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Apache logs 2023
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<blockquote data-quote="Cupper" data-source="post: 577" data-attributes="member: 22"><p>This means that with the default settings (<strong>LogLevel is</strong> set to <strong>warn</strong>), requests that end with a 404 status will not get into the error logs! To fix this, you need to set the level to <strong>info</strong>:</p><p></p><p>LogLevel info</p><p>Note that if a file that is being processed by another module is not found, then that module may set its own level. For example, the php7 module, if no PHP script is found, will set the <strong>error</strong> severity level for such a message and such an entry will go to the error log even with the default settings:</p><p></p><p>[Mon Aug 19 05: 26: 02.847140 2019] [php7: error] [pid 29256] [client 115.28.240.215:1920] script '/srv/http/suip/wp-login.php' not found or unable to stat</p><p>See Why 404 Error Logs Don't Save Apache Error Logs for details.</p><p></p><p>It is recommended to use a level of at least <strong>crit</strong> (or lower significance).</p><p></p><p>For example:</p><p></p><p>LogLevel notice</p><p>Note: When recording in a conventional message file a notification with the level <strong>notice</strong> can not be suppressed and thus are always logged. However, this is not the case when logging is done using <strong>syslog</strong>.</p><p></p><p>Specifying a level without a module name will reset the level for all modules to that level. Specifying a level with a module name will set the level for that module only. You can use the module source file name, module ID, or module ID with the final _module omitted as the module specification. This means that the following three specifications are equivalent:</p><p>Code:</p><p>LogLevel info ssl: warn</p><p>LogLevel info mod_ssl.c: warn</p><p>LogLevel info ssl_module: warn</p><p></p><p>It is also possible to change the level for each directory:</p><p>Code:</p><p>LogLevel info</p><p><Directory "/ usr / local / apache / htdocs / app"></p><p> LogLevel debug</p><p></Directory></p><p></p><p>Directory-level configuration for each directory only affects messages that are logged and associated with a query after parsing. Log messages related to the server or connection are not affected. However, the latter can be affected by the LogLevelOverride directive.</p><p></p><p><strong>LogLevelOverride directive</strong></p><p>Description: Override <strong>ErrorLog verbosity</strong> for specific clients.</p><p></p><p>Syntax:</p><p>Code:</p><p>LogLevel IP_address [/ range_prefix] [module:] level [module: level] ...</p><p>Default value: not set.</p><p></p><p>Context: server config, virtual hosts.</p><p></p><p>Compatibility: Available in Apache HTTP Server 2.5.0 and later.</p><p></p><p><strong>LogLevelOverride</strong> configures the LogLevel for requests coming from specific client IP addresses. This allows you to enable verbose logging for specific test clients only. The IP address is checked at a very early state when processing the connection. Hence, <strong>LogLevelOverride</strong> allows <strong>you</strong> to change the log level for things like the SSL handshake that happen before the <strong>LogLevel</strong> directive in the <strong><If></strong> container is evaluated .</p><p></p><p>LogLevelOverride accepts either a single IP address or a <strong>CIDR</strong> IP address specification <strong>/ subnet_length</strong>. For the syntax of the loglevel specification, see The LogLevel Directive.</p><p></p><p>For requests matching the <strong>LogLevelOverride</strong> directive, the <strong>LogLevel</strong> specifications for each directory are ignored.</p><p></p><p>Examples:</p><p>Code:</p><p>LogLevelOverride 192.0.2.0/24 ssl: trace6</p><p> LogLevelOverride 192.0.2.7 ssl: trace8</p><p></p><p><strong>LogLevelOverride</strong> only affects log messages related to a request or connection. Server-related log messages are not affected.</p><p></p><p><strong>Module event log</strong></p><p>The LogLevel directive allows you to specify a logging severity threshold for each module. Thus, if you are troubleshooting a problem with only one specific module, you can increase the amount of its information in the log without receiving information about other modules that you are not interested in. This is especially useful for modules like mod_proxy or mod_rewrite where you want to know the details of what they are trying to do and what is going on in them.</p><p></p><p>Do this by specifying the module name in your <strong>LogLevel</strong> directive:</p><p></p><p>LogLevel info rewrite: trace5</p><p>This sets the main <strong>LogLevel</strong> to <strong>info</strong>, but mod_rewrite will make it to <strong>trace5</strong>.</p><p></p><p>This replaces the per-module logging directives, such as <strong>RewriteLog</strong>, that were present in earlier versions of the server.