Error log configuration and access log configuration and log records

Error log configuration and access log configuration
[Root@slave nginx]# vi/etc/nginx/nginx.conf
Worker_processes 1;
Error_log/var/log/nginx/error.log;
Events {
Worker_connections 1024;
}
HTTP {
Include Mime.types;
Default_type Application/octet-stream;
Sendfile on;
Keepalive_timeout 65;
Log_format comman ' $remote _addr-$remote _user [$time _local] "$request" '
' $status $body _bytes_sent ' $http _referer '
"$http _user_agent" "$request _body" "$request _time";
server {
Listen 80;
server_name www.wolf.com wolf.com;
Location/{
Root html/www;
Index index.html index.htm;
}
Access_log/var/log/nginx/www.log Comman;
}
server {
Listen 80;
server_name bbs.wolf.com;
Location/{
Root Html/bbs;
Index index.html index.htm;
}
}
server {
Listen 80;
server_name blog.wolf.com;
Location/{
Root Html/blog;
Index index.html index.htm;
}
}
# #status
server {
Listen 80;
server_name status.wolf.com;
Location/{
Stub_status on;
Access_log off;
}
}
}
The configuration is complete and the test is as follows
[Root@slave nginx]# Curl www.wolf.com
Http://www.wolf.com
[Root@slave nginx]# tail-f Www.log
192.168.0.203--[11/jun/2016:16:26:52 +0800] "get/http/1.1"-"" curl/7.19.7 (X86_64-REDHAT-LINUX-GNU) libcurl/ 7.19.7 nss/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2 ""-"" 0.000 "

Accessing Tests through a browser

============================================================

Logs are very advantageous for statistical troubleshooting.
This article summarizes the Nginx log-related configuration such as Access_log, Log_format, Open_log_file_cache
, Log_not_found, Log_subrequest, Rewrite_log, Error_log.
Nginx has a very flexible logging mode. Each level of configuration can have its own independent access logs.
The log format is defined by the Log_format command.
The ngx_http_log_module is used to define the request log format.
1. Access_log Instructions
Syntax: access_log path [format [Buffer=size [Flush=time]];
Access_log path Format gzip[=level] [buffer=size] [flush=time];
Access_log Syslog:server=address[,parameter=value] [format];
Access_log off;
Default value: Access_log logs/access.log combined;
Configuration segment: HTTP, server, location, if in location, limit_except
gzip compression level.
Buffer sets the memory buffer size.
The maximum amount of time that flush is saved in the cache.
Log not logged: Access_log off;
Logging using the default combined format: Access_log logs/access.log or Access_log logs/access.log combined;
2. log_format directive
Syntax: Log_format name string ...;
Default value: Log_format combined "...";
Configuration segment: http
Name represents the format name, and string represents the format of the literal.
Log_format has a default combined log format that does not have to be set, equivalent to the Apache combined log format, as follows:
Log_format combined ' $remote _addr-$remote _user [$time _local] '
"$request" $status $body _bytes_sent '
' "$http _referer" "$http _user_agent";
If the nginx is in the load balancer, after squid,nginx the reverse proxy, the Web server cannot obtain the real IP address of the client directly.
$remote _addr Gets the IP address of the reverse proxy. The reverse proxy server can add x-forwarded-for information to the HTTP header of the forwarding request,
The server address used to record client IP addresses and client requests.
PS: Get the user real IP see http://www.ttlsa.com/html/2235.html below:
Log_format porxy ' $http _x_forwarded_for-$remote _user [$time _local] '
"$request" $status $body _bytes_sent '
' "$http _referer" "$http _user_agent";
The log format allows for the inclusion of variable annotations as follows:
$remote _addr, $http _x_forwarded_for log client IP address
$remote _user record the client user name
$request record the URL and HTTP protocol for the request
$status Record Request Status
$body _bytes_sent the number of bytes sent to the client, excluding the size of the response header, which is compatible with the "%B" parameter in the Apache module MOD_LOG_CONFIG.
The total number of bytes $bytes _sent sent to the client.
$connection the serial number of the connection.
$connection _requests The number of requests currently obtained through a connection.
$msec Log write time. The unit is seconds, and the precision is milliseconds.
$pipe if the request is sent over an HTTP pipelining (pipelined), the pipe value is "P", otherwise ".".
$http _referer record from which page the link was accessed.
$http _user_agent Record client browser-related information
$request the length of the _length request (including the request line, the request header, and the request body).
$request _time request processing time in seconds, precision milliseconds, starting with the first byte read into the client until the last word is character to the client for log writes.
$time The local time in _iso8601 ISO8601 standard format.
$time The local time in the _local common log format.
[WARNING] The response header sent to the client has a "sent_http_" prefix. Like $sent_http_content_range. [/warning]
Examples are as follows:
HTTP {
Log_format Main ' $remote _addr-$remote _user [$time _local] "$request" '
"$status" $body _bytes_sent "$http _referer"
' "$http _user_agent" "$http _x_forwarded_for" '
' "$gzip _ratio" $request _time $bytes _sent $request _length ';

