Nginx virtual host traffic status module

/status/format/json
/status/format/html
/status/format/jsonp
/status/control
- If you request /status/format/json, will respond with a JSON document containing the current activity data for using in live dashboards and third-party monitoring tools.
- If you request /status/format/html, will respond with the built-in live dashboard in HTML that requests internally to /status/format/json.
- If you request /status/format/jsonp, will respond with a JSONP callback function containing the current activity data for using in live dashboards and third-party monitoring tools.
- If you request /status/control, will respond with a JSON document after it reset or delete zones through a query string. See the Control.

JSON document contains as follows:

{
    "hostName": ...,
    "nginxVersion": ...,
    "loadMsec": ...,
    "nowMsec": ...,
    "connections": {
        "active":...,
        "reading":...,
        "writing":...,
        "waiting":...,
        "accepted":...,
        "handled":...,
        "requests":...
    },
    "sharedZones": {
        "name":...,
        "maxSize":...,
        "usedSize":...,
        "usedNode":...
    },
    "serverZones": {
        "...":{
            "requestCounter":...,
            "inBytes":...,
            "outBytes":...,
            "responses":{
                "1xx":...,
                "2xx":...,
                "3xx":...,
                "4xx":...,
                "5xx":...,
                "miss":...,
                "bypass":...,
                "expired":...,
                "stale":...,
                "updating":...,
                "revalidated":...,
                "hit":...,
                "scarce":...
            },
            "requestMsec":...,
            "requestMsecs":{
                "times":[...],
                "msecs":[...]
            },
        }
        ...
    },
    "filterZones": {
        "...":{
            "...":{
                "requestCounter":...,
                "inBytes":...,
                "outBytes":...,
                "responses":{
                    "1xx":...,
                    "2xx":...,
                    "3xx":...,
                    "4xx":...,
                    "5xx":...,
                    "miss":...,
                    "bypass":...,
                    "expired":...,
                    "stale":...,
                    "updating":...,
                    "revalidated":...,
                    "hit":...,
                    "scarce":...
                },
                "requestMsec":...,
                "requestMsecs":{
                    "times":[...],
                    "msecs":[...]
                },
            },
            ...
        },
        ...
    },
    "upstreamZones": {
        "...":[
            {
                "server":...,
                "requestCounter":...,
                "inBytes":...,
                "outBytes":...,
                "responses":{
                    "1xx":...,
                    "2xx":...,
                    "3xx":...,
                    "4xx":...,
                    "5xx":...
                },
                "requestMsec":...,
                "requestMsecs":{
                    "times":[...],
                    "msecs":[...]
                },
                "responseMsec":...,
                "responseMsecs":{
                    "times":[...],
                    "msecs":[...]
                },
                "weight":...,
                "maxFails":...,
                "failTimeout":...,
                "backup":...,
                "down":...
            }
            ...
        ],
        ...
    }
    "cacheZones": {
        "...":{
            "maxSize":...,
            "usedSize":...,
            "inBytes":...,
            "outBytes":...,
            "responses":{
                "miss":...,
                "bypass":...,
                "expired":...,
                "stale":...,
                "updating":...,
                "revalidated":...,
                "hit":...,
                "scarce":...
            }
        },
        ...
    }
}

main
- Basic version, uptime((nowMsec - loadMsec)/1000)
- nowMsec, loadMsec is a millisecond.
connections
- Total connections and requests(same as stub_status_module in NGINX)
sharedZones
- The shared memory information using in nginx-module-vts.
serverZones
- Traffic(in/out) and request and response counts and cache hit ratio per each server zone
- Total traffic(In/Out) and request and response counts(It zone name is *) and hit ratio
filterZones
- Traffic(in/out) and request and response counts and cache hit ratio per each server zone filtered through the vhost_traffic_status_filter_by_set_key directive
- Total traffic(In/Out) and request and response counts(It zone name is *) and hit ratio filtered through the vhost_traffic_status_filter_by_set_key directive
upstreamZones
- Traffic(in/out) and request and response counts per server in each upstream group
- Current settings(weight, maxfails, failtimeout...) in nginx.conf
cacheZones
- Traffic(in/out) and size(capacity/used) and hit ratio per each cache zone when using the proxy_cache directive.

