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lighttpd2/src/modules/mod_status.c

533 lines
19 KiB

14 years ago
/*
* mod_status - display server status
*
* Description:
* mod_status can display a page with statistics like requests, traffic and active connections
* it can be customized with different stylesheets (css)
*
* Setups:
* none
* Options:
* status.css <name|url> - set the stylesheet to use
* type: string; values: "default", "blue" or a url to an external css file
* Actions:
* status.page - returns the status page to the client
*
* Example config:
* req.path == "/status" {
* status.css = "http://mydomain/status.css";
* status.page;
* }
*
* Todo:
* - handle race condition when connection is gone while collecting data (needs per connection plugin data)
*
* Author:
* Copyright (c) 2008 Thomas Porzelt
* License:
* MIT, see COPYING file in the lighttpd 2 tree
*/
#include <lighttpd/base.h>
#include <lighttpd/collect.h>
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LI_API gboolean mod_status_init(modules *mods, module *mod);
LI_API gboolean mod_status_free(modules *mods, module *mod);
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/* html snippet constants */
static const gchar header[] =
"<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>\n"
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n"
"<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">\n"
" <head>\n"
" <title>Lighttpd Status</title>\n";
static const gchar html_top[] =
" <div class=\"header\">Lighttpd Server Status</div>\n"
" <div class=\"spacer\">\n"
" <strong>Hostname</strong>: <span>%s</span>"
" <strong>Uptime</strong>: <span>%s</span>\n"
" <strong>Started at</strong>: <span>%s</span>\n"
" <strong>Version</strong>: <span>" PACKAGE_VERSION " (" __DATE__ " " __TIME__ ")</span>\n"
" </div>\n";
static const gchar html_worker_th[] =
" <table cellspacing=\"0\">\n"
" <tr>\n"
" <th style=\"width: 100px;\"></th>\n"
" <th>Requests</th>\n"
" <th>Traffic in</th>\n"
" <th>Traffic out</th>\n"
" <th>Active connections</th>\n"
" </tr>\n";
static const gchar html_worker_th_avg[] =
" <table cellspacing=\"0\">\n"
" <tr>\n"
" <th style=\"width: 100px;\"></th>\n"
" <th>Requests / s</th>\n"
" <th>Traffic in / s</th>\n"
" <th>Traffic out / s</th>\n"
" <th>Active connections</th>\n"
" </tr>\n";
static const gchar html_worker_row[] =
" <tr class=\"%s\">\n"
" <td class=\"left\">%s</td>\n"
" <td>%s (%" G_GUINT64_FORMAT "%%)</td>\n"
" <td>%s (%" G_GUINT64_FORMAT "%%)</td>\n"
" <td>%s (%" G_GUINT64_FORMAT "%%)</td>\n"
" <td>%u (%u%%)</td>\n"
" </tr>\n";
static const gchar html_worker_row_avg[] =
" <tr class=\"%s\">\n"
" <td class=\"left\">%s</td>\n"
" <td>%s</td>\n"
" <td>%s</td>\n"
" <td>%s</td>\n"
" <td>%u</td>\n"
" </tr>\n";
static const gchar html_connections_th[] =
" <table cellspacing=\"0\">\n"
" <tr>\n"
" <th class=\"left\" style=\"width: 200px;\">Client</th>\n"
" <th>State</th>\n"
" <th>Host</th>\n"
" <th class=\"left\" style=\"width: 250px;\">Path</th>\n"
" <th style=\"width: 100px;\">Duration</th>\n"
" <th style=\"width: 150px;\">Traffic in/out</th>\n"
" <th style=\"width: 150px;\">Traffic in/out / s</th>\n"
" </tr>\n";
static const gchar html_connections_row[] =
" <tr>\n"
" <td class=\"left\">%s</td>\n"
" <td>%s</td>\n"
" <td>%s</td>\n"
" <td class=\"left\">%s</td>\n"
" <td>%s</td>\n"
" <td>%s / %s</td>\n"
" <td>%s / %s</td>\n"
" </tr>\n";
static const gchar css_default[] =
" <style type=\"text/css\">\n"
" body { margin: 0; padding: 0; font-family: \"lucida grande\",tahoma,verdana,arial,sans-serif; font-size: 12px; }\n"
" .header { padding: 5px; background-color: #6D84B4; font-size: 16px; color: white; border: 1px solid #3B5998; font-weight: bold; }\n"
" .spacer { background-color: #F2F2F2; border-bottom: 1px solid #CCC; padding: 5px; }\n"
