:
<ul>
<li>log_level: accepts the following values:
<ul>
<li>0: no logging at all</li>
<li>4: only errors</li>
<li>3: warnings and errors</li>
<li>2: informations, warnings and errors</li>
<li>1: debug and everything</li>
</ul></li>
<li>log_filters: allow to define logging filters</li>
<li>log_outputs: allow to define logging outputs</li>
</ul>
<p>In both case the syntax for filters and outputs is similar.</p>
<p>The format for a filter is:</p>
<pre>x:name</pre>
<p>where <code>name</code> is a match string e.g. <code>remote</code> or
<code>qemu</code> and the x is the minimal level where matching messages
should be logged:</p>
<ul>
<li>1: DEBUG</li>
<li>2: INFO</li>
<li>3: WARNING</li>
<li>4: ERROR</li>
</ul>
<p>Multiple filter can be defined in a single string, they just need to be
separated by spaces, e.g: <code>"3:remote 4:event"</code> to only get
warning or errors from the remote layer and only errors from the event
layer.<p>
<p>The format for an output can be one of those 3 forms:</p>
<ul>
<li><code>x:stderr</code> output goes to stderr</li>
<li><code>x:syslog:name</code> use syslog for the output and use the
given <code>name</code> as the ident</li>
<li><code>x:file:file_path</code>output to a file, with the given
filepath</li>
</ul>
<p>In all cases the x prefix is the minimal level, acting as a filter:</p>
<ul>
<li>0: everything</li>
<li>1: DEBUG</li>
<li>2: INFO</li>
<li>3: WARNING</li>
<li>4: ERROR</li>
</ul>
<p>Multiple output can be defined , they just need to be separated by
spaces, e.g.: <code>"3:syslog:libvirtd 0:file:/tmp/libvirt.log"</code>
will log all warnings and errors to syslog under the libvirtd ident
but also log everything debugging and informations included in the
file <code>/tmp/libvirt.log</code></p>
<p>For example setting up the following:</p>
<pre>export LIBVIRT_DEBUG=1
export LIBVIRT_LOG_OUTPUTS="0:file:virsh.log"</pre>
<p>and then running virsh will accumulate the logs in the
<code>virsh.log</code> file in a way similar to:</p>
<pre>14:29:04.771: debug : virInitialize:278 : register drivers
14:29:04.771: debug : virRegisterDriver:618 : registering Test as driver 0</pre>
<p>the messages are timestamped, there is also the level recorded,
if debug the name of the function is also printed and then the formatted
message. This should be sufficient to at least get a precise idea of
what is happening and where things are going wrong, allowing to then
put the correct breakpoints when running under a debugger.</p>
</body>
</html>
docs/remote.html
浏览文件 @ e03a9027
......@@ -58,6 +58,10 @@
<div>
<a title="Access the libvirt daemon from a native Windows client" class="inactive" href="windows.html">Windows port</a>
</div>
</li><li>
<div>
<a title="The library and the daemon logging support" class="inactive" href="logging.html">Logging</a>
</div>
</li></ul>
</div>
</li><li>
......
docs/sitemap.html
浏览文件 @ e03a9027
......@@ -99,6 +99,9 @@
</li><li>
<a href="windows.html">Windows port</a>
<span>Access the libvirt daemon from a native Windows client</span>
</li><li>
<a href="logging.html">Logging</a>
<span>The library and the daemon logging support</span>
</li></ul></li><li>
<a href="intro.html">Architecture</a>
<span>Overview of the logical subsystems in the libvirt API</span>
......
docs/sitemap.html.in
浏览文件 @ e03a9027
......@@ -46,6 +46,10 @@
<a href="windows.html">Windows port</a>
<span>Access the libvirt daemon from a native Windows client</span>
</li>
<li>
<a href="logging.html">Logging</a>
<span>The library and the daemon logging support</span>
</li>
</ul>
</li>
<li>
......
docs/uri.html
浏览文件 @ e03a9027
......@@ -58,6 +58,10 @@
<div>
<a title="Access the libvirt daemon from a native Windows client" class="inactive" href="windows.html">Windows port</a>
</div>
</li><li>
<div>
<a title="The library and the daemon logging support" class="inactive" href="logging.html">Logging</a>
</div>
</li></ul>
</div>
</li><li>
......
docs/windows.html
浏览文件 @ e03a9027
......@@ -58,6 +58,10 @@
<div>
<span class="active">Windows port</span>
</div>
</li><li>
<div>
<a title="The library and the daemon logging support" class="inactive" href="logging.html">Logging</a>
</div>
</li></ul>
</div>
</li><li>
......
Markdown is supported
0% 或 .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑！
想要评论请 注册 或