The directive vhost_traffic_status_display_format sets the default ouput format that is one of json or html. (Default: json)

Traffic calculation as follows:

ServerZones
- in += requested_bytes
- out += sent_bytes
FilterZones
- in += requested_bytes via the filter
- out += sent_bytes via the filter
UpstreamZones
- in += requested_bytes via the ServerZones
- out += sent_bytes via the ServerZones
cacheZones
- in += requested_bytes via the ServerZones
- out += sent_bytes via the ServerZones

All calculations are working in log processing phase of Nginx. Internal redirects(X-Accel-Redirect or error_page) does not calculate in the UpstreamZones.

Caveats: this module relies on nginx logging system(NGX_HTTP_LOG_PHASE:last phase of the nginx http), so the traffic may be in certain cirumstances different that real bandwidth traffic. Websocket, canceled downloads may be cause of inaccuracies. The working of the module doesn't matter at all whether the access_log directive "on" or "off". Again, this module works well on "access_log off". When using several domains it sets to be first domain(left) of server_name directive. If you don't want it, see the vhost_traffic_status_filter_by_host, vhost_traffic_status_filter_by_set_key directive.

See the following modules for the stream traffic statistics:

Control

It is able to reset or delete traffic zones through a query string. The request responds with a JSON document.

URI Syntax
- /{status_uri}/control?cmd={command}&group={group}&zone={name}

http {

    geoip_country /usr/share/GeoIP/GeoIP.dat;

    vhost_traffic_status_zone;
    vhost_traffic_status_filter_by_set_key $geoip_country_code country::*;

    ...

    server {

        server_name example.org;

        ...

        vhost_traffic_status_filter_by_set_key $geoip_country_code country::$server_name;

        location /status {
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}

If it set as above, then the control uri is like example.org/status/control.

The available request arguments are as follows:

cmd=<status|reset|delete>
- status
  - It returns status of traffic zones to json format like status/format/json.
- reset
  - It reset traffic zones without deleting nodes in shared memory.(= init to 0)
- delete
  - It delete traffic zones in shared memory. when re-request recreated.
group=<server|filter|upstream@alone|upstream@group|cache|*>
- server
- filter
- upstream@alone
- upstream@group
- cache
- *
zone=name
- server
  - name
- filter
  - filter_group@name
- upstream@group
  - upstream_group@name
- upstream@alone
  - @name
- cache
  - name

To get status of traffic zones on the fly

This is similar to the status/format/json except that it can get each zones.

To get fully zones

It is exactly the same with the status/format/json.
- /status/control?cmd=status&group=*

To get group zones

mainZones
- /status/control?cmd=status&group=server&zone=::main
serverZones
- /status/control?cmd=status&group=server&zone=*
filterZones
- /status/control?cmd=status&group=filter&zone=*
upstreamZones
- /status/control?cmd=status&group=upstream@group&zone=*
upstreamZones::nogroups
- /status/control?cmd=status&group=upstream@alone&zone=*
cacheZones
- /status/control?cmd=status&group=cache&zone=*

The mainZones values are default status values including hostName, nginxVersion, loadMsec, nowMsec, connections.

To get each zones

single zone in serverZones
- /status/control?cmd=status&group=server&zone=name
single zone in filterZones
- /status/control?cmd=status&group=filter&zone=filter_group@name
single zone in upstreamZones
- /status/control?cmd=status&group=upstream@group&zone=upstream_group@name
single zone in upstreamZones::nogroups
- /status/control?cmd=status&group=upstream@alone&zone=name
single zone in cacheZones
- /status/control?cmd=status&group=cache&zone=name

To reset traffic zones on the fly

It reset the values of specified zones to 0.

To reset fully zones

/status/control?cmd=reset&group=*

To reset group zones

serverZones
- /status/control?cmd=reset&group=server&zone=*
filterZones
- /status/control?cmd=reset&group=filter&zone=*
upstreamZones
- /status/control?cmd=reset&group=upstream@group&zone=*
upstreamZones::nogroups
- /status/control?cmd=reset&group=upstream@alone&zone=*
cacheZones
- /status/control?cmd=reset&group=cache&zone=*

To reset each zones

single zone in serverZones
- /status/control?cmd=reset&group=server&zone=name
single zone in filterZones
- /status/control?cmd=reset&group=filter&zone=filter_group@name
single zone in upstreamZones
- /status/control?cmd=reset&group=upstream@group&zone=upstream_group@name
single zone in upstreamZones::nogroups
- /status/control?cmd=reset&group=upstream@alone&zone=name
single zone in cacheZones
- /status/control?cmd=reset&group=cache&zone=name

To delete traffic zones on the fly

It delete the specified zones in shared memory.