</p><p></p><p>Please note that the information generated by the modules always ends up in the error log, even if it is not, in fact, an error! Also note that some modules will not display any information unless you set the trace level in the range <strong>trace1</strong> to <strong>trace8</strong>.</p><p></p><p><strong>Programs for analyzing Apache logs.</strong></p><p><strong></strong></p><p><strong>Content</strong></p><ol> <li data-xf-list-type="ol"><strong>Programs for analyzing Apache logs</strong><br /> 1.1 Combining Apache logs into one file<br /> 1.2 GoAccess<br /> 1.3 LORG<br /> <em>1.3.1 How to edit log formats in LORG</em><br /> 1.4 ARTLAS<br /> 1.5 Analyzing logs using command line tools (Bash)</li> </ol><p><strong>Consolidating Apache Logs into One File</strong></p><p>The current Apache log file is usually stored in a plain text file called <strong>access_log</strong>, and the error log in the <strong>error_log</strong>. Logs from previous days are usually also saved, but compressed into archives. They are named <strong>access_log.1.gz</strong>, <strong>access_log.2.gz,</strong> and so on.</p><p></p><p><img src="https://sun9-43.userapi.com/impg/c858532/v858532699/1dfdef/bVz1JwrwNVA.jpg?size=614x699&quality=96&sign=98afc2807d4aa08e969478f8d7dba887&type=album" alt="bVz1JwrwNVA.jpg" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>If you need to analyze the log not only for the last day, but also for the previous ones, then all Apache logs can be combined into one file. This can be done on the command line using command grouping:</p><p>Code:</p><p>(zcat access_log. * gz && cat access_log)> biglog.txt</p><p></p><p><strong>GoAccess</strong></p><p>GoAccess is the most powerful Apache log analyzer, the program creates interactive reports that can be viewed in any browser. Works on both Linux and Windows. Suitable for general analysis of web server logs, for monitoring activity in real time, or for analyzing specific aspects of activity or problems.</p><p></p><p>Installation methods and even more examples can be found in the detailed description of this program on the page "GoAccess: a program for analyzing web server logs (full documentation, examples)".</p><p></p><p>The most typical run of the goaccess program to parse log files and generate a report that can be opened in a web browser:</p><p>Code:</p><p>cat LOG_FILE | goaccess - --log-format = FORMAT --output = FILE.html</p><p></p><p>The following log formats and values are supported for the <strong>--log-format</strong> option:</p><ul> <li data-xf-list-type="ul"><strong>COMBINED</strong> - combined log format,</li> <li data-xf-list-type="ul"><strong>VCOMBINED</strong> - a combined log format with a virtual host,</li> <li data-xf-list-type="ul"><strong>COMMON</strong> - normal log format,</li> <li data-xf-list-type="ul"><strong>VCOMMON</strong> is a common log format with a virtual host,</li> <li data-xf-list-type="ul"><strong>W3C</strong> - <strong>W3C</strong> extended log format,</li> <li data-xf-list-type="ul"><strong>SQUID</strong> is the native Squid log format,</li> <li data-xf-list-type="ul"><strong>CLOUDFRONT</strong> - Amazon CloudFront Web Distribution,</li> <li data-xf-list-type="ul"><strong>CLOUDSTORAGE</strong> - Google Cloud Storage,</li> <li data-xf-list-type="ul"><strong>AWSELB</strong> - Amazon Elastic Load Balancing,</li> <li data-xf-list-type="ul"><strong>AWSS3</strong> - Amazon Simple Storage Service (S3)</li> </ul></blockquote><p></p>
[QUOTE="Cupper, post: 577, member: 22"] This means that with the default settings ([B]LogLevel is[/B] set to [B]warn[/B]), requests that end with a 404 status will not get into the error logs! To fix this, you need to set the level to [B]info[/B]: LogLevel info Note that if a file that is being processed by another module is not found, then that module may set its own level. For example, the php7 module, if no PHP script is found, will set the [B]error[/B] severity level for such a message and such an entry will go to the error log even with the default settings: [Mon Aug 19 05: 26: 02.847140 2019] [php7: error] [pid 29256] [client 115.28.240.215:1920] script '/srv/http/suip/wp-login.php' not found or unable to stat See Why 404 Error Logs Don't Save Apache Error Logs for details. It is recommended to use a level of at least [B]crit[/B] (or lower significance). For example: LogLevel notice Note: When recording in a conventional message file a notification with the level [B]notice[/B] can not be suppressed and thus are always logged. However, this is not the case when logging is done using [B]syslog[/B]. Specifying a level without a module name will reset the level for all modules to that level. Specifying a level with a module name will set the level for that module only. You can use the module source file name, module ID, or module ID with the final _module omitted as the module specification. This means that the following three specifications are equivalent: Code: LogLevel info ssl: warn LogLevel info mod_ssl.c: warn LogLevel info ssl_module: warn It is also possible to change the level for each directory: Code: LogLevel info <Directory "/ usr / local / apache / htdocs / app"> LogLevel debug </Directory> Directory-level configuration