Log_format srcache_log ' $remote _addr-$remote _user [$time _local] "$request" '
"$status" $body _bytes_sent $request _time $bytes _sent $request _length '
' [$upstream _response_time] [$srcache _fetch_status] [$srcache _store_status] [$srcache _expire] ';

Open_log_file_cache max=1000 inactive=60s;

server {
Server_Name ~^ (www\.)? (.+)$;
Access_log Logs/$2-access.log Main;
Error_log Logs/$2-error.log;

Location/srcache {
Access_log Logs/access-srcache.log Srcache_log;
}
}
}

3. Open_log_file_cache Instructions
Syntax: Open_log_file_cache max=n [Inactive=time] [min_uses=n] [valid=time];
Open_log_file_cache off;
Default value: Open_log_file_cache off;
Configuration segment: HTTP, server, location
For each log record, the file is opened, written to the log, and then closed. You can use Open_log_file_cache to set the log file cache (which is off by default) in the following format:
The parameter comments are as follows:
Max: Sets the maximum number of file descriptors in the cache, and uses the LRU algorithm to close the descriptor if the cache is full.
Inactive: Set survival time, default is 10s
Min_uses: Set the log file descriptor into the cache after the minimum number of times it is used in the inactive time period, 1 times by default
Valid: Set check frequency, default 60s
Off: Disable caching
Examples are as follows:
Open_log_file_cache max=1000 inactive=20s valid=1m min_uses=2;
4. Log_not_found Instructions
Syntax: Log_not_found on | Off
Default value: Log_not_found on;
Configuration segment: HTTP, server, location
Whether a non-existent error is logged in the Error_log. The default is.
5. Log_subrequest Instructions
Syntax: Log_subrequest on | Off
Default value: Log_subrequest off;
Configuration segment: HTTP, server, location
Whether to record the access log for the child request in the Access_log. Default is not logged.
6. Rewrite_log Instructions
Provided by the Ngx_http_rewrite_module module. Used to record the rewrite log. For debug rewrite rules, it is recommended to open. Nginx Rewrite rules guide
Syntax: Rewrite_log on | Off
Default value: Rewrite_log off;
Configuration segment: HTTP, server, location, if
When enabled, an notice level rewrite log is logged in error log.
7. Error_log Instructions
Syntax: Error_log file | stderr | Syslog:server=address[,parameter=value] [Debug | info | notice | warn | error | crit | alert | Emerg];
Default value: Error_log logs/error.log error;
Configuration segment: Main, HTTP, server, location
Configure the error log.