To delete fully zones

/status/control?cmd=delete&group=*

To delete group zones

serverZones
- /status/control?cmd=delete&group=server&zone=*
filterZones
- /status/control?cmd=delete&group=filter&zone=*
upstreamZones
- /status/control?cmd=delete&group=upstream@group&zone=*
upstreamZones::nogroups
- /status/control?cmd=delete&group=upstream@alone&zone=*
cacheZones
- /status/control?cmd=delete&group=cache&zone=*

To delete each zones

single zone in serverZones
- /status/control?cmd=delete&group=server&zone=name
single zone in filterZones
- /status/control?cmd=delete&group=filter&zone=filter_group@name
single zone in upstreamZones
- /status/control?cmd=delete&group=upstream@group&zone=upstream_group@name
single zone in upstreamZones::nogroups
- /status/control?cmd=delete&group=upstream@alone&zone=name
single zone in cacheZones
- /status/control?cmd=delete&group=cache&zone=name

Set

It can get the status values in nginx configuration separately using vhost_traffic_status_set_by_filter directive. It can acquire almost all status values and the obtained value is stored in user-defined-variable which is first argument.

Directive Syntax
- vhost_traffic_status_set_by_filter $variable group/zone/name

http {

    geoip_country /usr/share/GeoIP/GeoIP.dat;

    vhost_traffic_status_zone;
    vhost_traffic_status_filter_by_set_key $geoip_country_code country::*;

    ...
    upstream backend {
        10.10.10.11:80;
        10.10.10.12:80;
    }

    server {

        server_name example.org;

        ...

        vhost_traffic_status_filter_by_set_key $geoip_country_code country::$server_name;

        vhost_traffic_status_set_by_filter $requestCounter server/example.org/requestCounter;
        vhost_traffic_status_set_by_filter $requestCounterKR filter/country::example.org@KR/requestCounter;

        location /backend {
            vhost_traffic_status_set_by_filter $requestCounterB1 upstream@group/[email protected]:80/requestCounter;
            proxy_pass http://backend;
        }
    }
}

The above settings are as follows:

$requestCounter
- serverZones -> example.org -> requestCounter
$requestCounterKR
- filterZones -> country::example.org -> KR -> requestCounter
$requestCounterB1
- upstreamZones -> backend -> 10.0.10.11:80 -> requestCounter

Please see the vhost_traffic_status_set_by_filter directive for detailed usage.

JSON

The following status information is provided in the JSON format:

Json used by status

/{status_uri}/format/json

/{status_uri}/control?cmd=status&...

hostName
- Host name.
nginxVersion
- Version of the provided.
loadMsec
- Loaded process time in milliseconds.
nowMsec
- Current time in milliseconds
connections
- active
  - The current number of active client connections.
- reading
  - The total number of reading client connections.
- writing
  - The total number of writing client connections.
- waiting
  - The total number of wating client connections.
- accepted
  - The total number of accepted client connections.
- handled
  - The total number of handled client connections.
- requests
  - The total number of requested client connections.
sharedZones
- name
  - The name of shared memory specified in the configuration.(default: vhost_traffic_status)
- maxSize
  - The limit on the maximum size of the shared memory specified in the configuration.
- usedSize
  - The current size of the shared memory.
- usedNode
  - The current number of node using in shared memory. It can get an approximate size for one node with the following formula: (usedSize / usedNode)
serverZones
- requestCounter
  - The total number of client requests received from clients.
- inBytes
  - The total number of bytes received from clients.
- outBytes
  - The total number of bytes sent to clients.
- responses
  - 1xx, 2xx, 3xx, 4xx, 5xx
    - The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.
  - miss
    - The number of cache miss.
  - bypass
    - The number of cache bypass.
  - expired
    - The number of cache expired.
  - stale
    - The number of cache stale.
  - updating
    - The number of cache updating.
  - revalidated
    - The number of cache revalidated.
  - hit
    - The number of cache hit.
  - scarce
    - The number of cache scare.
- requestMsec
  - The average of request processing times in milliseconds.
- requestMsecs
  - times
    - The times in milliseconds at request processing times.
  - msecs
    - The request processing times in milliseconds.
filterZones
- It provides the same fields with serverZones except that it included group names.
upstreamZones
- server
  - An address of the server.
- requestCounter
  - The total number of client connections forwarded to this server.
- inBytes
  - The total number of bytes received from this server.
- outBytes
  - The total number of bytes sent to this server.
- responses
  - 1xx, 2xx, 3xx, 4xx, 5xx
    - The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.
- requestMsec
  - The average of request processing times including upstream in milliseconds.
- requestMsecs
  - times
    - The times in milliseconds at request processing times.
  - msecs
    - The request processing times including upstream in milliseconds.
- responseMsec
  - The average of only upstream response processing times in milliseconds.
- responseMsecs
  - times
    - The times in milliseconds at request processing times.
  - msecs
    - The only upstream response processing times in milliseconds.
- weight
  - Current weight setting of the server.
- maxFails
  - Current max_fails setting of the server.
- failTimeout
  - Current fail_timeout setting of the server.
- backup
  - Current backup setting of the server.
- down
  - Current down setting of the server.
cacheZones
- maxSize
  - The limit on the maximum size of the cache specified in the configuration.
- usedSize
  - The current size of the cache.
- inBytes
  - The total number of bytes received from the cache.
- outBytes
  - The total number of bytes sent from the cache.
- responses
  - miss
    - The number of cache miss.
  - bypass
    - The number of cache bypass.
  - expired
    - The number of cache expired.
  - stale
    - The number of cache stale.
  - updating
    - The number of cache updating.
  - revalidated
    - The number of cache revalidated.
  - hit
    - The number of cache hit.
  - scarce
    - The number of cache scare.