" .spacer span { padding-right: 25px; }\n"
" .title { margin-left: 6px; margin-top: 25px; margin-bottom: 5px; }\n"
" table { margin-left: 5px; border: 1px solid #CCC; }\n"
" th { font-weight: normal; padding: 3px; width: 175px; background-color: #E0E0E0;\n"
" border-bottom: 1px solid #BABABA; border-right: 1px solid #BABABA; border-top: 1px solid #FEFEFE; }\n"
" td { text-align: right; padding: 3px; border-bottom: 1px solid #F0F0F0; border-right: 1px solid #F8F8F8; }\n"
" .left { text-align: left; }\n"
" .totals td { border-top: 1px solid #DDDDDD; }\n"
" </style>\n";
/* blue theme by nitrox */
static const gchar css_blue[] =
" <style type=\"text/css\">\n"
" body { margin: 0; padding: 0; font-family: \"lucida grande\",tahoma,verdana,arial,sans-serif; font-size: 12px; background-color: #6d84b4; }\n"
" .header { padding: 5px; background-color: #6D84B4; font-size: 16px; color: white; border: 1px solid #3B5998; font-weight: bold; }\n"
" .spacer { background-color: #F2F2F2; border-bottom: 1px solid #CCC; padding: 5px; }\n"
" .spacer span { padding-right: 25px; }\n"
" .title { margin-left: 5px; margin-top: 25px; margin-bottom: 5px; }\n"
" table { margin-left: 5px; border: 1px solid #CCC; }\n"
" th { font-weight: normal; padding: 3px; width: 175px; background-color: #E0E0E0;\n"
" border-bottom: 1px solid #BABABA; border-right: 1px solid #BABABA; border-top: 1px solid #FEFEFE; }\n"
" td { text-align: right; padding: 3px; border-bottom: 1px solid #F0F0F0; border-right: 1px solid #F8F8F8; }\n"
" .left { text-align: left; }\n"
" .totals td { border-top: 1px solid #DDDDDD; }\n"
" </style>\n";
struct mod_status_wrk_data;
typedef struct mod_status_wrk_data mod_status_wrk_data;
struct mod_status_con_data;
typedef struct mod_status_con_data mod_status_con_data;
struct mod_status_con_data {
guint worker_ndx;
connection_state_t state;
GString *remote_addr_str, *local_addr_str;
gboolean is_ssl, keep_alive;
GString *host, *path;
ev_tstamp ts;
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guint64 bytes_in;
guint64 bytes_out;
guint64 bytes_in_5s_diff;
guint64 bytes_out_5s_diff;
};
struct mod_status_wrk_data {
guint worker_ndx;
statistics_t stats;
GArray *connections;
};
/* the CollectFunc */
static gpointer status_collect_func(worker *wrk, gpointer fdata) {
mod_status_wrk_data *sd = g_slice_new(mod_status_wrk_data);
UNUSED(fdata);
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sd->stats = wrk->stats;
sd->worker_ndx = wrk->ndx;
/* gather connection info */
sd->connections = g_array_sized_new(FALSE, TRUE, sizeof(mod_status_con_data), wrk->connections_active);
g_array_set_size(sd->connections, wrk->connections_active);
for (guint i = 0; i < wrk->connections_active; i++) {
connection *c = g_array_index(wrk->connections, connection*, i);
mod_status_con_data *cd = &g_array_index(sd->connections, mod_status_con_data, i);
cd->is_ssl = c->is_ssl;
cd->keep_alive = c->keep_alive;
cd->remote_addr_str = g_string_new_len(GSTR_LEN(c->remote_addr_str));
cd->local_addr_str = g_string_new_len(GSTR_LEN(c->local_addr_str));
cd->host = g_string_new_len(GSTR_LEN(c->mainvr->request.uri.host));
cd->path = g_string_new_len(GSTR_LEN(c->mainvr->request.uri.path));
cd->state = c->state;
cd->ts = c->ts;
cd->bytes_in = c->stats.bytes_in;
cd->bytes_out = c->stats.bytes_out;
cd->bytes_in_5s_diff = c->stats.bytes_in_5s_diff;
cd->bytes_out_5s_diff = c->stats.bytes_out_5s_diff;
}
return sd;
}
/* the CollectCallback */
static void status_collect_cb(gpointer cbdata, gpointer fdata, GPtrArray *result, gboolean complete) {
vrequest *vr = cbdata;
UNUSED(fdata);
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if (complete) {
GString *css;
GString *tmpstr;
guint total_connections = 0;
/* we got everything */
statistics_t totals = {