for each directory only affects messages that are logged and associated with a query after parsing. Log messages related to the server or connection are not affected. However, the latter can be affected by the LogLevelOverride directive. [B]LogLevelOverride directive[/B] Description: Override [B]ErrorLog verbosity[/B] for specific clients. Syntax: Code: LogLevel IP_address [/ range_prefix] [module:] level [module: level] ... Default value: not set. Context: server config, virtual hosts. Compatibility: Available in Apache HTTP Server 2.5.0 and later. [B]LogLevelOverride[/B] configures the LogLevel for requests coming from specific client IP addresses. This allows you to enable verbose logging for specific test clients only. The IP address is checked at a very early state when processing the connection. Hence, [B]LogLevelOverride[/B] allows [B]you[/B] to change the log level for things like the SSL handshake that happen before the [B]LogLevel[/B] directive in the [B]<If>[/B] container is evaluated . LogLevelOverride accepts either a single IP address or a [B]CIDR[/B] IP address specification [B]/ subnet_length[/B]. For the syntax of the loglevel specification, see The LogLevel Directive. For requests matching the [B]LogLevelOverride[/B] directive, the [B]LogLevel[/B] specifications for each directory are ignored. Examples: Code: LogLevelOverride 192.0.2.0/24 ssl: trace6 LogLevelOverride 192.0.2.7 ssl: trace8 [B]LogLevelOverride[/B] only affects log messages related to a request or connection. Server-related log messages are not affected. [B]Module event log[/B] The LogLevel directive allows you to specify a logging severity threshold for each module. Thus, if you are troubleshooting a problem with only one specific module, you can increase the amount of its information in the log without receiving information about other modules that you are not interested in. This is especially useful for modules like mod_proxy or mod_rewrite where you want to know the details of what they are trying to do and what is going on in them. Do this by specifying the module name in your [B]LogLevel[/B] directive: LogLevel info rewrite: trace5 This sets the main [B]LogLevel[/B] to [B]info[/B], but mod_rewrite will make it to [B]trace5[/B]. This replaces the per-module logging directives, such as [B]RewriteLog[/B], that were present in earlier versions of the server. Please note that the information generated by the modules always ends up in the error log, even if it is not, in fact, an error! Also note that some modules will not display any information unless you set the trace level in the range [B]trace1[/B] to [B]trace8[/B]. [B]Programs for analyzing Apache logs. Content[/B] [LIST=1] [*][B]Programs for analyzing Apache logs[/B] 1.1 Combining Apache logs into one file 1.2 GoAccess 1.3 LORG [I]1.3.1 How to edit log formats in LORG[/I] 1.4 ARTLAS 1.5 Analyzing logs using command line tools (Bash) [/LIST] [B]Consolidating Apache Logs into One File[/B] The current Apache log file is usually stored in a plain text file called [B]access_log[/B], and the error log in the [B]error_log[/B]. Logs from previous days are usually also saved, but compressed into archives. They are named [B]access_log.1.gz[/B], [B]access_log.2.gz,[/B] and so on. [IMG alt="bVz1JwrwNVA.jpg"]https://sun9-43.userapi.com/impg/c858532/v858532699/1dfdef/bVz1JwrwNVA.jpg?size=614x699&quality=96&sign=98afc2807d4aa08e969478f8d7dba887&type=album[/IMG] If you need to analyze the log not only for the last day, but also for the previous ones, then all Apache logs can be combined into one file. This can be done on the command line using command grouping: Code: (zcat access_log. * gz && cat access_log)> biglog.txt [B]GoAccess[/B] GoAccess is the most powerful Apache log analyzer, the program creates interactive reports that can be viewed in any browser. Works on both Linux and Windows. Suitable for general analysis of web server logs, for monitoring activity in real time, or for analyzing specific aspects of activity or problems. Installation methods and even more examples can be found in the detailed description of this program on the page "GoAccess: a program for analyzing web server logs (full documentation, examples)". The most typical run of the goaccess program to parse log files and generate a report that can be opened in a web browser: Code: cat LOG_FILE | goaccess - --log-format = FORMAT --output = FILE.html The following log formats and values are supported for the [B]--log-format[/B] option: [LIST] [*][B]COMBINED[/B] - combined log format, [*][B]VCOMBINED[/B] - a combined log format with a virtual host, [*][B]COMMON[/B] - normal log format, [*][B]VCOMMON[/B] is a common log format with a virtual host, [*][B]W3C[/B] - [B]W3C[/B] extended log format, [*][B]SQUID[/B] is the native Squid log format, [*][B]CLOUDFRONT[/B] - Amazon CloudFront Web Distribution, [*][B]CLOUDSTORAGE[/B] - Google Cloud Storage, [*][B]AWSELB[/B] - Amazon Elastic Load Balancing, [*][B]AWSS3[/B] - Amazon Simple Storage Service (S3) [/LIST] [/QUOTE]
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