Json used by control

/{status_uri}/control?cmd=reset&...

/{status_uri}/control?cmd=delete&...

processingReturn
- The result of true or false.
processingCommandString
- The requested command string.
processingGroupString
- The requested group string.
processingZoneString
- The requested zone string.
processingCounts
- The actual processing number.

Variables

The following embedded variables are provided:

$vts_request_counter
- The total number of client requests received from clients.
$vts_in_bytes
- The total number of bytes received from clients.
$vts_out_bytes
- The total number of bytes sent to clients.
$vts_1xx_counter
- The number of responses with status codes 1xx.
$vts_2xx_counter
- The number of responses with status codes 2xx.
$vts_3xx_counter
- The number of responses with status codes 3xx.
$vts_4xx_counter
- The number of responses with status codes 4xx.
$vts_5xx_counter
- The number of responses with status codes 5xx.
$vts_cache_miss_counter
- The number of cache miss.
$vts_cache_bypass_counter
- The number of cache bypass.
$vts_cache_expired_counter
- The number of cache expired.
$vts_cache_stale_counter
- The number of cache stale.
$vts_cache_updating_counter
- The number of cache updating.
$vts_cache_revalidated_counter
- The number of cache revalidated.
$vts_cache_hit_counter
- The number of cache hit.
$vts_cache_scarce_counter
- The number of cache scare.
$vts_request_time
- The average of request processing times.

Limit

It is able to limit total traffic per each host by using the directive vhost_traffic_status_limit_traffic. It also is able to limit all traffic by using the directive vhost_traffic_status_limit_traffic_by_set_key. When the limit is exceeded, the server will return the 503 (Service Temporarily Unavailable) error in reply to a request. The return code can be changeable.

To limit traffic for server

http {

    vhost_traffic_status_zone;

    ...

    server {

        server_name *.example.org;

        vhost_traffic_status_limit_traffic in:64G;
        vhost_traffic_status_limit_traffic out:1024G;

        ...
    }
}

Limit in/out total traffic on the *.example.org to 64G and 1024G respectively. It works individually per each domain if vhost_traffic_status_filter_by_host directive is enabled.

To limit traffic for filter

http {
    geoip_country /usr/share/GeoIP/GeoIP.dat;

    vhost_traffic_status_zone;

    ...

    server {

        server_name example.org;

        vhost_traffic_status_filter_by_set_key $geoip_country_code country::$server_name;
        vhost_traffic_status_limit_traffic_by_set_key FG@country::$server_name@US out:1024G;
        vhost_traffic_status_limit_traffic_by_set_key FG@country::$server_name@CN out:2048G;

        ...

    }
}

Limit total traffic of going into US and CN on the example.org to 1024G and 2048G respectively.