G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0),
G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0),
G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0), G_GUINT64_CONSTANT(0),
0, 0, G_GUINT64_CONSTANT(0), 0, 0
};
GString *html = g_string_sized_new(8 * 1024);
VR_DEBUG(vr, "finished collecting data: %s", complete ? "complete" : "not complete");
vr->response.http_status = 200;
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/* calculate total stats over all workers */
for (guint i = 0; i < result->len; i++) {
mod_status_wrk_data *sd = g_ptr_array_index(result, i);
totals.bytes_out += sd->stats.bytes_out;
totals.bytes_in += sd->stats.bytes_in;
totals.requests += sd->stats.requests;
totals.actions_executed += sd->stats.actions_executed;
total_connections += sd->connections->len;
totals.requests_5s_diff += sd->stats.requests_5s_diff;
totals.bytes_in_5s_diff += sd->stats.bytes_in_5s_diff;
totals.bytes_out_5s_diff += sd->stats.bytes_out_5s_diff;
totals.active_cons_cum += sd->stats.active_cons_cum;
totals.active_cons_5s += sd->stats.active_cons_5s;
}
g_string_append_len(html, header, sizeof(header)-1);
/* css */
css = _OPTION(vr, ((plugin*)fdata), 0).string;
if (!css || !css->len) /* default css */
g_string_append_len(html, css_default, sizeof(css_default)-1);
else if (g_str_equal(css->str, "blue")) /* blue css */
g_string_append_len(html, css_blue, sizeof(css_blue)-1);
else /* external css */
g_string_append_printf(html, " <link rel=\"stylesheet\" rev=\"stylesheet\" href=\"%s\" media=\"screen\" />\n", css->str);
g_string_append_len(html, CONST_STR_LEN(
" </head>\n"
" <body>\n"
));
tmpstr = counter_format2((guint64)(CUR_TS(vr->con->wrk) - vr->con->srv->started), COUNTER_TIME, -1);
g_string_append_printf(html, html_top,
vr->request.uri.host->str,
tmpstr->str,
vr->con->srv->started_str->str
);
/* worker information, absolute values */
{
GString *count_req, *count_bin, *count_bout;
g_string_append_len(html, CONST_STR_LEN(" <div class=\"title\"><strong>Absolute stats</strong> (since start)</div>\n"));
g_string_append_len(html, html_worker_th, sizeof(html_worker_th)-1);
#define PERCENTAGE(x, y) (y ? (x * 100 / y) : 0)
for (guint i = 0; i < result->len; i++) {
mod_status_wrk_data *sd = g_ptr_array_index(result, i);
count_req = counter_format2(sd->stats.requests, COUNTER_UNITS, -1);
count_bin = counter_format2(sd->stats.bytes_in, COUNTER_BYTES, 2);
count_bout = counter_format2(sd->stats.bytes_out, COUNTER_BYTES, 2);
g_string_printf(tmpstr, "Worker #%u", i+1);
g_string_append_printf(html, html_worker_row, "", tmpstr->str,
count_req->str, PERCENTAGE(sd->stats.requests, totals.requests),
count_bin->str, PERCENTAGE(sd->stats.bytes_in, totals.bytes_in),
count_bout->str, PERCENTAGE(sd->stats.bytes_out, totals.bytes_out),
sd->connections->len, PERCENTAGE(sd->connections->len, total_connections));
g_string_free(count_req, TRUE);
g_string_free(count_bin, TRUE);
g_string_free(count_bout, TRUE);
}
#undef PERCENTAGE
count_req = counter_format2(totals.requests, COUNTER_UNITS, -1);
count_bin = counter_format2(totals.bytes_in, COUNTER_BYTES, 2);
count_bout = counter_format2(totals.bytes_out, COUNTER_BYTES, 2);
g_string_append_printf(html, html_worker_row, "totals", "Total",
count_req->str, G_GUINT64_CONSTANT(100),
count_bin->str, G_GUINT64_CONSTANT(100),
count_bout->str, G_GUINT64_CONSTANT(100),
total_connections, 100);
g_string_append_len(html, CONST_STR_LEN(" </table>\n"));
g_string_free(count_req, TRUE);
g_string_free(count_bin, TRUE);
g_string_free(count_bout, TRUE);
}
/* worker information, avg values */
{
GString *count_req, *count_bin, *count_bout;
guint uptime = CUR_TS(vr->con->wrk) - vr->con->srv->started;
if (!uptime)
uptime = 1;