This article summarizes the Nginx log-related configuration such as Access_log, Log_format, Open_log_file_cache
, Log_not_found, Log_subrequest, Rewrite_log, Error_log.
Nginx has a very flexible logging mode. Each level of configuration can have its own independent access logs.
The log format is defined by the Log_format command.
The ngx_http_log_module is used to define the request log format.
1. Access_log Instructions
Syntax: access_log path [format [Buffer=size [Flush=time]];
Access_log path Format gzip[=level] [buffer=size] [flush=time];
Access_log Syslog:server=address[,parameter=value] [format];
Access_log off;
Default value: Access_log logs/access.log combined;
Configuration segment: HTTP, server, location, if in location, limit_except
gzip compression level.
Buffer sets the memory buffer size.
The maximum amount of time that flush is saved in the cache.
Log not logged: Access_log off;
Logging using the default combined format: Access_log logs/access.log or Access_log logs/access.log combined;
2. log_format directive
Syntax: Log_format name string ...;
Default value: Log_format combined "...";
Configuration segment: http
Name represents the format name, and string represents the format of the literal.
Log_format has a default combined log format that does not have to be set, equivalent to the Apache combined log format, as follows:
Log_format combined ' $remote _addr-$remote _user [$time _local] '
"$request" $status $body _bytes_sent '
' "$http _referer" "$http _user_agent";
If the nginx is in the load balancer, after squid,nginx the reverse proxy, the Web server cannot obtain the real IP address of the client directly.
$remote _addr Gets the IP address of the reverse proxy. The reverse proxy server can add x-forwarded-for information to the HTTP header of the forwarding request,
The server address used to record client IP addresses and client requests.
PS: Get the user real IP see http://www.ttlsa.com/html/2235.html below:
Log_format porxy ' $http _x_forwarded_for-$remote _user [$time _local] '
"$request" $status $body _bytes_sent '
' "$http _referer" "$http _user_agent";
The log format allows for the inclusion of variable annotations as follows:
$remote _addr, $http _x_forwarded_for log client IP address
$remote _user record the client user name
$request record the URL and HTTP protocol for the request
$status Record Request Status
$body _bytes_sent the number of bytes sent to the client, excluding the size of the response header, which is compatible with the "%B" parameter in the Apache module MOD_LOG_CONFIG.
The total number of bytes $bytes _sent sent to the client.
$connection the serial number of the connection.
$connection _requests The number of requests currently obtained through a connection.
$msec Log write time. The unit is seconds, and the precision is milliseconds.
$pipe if the request is sent over an HTTP pipelining (pipelined), the pipe value is "P", otherwise ".".
$http _referer record from which page the link was accessed.
$http _user_agent Record client browser-related information
$request the length of the _length request (including the request line, the request header, and the request body).
$request _time request processing time in seconds, precision milliseconds, starting with the first byte read into the client until the last word is character to the client for log writes.
$time The local time in _iso8601 ISO8601 standard format.
$time The local time in the _local common log format.
[WARNING] The response header sent to the client has a "sent_http_" prefix. Like $sent_http_content_range. [/warning]
Examples are as follows:
HTTP {
Log_format Main ' $remote _addr-$remote _user [$time _local] "$request" '
"$status" $body _bytes_sent "$http _referer"
' "$http _user_agent" "$http _x_forwarded_for" '
' "$gzip _ratio" $request _time $bytes _sent $request _length ';

Log_format srcache_log ' $remote _addr-$remote _user [$time _local] "$request" '
"$status" $body _bytes_sent $request _time $bytes _sent $request _length '
' [$upstream _response_time] [$srcache _fetch_status] [$srcache _store_status] [$srcache _expire] ';

Open_log_file_cache max=1000 inactive=60s;

server {
Server_Name ~^ (www\.)? (.+)$;
Access_log Logs/$2-access.log Main;
Error_log Logs/$2-error.log;

Location/srcache {
Access_log Logs/access-srcache.log Srcache_log;
}
}
}

3. Open_log_file_cache Instructions
Syntax: Open_log_file_cache max=n [Inactive=time] [min_uses=n] [valid=time];
Open_log_file_cache off;
Default value: Open_log_file_cache off;
Configuration segment: HTTP, server, location
For each log record, the file is opened, written to the log, and then closed. You can use Open_log_file_cache to set the log file cache (which is off by default) in the following format:
The parameter comments are as follows:
Max: Sets the maximum number of file descriptors in the cache, and uses the LRU algorithm to close the descriptor if the cache is full.
Inactive: Set survival time, default is 10s
Min_uses: Set the log file descriptor into the cache after the minimum number of times it is used in the inactive time period, 1 times by default
Valid: Set check frequency, default 60s
Off: Disable caching
Examples are as follows:
Open_log_file_cache max=1000 inactive=20s valid=1m min_uses=2;
4. Log_not_found Instructions
Syntax: Log_not_found on | Off
Default value: Log_not_found on;
Configuration segment: HTTP, server, location
Whether a non-existent error is logged in the Error_log. The default is.
5. Log_subrequest Instructions
Syntax: Log_subrequest on | Off
Default value: Log_subrequest off;
Configuration segment: HTTP, server, location
Whether to record the access log for the child request in the Access_log. Default is not logged.
6. Rewrite_log Instructions
Provided by the Ngx_http_rewrite_module module. Used to record the rewrite log. For debug rewrite rules, it is recommended to open. Nginx Rewrite rules guide
Syntax: Rewrite_log on | Off
Default value: Rewrite_log off;
Configuration segment: HTTP, server, location, if
When enabled, an notice level rewrite log is logged in error log.
7. Error_log Instructions
Syntax: Error_log file | stderr | Syslog:server=address[,parameter=value] [Debug | info | notice | warn | error | crit | alert | Emerg];
Default value: Error_log logs/error.log error;
Configuration segment: Main, HTTP, server, location
Configure the error log.

The above describes the error log configuration and access log configuration as well as log records, including aspects of the content, I hope to be interested in PHP tutorial friends helpful.

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