To limit traffic for upstream

http {

    vhost_traffic_status_zone;

    ...

    upstream backend {
        server 10.10.10.17:80;
        server 10.10.10.18:80;
    }

    server {

        server_name example.org;

        location /backend {
            vhost_traffic_status_limit_traffic_by_set_key UG@[email protected]:80 in:512G;
            vhost_traffic_status_limit_traffic_by_set_key UG@[email protected]:80 in:1024G;
            proxy_pass http://backend;
        }

        ...

    }
}

Limit total traffic of going into upstream backend on the example.org to 512G and 1024G per each peer.

Caveats: Traffic is the cumulative transfer or counter, not a bandwidth.

Use cases

It is able to calculate the user defined individual stats by using the directive vhost_traffic_status_filter_by_set_key.

To calculate traffic for individual country using GeoIP

http {
    geoip_country /usr/share/GeoIP/GeoIP.dat;

    vhost_traffic_status_zone;
    vhost_traffic_status_filter_by_set_key $geoip_country_code country::*;

    ...

    server {

        ...

        vhost_traffic_status_filter_by_set_key $geoip_country_code country::$server_name;

        location /status {
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}

Calculate traffic for individual country of total server groups.
Calculate traffic for individual country of each server groups.

Basically, country flags image is built-in in HTML. The country flags image is enabled if the country string is included in group name which is second argument of vhost_traffic_status_filter_by_set_key directive.

To calculate traffic for individual storage volume

http {
    vhost_traffic_status_zone;

    ...

    server {

        ...

        location ~ ^/storage/(.+)/.*$ {
            set $volume $1;
            vhost_traffic_status_filter_by_set_key $volume storage::$server_name;
        }

        location /status {
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}

Calculate traffic for individual storage volume matched by regular expression of location directive.

To calculate traffic for individual user agent

http {
    vhost_traffic_status_zone;

    map $http_user_agent $filter_user_agent {
        default 'unknown';
        ~iPhone ios;
        ~Android android;
        ~(MSIE|Mozilla) windows;
    }

    vhost_traffic_status_filter_by_set_key $filter_user_agent agent::*;

    ...

    server {

        ...

        vhost_traffic_status_filter_by_set_key $filter_user_agent agent::$server_name;

        location /status {
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}

Calculate traffic for individual http_user_agent

To calculate traffic for dynamic dns

If the domain has multiple DNS A records, you can calculate traffic for individual IPs for the domain using the filter feature or a variable in proxy_pass.

http {
    vhost_traffic_status_zone;

    upstream backend {
        elb.example.org:80;
    }

    ...

    server {

        ...

        location /backend {
            vhost_traffic_status_filter_by_set_key $upstream_addr upstream::backend;
            proxy_pass backend;
        }
    }
}

Calculate traffic for individual IPs for the domain elb.example.org. If elb.example.org has multiple DNS A records, will be display all IPs in filterZones. In the above settings, as NGINX starts up or reloads it configuration, it queries a DNS server to resolve domain and DNS A records is cached in memory. Therefore the DNS A records are not changed in memory even if DNS A records are chagned by DNS administrator unless NGINX re-starts up or reloads.

http {
    vhost_traffic_status_zone;

    resolver 10.10.10.53 valid=10s

    ...

    server {

        ...

        location /backend {
            set $backend_server elb.example.org;
            proxy_pass http://$backend_server;
        }
    }
}

Calculate traffic for individual IPs for the domain elb.example.org. If elb.example.org's DNS A record is changed, will be display both the old IP and the new IP in ::nogroups. Unlike the first upstream group setting, the second setting works well even if DNS A records are chagned by DNS administrator.

Caveats: Please more details about NGINX DNS see the dns-service-discovery-nginx-plus.

To calculate traffic except for status page

http {
    vhost_traffic_status_zone;

    ...

    server {

        ...

        location /status {
            vhost_traffic_status_bypass_limit on;
            vhost_traffic_status_bypass_stats on;
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}

The /status uri is excluded from the status traffic calculation and limit feature. See the following directives:
- vhost_traffic_status_bypass_limit
- vhost_traffic_status_bypass_stats

To maintain statistics data permanently

http {
    vhost_traffic_status_zone;
    vhost_traffic_status_dump /var/log/nginx/vts.db;

    ...

    server {

        ...

    }
}

The vhost_traffic_status_dump directive maintains statistics data permanently even if system has been rebooted or nginx has been restarted. Please see the vhost_traffic_status_dump directive for detailed usage.