g_string_append_len(html, CONST_STR_LEN("<div class=\"title\"><strong>Average stats</strong> (since start)</div>\n"));
g_string_append_len(html, html_worker_th_avg, sizeof(html_worker_th_avg)-1);
#define PERCENTAGE(x) (sd->stat ## x ? (sd->stat ## x * 100 / total ## x) : 0)
for (guint i = 0; i < result->len; i++) {
mod_status_wrk_data *sd = g_ptr_array_index(result, i);
count_req = counter_format2(sd->stats.requests / uptime, COUNTER_UNITS, -1);
count_bin = counter_format2(sd->stats.bytes_in / uptime, COUNTER_BYTES, 2);
count_bout = counter_format2(sd->stats.bytes_out / uptime, COUNTER_BYTES, 2);
g_string_printf(tmpstr, "Worker #%u", i+1);
g_string_append_printf(html, html_worker_row_avg, "", tmpstr->str,
count_req->str,
count_bin->str,
count_bout->str,
(guint)(sd->stats.active_cons_cum / uptime)
);
g_string_free(count_req, TRUE);
g_string_free(count_bin, TRUE);
g_string_free(count_bout, TRUE);
}
#undef PERCENTAGE
count_req = counter_format2(totals.requests / uptime, COUNTER_UNITS, -1);
count_bin = counter_format2(totals.bytes_in / uptime, COUNTER_BYTES, 2);
count_bout = counter_format2(totals.bytes_out / uptime, COUNTER_BYTES, 2);
g_string_append_printf(html, html_worker_row_avg, "totals", "Total",
count_req->str,
count_bin->str,
count_bout->str,
(guint)(totals.active_cons_cum / uptime)
);
g_string_append_len(html, CONST_STR_LEN(" </table>\n"));
g_string_free(count_req, TRUE);
g_string_free(count_bin, TRUE);
g_string_free(count_bout, TRUE);
}
/* worker information, 5 seconds avg values */
{
GString *count_req, *count_bin, *count_bout;
time_t uptime = CUR_TS(vr->con->wrk) - vr->con->srv->started;
if (!uptime)
uptime = 1;
g_string_append_len(html, CONST_STR_LEN("<div class=\"title\"><strong>Average stats</strong> (5 seconds)</div>\n"));
g_string_append_len(html, html_worker_th_avg, sizeof(html_worker_th_avg)-1);
#define PERCENTAGE(x) (sd->stat ## x ? (sd->stat ## x * 100 / total ## x) : 0)
for (guint i = 0; i < result->len; i++) {
mod_status_wrk_data *sd = g_ptr_array_index(result, i);
count_req = counter_format2(sd->stats.requests_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_UNITS, -1);
count_bin = counter_format2(sd->stats.bytes_in_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_BYTES, 2);
count_bout = counter_format2(sd->stats.bytes_out_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_BYTES, 2);
g_string_printf(tmpstr, "Worker #%u", i+1);
g_string_append_printf(html, html_worker_row_avg, "", tmpstr->str,
count_req->str,
count_bin->str,
count_bout->str,
sd->stats.active_cons_5s
);
g_string_free(count_req, TRUE);
g_string_free(count_bin, TRUE);
g_string_free(count_bout, TRUE);
}
#undef PERCENTAGE
count_req = counter_format2(totals.requests_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_UNITS, -1);
count_bin = counter_format2(totals.bytes_in_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_BYTES, 2);
count_bout = counter_format2(totals.bytes_out_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_BYTES, 2);
g_string_append_printf(html, html_worker_row_avg, "totals", "Total",
count_req->str,
count_bin->str,
count_bout->str,
totals.active_cons_5s
);
g_string_append_len(html, CONST_STR_LEN(" </table>\n"));
g_string_free(count_req, TRUE);
g_string_free(count_bin, TRUE);
g_string_free(count_bout, TRUE);
}
/* list connections */
{
GString *ts, *bytes_in, *bytes_out, *bytes_in_5s, *bytes_out_5s;
g_string_append_len(html, CONST_STR_LEN("<div class=\"title\"><strong>Active connections</strong></div>\n"));
g_string_append_len(html, html_connections_th, sizeof(html_connections_th)-1);
for (guint i = 0; i < result->len; i++) {
mod_status_wrk_data *sd = g_ptr_array_index(result, i);
for (guint j = 0; j < sd->connections->len; j++) {
mod_status_con_data *cd = &g_array_index(sd->connections, mod_status_con_data, j);