Customizing

To customize after the module installed

You need to change the {{uri}} string to your status uri in status.template.html as follows:

shell> vi share/status.template.html

var vtsStatusURI = "yourStatusUri/format/json", vtsUpdateInterval = 1000;

And then, customizing and copy status.template.html to server root directory as follows:

shell> cp share/status.template.html /usr/share/nginx/html/status.html

Configure nginx.conf

   server {
       server_name example.org;
       root /usr/share/nginx/html;

       # Redirect requests for / to /status.html
       location = / {
           return 301 /status.html;
       }

       location = /status.html {}

       # Everything beginning /status (except for /status.html) is
       # processed by the status handler
       location /status {
           vhost_traffic_status_display;
           vhost_traffic_status_display_format json;
       }
   }

Access to your html.

http://example.org/status.html

To customize before the module installed

Modify share/status.template.html (Do not change {{uri}} string)
Recreate the ngx_http_vhost_traffic_status_module_html.h as follows:

shell> cd util
shell> ./tplToDefine.sh ../share/status.template.html > ../src/ngx_http_vhost_traffic_status_module_html.h

Add the module to the build configuration by adding --add-module=/path/to/nginx-module-vts
Build the nginx binary.
Install the nginx binary.

Directives

vhost_traffic_status

-	-
Syntax	vhost_traffic_status <on\|off>
Default	off
Context	http, server, location

Description: Enables or disables the module working. If you set vhost_traffic_status_zone directive, is automatically enabled.

vhost_traffic_status_zone

-	-
Syntax	vhost_traffic_status_zone [shared:name:size]
Default	shared:vhost_traffic_status:1m
Context	http

Description: Sets parameters for a shared memory zone that will keep states for various keys. The cache is shared between all worker processes.

vhost_traffic_status_dump

-	-
Syntax	vhost_traffic_status_dump path [period]
Default	-
Context	http

Description: Enables the statistics data dump and restore. The path is a location to dump the statistics data.(e.g. /var/log/nginx/vts.db) The period is a backup cycle time.(Default: 60s) It is backed up immediately regardless of the backup cycle if nginx is exited by signal(SIGKILL).

vhost_traffic_status_display

-	-
Syntax	vhost_traffic_status_display
Default	-
Context	http, server, location

Description: Enables or disables the module display handler.

vhost_traffic_status_display_format

-	-
Syntax	vhost_traffic_status_display_format <json\|html\|jsonp>
Default	json
Context	http, server, location

Description: Sets the display handler's output format. If you set json, will respond with a JSON document. If you set html, will respond with the built-in live dashboard in HTML. If you set jsonp, will respond with a JSONP callback function(default: ngx_http_vhost_traffic_status_jsonp_callback).

vhost_traffic_status_display_jsonp

-	-
Syntax	vhost_traffic_status_display_jsonp callback
Default	ngx_http_vhost_traffic_status_jsonp_callback
Context	http, server, location

Description: Sets the callback name for the JSONP.

vhost_traffic_status_display_sum_key

-	-
Syntax	vhost_traffic_status_display_sum_key name
Default	*
Context	http, server, location

Description: Sets the sum key string in serverZones field's JSON. The default sum key string is the "*".

vhost_traffic_status_filter

-	-
Syntax	vhost_traffic_status_filter <on\|off>
Default	on
Context	http, server, location

Description: Enables or disables the filter features.

vhost_traffic_status_filter_by_host

-	-
Syntax	vhost_traffic_status_filter_by_host <on\|off>
Default	off
Context	http, server, location

Description: Enables or disables the keys by Host header field. If you set on and nginx's server_name directive set several or wildcard name starting with an asterisk, e.g. “*.example.org” and requested to server with hostname such as (a|b|c).example.org or *.example.org then json serverZones is printed as follows:

server {
  server_name *.example.org;
  vhost_traffic_status_filter_by_host on;

  ...

}

  ...
  "serverZones": {
      "a.example.org": {
      ...
      },
      "b.example.org": {
      ...
      },
      "c.example.org": {
      ...
      }
      ...
   },
   ...

It provides the same function that set vhost_traffic_status_filter_by_set_key $host.

vhost_traffic_status_filter_by_set_key

-	-
Syntax	vhost_traffic_status_filter_by_set_key key [name]
Default	-
Context	http, server, location

Description: Enables the keys by user defined variable. The key is a key string to calculate traffic. The name is a group string to calculate traffic. The key and name can contain variables such as $host, $server_name. The name's group belongs to filterZones if specified. The key's group belongs to serverZones if not specified second argument name. The example with geoip module is as follows:

server {
  server_name example.org;
  vhost_traffic_status_filter_by_set_key $geoip_country_code country::$server_name;

  ...

}

  ...
  "serverZones": {
  ...
  },
  "filterZones": {
      "country::example.org": {
          "KR": {
              "requestCounter":...,
              "inBytes":...,
              "outBytes":...,
              "responses":{
                  "1xx":...,
                  "2xx":...,
                  "3xx":...,
                  "4xx":...,
                  "5xx":...,
                  "miss":...,
                  "bypass":...,
                  "expired":...,
                  "stale":...,
                  "updating":...,
                  "revalidated":...,
                  "hit":...,
                  "scarce":...
              },
              "requestMsec":...
          },
          "US": {
          ...
          },
          ...
      },
      ...
  },
  ...

vhost_traffic_status_filter_check_duplicate

-	-
Syntax	vhost_traffic_status_filter_check_duplicate <on\|off>
Default	on
Context	http, server, location

Description: Enables or disables the deduplication of vhost_traffic_status_filter_by_set_key. It is processed only one of duplicate values(key + name) in each directives(http, server, location) if this option is enabled.

vhost_traffic_status_limit

-	-
Syntax	vhost_traffic_status_limit <on\|off>
Default	on
Context	http, server, location

Description: Enables or disables the limit features.

vhost_traffic_status_limit_traffic

-	-
Syntax	vhost_traffic_status_limit_traffic member:size [code]
Default	-
Context	http, server, location

Description: Enables the traffic limit for specified member. The member is a member string to limit traffic. The size is a size(k/m/g) to limit traffic. The code is a code to return in response to rejected requests.(Default: 503)

The available member strings are as follows:

request
- The total number of client requests received from clients.
in
- The total number of bytes received from clients.
out
- The total number of bytes sent to clients.
1xx
- The number of responses with status codes 1xx.
2xx
- The number of responses with status codes 2xx.
3xx
- The number of responses with status codes 3xx.
4xx
- The number of responses with status codes 4xx.
5xx
- The number of responses with status codes 5xx.
cache_miss
- The number of cache miss.
cache_bypass
- The number of cache bypass.
cache_expired
- The number of cache expired.
cache_stale
- The number of cache stale.
cache_updating
- The number of cache updating.
cache_revalidated
- The number of cache revalidated.
cache_hit
- The number of cache hit.
cache_scarce
- The number of cache scare.

vhost_traffic_status_limit_traffic_by_set_key

-	-
Syntax	vhost_traffic_status_limit_traffic_by_set_key key member:size [code]
Default	-
Context	http, server, location

Description: Enables the traffic limit for specified key and member. The key is a key string to limit traffic. The member is a member string to limit traffic. The size is a size(k/m/g) to limit traffic. The code is a code to return in response to rejected requests.(Default: 503)

The key syntax is as follows:

group@[subgroup@]name

The available group strings are as follows:

NO
- The group of server.
UA
- The group of upstream alone.
UG
- The group of upstream group.(use subgroup)
CC
- The group of cache.
FG
- The group of filter.(use subgroup)

The available member strings are as follows:

request
- The total number of client requests received from clients.
in
- The total number of bytes received from clients.
out
- The total number of bytes sent to clients.
1xx
- The number of responses with status codes 1xx.
2xx
- The number of responses with status codes 2xx.
3xx
- The number of responses with status codes 3xx.
4xx
- The number of responses with status codes 4xx.
5xx
- The number of responses with status codes 5xx.
cache_miss
- The number of cache miss.
cache_bypass
- The number of cache bypass.
cache_expired
- The number of cache expired.
cache_stale
- The number of cache stale.
cache_updating
- The number of cache updating.
cache_revalidated
- The number of cache revalidated.
cache_hit
- The number of cache hit.
cache_scarce
- The number of cache scare.