ts = counter_format2((guint64)(CUR_TS(vr->con->wrk) - cd->ts), COUNTER_TIME, -1);
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bytes_in = counter_format2(cd->bytes_in, COUNTER_BYTES, 1);
bytes_in_5s = counter_format2(cd->bytes_in_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_BYTES, 1);
bytes_out = counter_format2(cd->bytes_out, COUNTER_BYTES, 1);
bytes_out_5s = counter_format2(cd->bytes_out_5s_diff / G_GUINT64_CONSTANT(5), COUNTER_BYTES, 1);
g_string_append_printf(html, html_connections_row,
cd->remote_addr_str->str,
connection_state_str(cd->state),
cd->host->str,
cd->path->str,
ts->str,
bytes_in->str,
bytes_out->str,
bytes_in_5s->str,
bytes_out_5s->str
);
g_string_free(cd->remote_addr_str, TRUE);
g_string_free(cd->local_addr_str, TRUE);
g_string_free(cd->host, TRUE);
g_string_free(cd->path, TRUE);
g_string_free(ts, TRUE);
g_string_free(bytes_in, TRUE);
g_string_free(bytes_in_5s, TRUE);
g_string_free(bytes_out, TRUE);
g_string_free(bytes_out_5s, TRUE);
}
g_array_free(sd->connections, TRUE);
}
g_string_append_len(html, CONST_STR_LEN(" </table>\n"));
}
/* free stats */
for (guint i = 0; i < result->len; i++) {
mod_status_wrk_data *sd = g_ptr_array_index(result, i);
g_slice_free(mod_status_wrk_data, sd);
}
g_string_append_len(html, CONST_STR_LEN(
" </body>\n"
"</html>\n"
));
chunkqueue_append_string(vr->con->out, html);
http_header_overwrite(vr->response.headers, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/html"));
g_string_free(tmpstr, TRUE);
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vrequest_handle_direct(vr);
vrequest_joblist_append(vr);
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} else {
/* something went wrong, client may have dropped the connection */
VR_ERROR(vr, "%s", "collect request didn't end up complete");
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vrequest_error(vr);
}
}
static handler_t status_page_handle(vrequest *vr, gpointer param, gpointer *context) {
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UNUSED(param);
if (vr->state == VRS_HANDLE_REQUEST_HEADERS) {
collect_info *ci;
VR_DEBUG(vr, "%s", "collecting stats...");
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/* abuse fdata as pointer to plugin */
ci = collect_start(vr->con->wrk, status_collect_func, param, NULL, status_collect_cb, vr);
*context = ci;
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return HANDLER_WAIT_FOR_EVENT;
}
return HANDLER_GO_ON;
}
static handler_t status_page_cleanup(vrequest *vr, gpointer param, gpointer context) {
collect_info *ci = context;
UNUSED(vr);
UNUSED(param);
collect_break(ci);
return HANDLER_GO_ON;
}
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static action* status_page(server *srv, plugin* p, value *val) {
UNUSED(srv); UNUSED(p); UNUSED(val);
return action_new_function(status_page_handle, status_page_cleanup, NULL, p);
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}
static const plugin_option options[] = {
{ "status.css", VALUE_STRING, NULL, NULL, NULL },
{ NULL, 0, NULL, NULL, NULL }
};
static const plugin_action actions[] = {
{ "status.page", status_page },
{ NULL, NULL }
};
static const plugin_setup setups[] = {
{ NULL, NULL }
};
static void plugin_status_init(server *srv, plugin *p) {
UNUSED(srv);
p->options = options;
p->actions = actions;
p->setups = setups;
}
gboolean mod_status_init(modules *mods, module *mod) {
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UNUSED(mod);
MODULE_VERSION_CHECK(mods);
mod->config = plugin_register(mods->main, "mod_status", plugin_status_init);
return mod->config != NULL;
}
gboolean mod_status_free(modules *mods, module *mod) {
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UNUSED(mods); UNUSED(mod);
if (mod->config)
plugin_free(mods->main, mod->config);
return TRUE;
}