The member is the same as vhost_traffic_status_limit_traffic directive.

vhost_traffic_status_limit_check_duplicate

-	-
Syntax	vhost_traffic_status_limit_check_duplicate <on\|off>
Default	on
Context	http, server, location

Description: Enables or disables the deduplication of vhost_traffic_status_limit_by_set_key. It is processed only one of duplicate values(member | key + member) in each directives(http, server, location) if this option is enabled.

vhost_traffic_status_set_by_filter

-	-
Syntax	vhost_traffic_status_set_by_filter $variable group/zone/name
Default	-
Context	http, server, location, if

Description: Get the specified status value stored in shared memory. It can acquire almost all status values and the obtained value is stored in $variable which is first argument.

group
- server
- filter
- upstream@alone
- upstream@group
- cache
zone
- server
  - name
- filter
  - filter_group@name
- upstream@group
  - upstream_group@name
- upstream@alone
  - @name
- cache
  - name
name
- requestCounter
  - The total number of client requests received from clients.
- requestMsec
  - The average of request processing times in milliseconds.
- responseMsec
  - The average of only upstream response processing times in milliseconds.
- inBytes
  - The total number of bytes received from clients.
- outBytes
  - The total number of bytes sent to clients.
- 1xx, 2xx, 3xx, 4xx, 5xx
  - The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.
- cacheMaxSize
  - The limit on the maximum size of the cache specified in the configuration.
- cacheUsedSize
  - The current size of the cache.
- cacheMiss
  - The number of cache miss.
- cacheBypass
  - The number of cache bypass.
- cacheExpired
  - The number of cache expired.
- cacheStale
  - The number of cache stale.
- cacheUpdating
  - The number of cache updating.
- cacheRevalidated
  - The number of cache revalidated.
- cacheHit
  - The number of cache hit.
- cacheScarce
  - The number of cache scare.
- weight
  - Current weight setting of the server.
- maxFails
  - Current max_fails setting of the server.
- failTimeout
  - Current fail_timeout setting of the server.
- backup
  - Current backup setting of the server.(0|1)
- down
  - Current down setting of the server.(0|1)

Caveats: The name is case sensitive. All return values take the integer type.

For examples:

requestCounter in serverZones
- vhost_traffic_status_set_by_filter $requestCounter server/example.org/requestCounter
requestCounter in filterZones
- vhost_traffic_status_set_by_filter $requestCounter filter/country::example.org@KR/requestCounter
requestCounter in upstreamZones
- vhost_traffic_status_set_by_filter $requestCounter upstream@group/[email protected]:80/requestCounter
requestCounter in upstreamZones::nogroups
- vhost_traffic_status_set_by_filter $requestCounter upstream@alone/10.10.10.11:80/requestCounter
cacheHit in cacheZones
- vhost_traffic_status_set_by_filter $cacheHit cache/my_cache_name/cacheHit

vhost_traffic_status_average_method

-	-
Syntax	vhost_traffic_status_average_method <AMM\|WMA> [period]
Default	AMM 60s
Context	http, server, location

Description: Sets the method which is a formula that calculate the average of response processing times. The period is an effective time of the values used for the average calculation.(Default: 60s) If period set to 0, effective time is ignored. In this case, the last average value is displayed even if there is no reqeusts and after the elapse of time. The corresponding values are requestMsec and responseMsec in JSON.

AMM
- The AMM is the arithmetic mean.
WMA
- THE WMA is the weighted moving average.

vhost_traffic_status_bypass_limit

-	-
Syntax	vhost_traffic_status_bypass_limit <on\|off>
Default	off
Context	http, server, location

Description: Enables or disables to bypass vhost_traffic_status_limit directives. The limit features is bypassed if this option is enabled. This is mostly useful if you want to connect the status web page like /status regardless of vhost_traffic_status_limit directives as follows:

http {
    vhost_traffic_status_zone;

    ...

    server {

        ...

        location /status {
            vhost_traffic_status_bypass_limit on;
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}

vhost_traffic_status_bypass_stats

-	-
Syntax	vhost_traffic_status_bypass_stats <on\|off>
Default	off
Context	http, server, location

Description: Enables or disables to bypass vhost_traffic_status. The traffic status stats features is bypassed if this option is enabled. In other words, it is excluded from the traffic status stats. This is mostly useful if you want to ignore your request in status web page like /status as follows:

http {
    vhost_traffic_status_zone;

    ...

    server {

        ...

        location /status {
            vhost_traffic_status_bypass_stats on;
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}

Name		Name	Last commit message	Last commit date
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share		share
src		src
t		t
util		util
Changes		Changes
LICENSE		LICENSE
README.md		README.md
config		config
dist.ini		dist.ini

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botranvan/nginx-module-vts

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