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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <stdint.h>
#include <ap_config.h>
#include "ap_mpm.h"
#include <http_core.h>
#include <httpd.h>
#include <http_log.h>
#include <apr_version.h>
#include <apr_pools.h>
#include <apr_strings.h>
#include "unixd.h"
#include "scoreboard.h"
#include "mpm_common.h"
#include "systemd/sd-daemon.h"
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
APR_DECLARE_OPTIONAL_FN(int,
ap_find_systemd_socket, (process_rec *, apr_port_t));
APR_DECLARE_OPTIONAL_FN(int,
ap_systemd_listen_fds, (int));
static int systemd_pre_config(apr_pool_t *pconf, apr_pool_t *plog,
apr_pool_t *ptemp)
{
sd_notify(0,
"RELOADING=1\n"
"STATUS=Reading configuration...\n");
ap_extended_status = 1;
return OK;
}
/* Report the service is ready in post_config, which could be during
* startup or after a reload. The server could still hit a fatal
* startup error after this point during ap_run_mpm(), so this is
* perhaps too early, but by post_config listen() has been called on
* the TCP ports so new connections will not be rejected. There will
* always be a possible async failure event simultaneous to the
* service reporting "ready", so this should be good enough. */
static int systemd_post_config(apr_pool_t *p, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *main_server)
{
sd_notify(0, "READY=1\n"
"STATUS=Configuration loaded.\n");
return OK;
}
static int systemd_pre_mpm(apr_pool_t *p, ap_scoreboard_e sb_type)
{
sd_notifyf(0, "READY=1\n"
"STATUS=Processing requests...\n"
"MAINPID=%" APR_PID_T_FMT, getpid());
return OK;
}
static int systemd_monitor(apr_pool_t *p, server_rec *s)
{
ap_sload_t sload;
apr_interval_time_t up_time;
char bps[5];
if (!ap_extended_status) {
/* Nothing useful to report with ExtendedStatus disabled. */
return DECLINED;
}
ap_get_sload(&sload);
/* up_time in seconds */
up_time = (apr_uint32_t) apr_time_sec(apr_time_now() -
ap_scoreboard_image->global->restart_time);
apr_strfsize((unsigned long)((float) (sload.bytes_served)
/ (float) up_time), bps);
sd_notifyf(0, "READY=1\n"
"STATUS=Total requests: %lu; Idle/Busy workers %d/%d;"
"Requests/sec: %.3g; Bytes served/sec: %sB/sec\n",
sload.access_count, sload.idle, sload.busy,
((float) sload.access_count) / (float) up_time, bps);
return DECLINED;
}
static int ap_find_systemd_socket(process_rec * process, apr_port_t port) {
int fdcount, fd;
int sdc = sd_listen_fds(0);
if (sdc < 0) {
ap_log_perror(APLOG_MARK, APLOG_CRIT, sdc, process->pool, APLOGNO(02486)
"find_systemd_socket: Error parsing enviroment, sd_listen_fds returned %d",
sdc);
return -1;
}
if (sdc == 0) {
ap_log_perror(APLOG_MARK, APLOG_CRIT, sdc, process->pool, APLOGNO(02487)
"find_systemd_socket: At least one socket must be set.");
return -1;
}
fdcount = atoi(getenv("LISTEN_FDS"));
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + fdcount; fd++) {
if (sd_is_socket_inet(fd, 0, 0, -1, port) > 0) {
return fd;
}
}
return -1;
}
static int ap_systemd_listen_fds(int unset_environment){
return sd_listen_fds(unset_environment);
}
static void systemd_register_hooks(apr_pool_t *p)
{
APR_REGISTER_OPTIONAL_FN(ap_systemd_listen_fds);
APR_REGISTER_OPTIONAL_FN(ap_find_systemd_socket);
/* Enable ap_extended_status. */
ap_hook_pre_config(systemd_pre_config, NULL, NULL, APR_HOOK_LAST);
/* Signal service is ready. */
ap_hook_post_config(systemd_post_config, NULL, NULL, APR_HOOK_REALLY_LAST);
/* We know the PID in this hook ... */
ap_hook_pre_mpm(systemd_pre_mpm, NULL, NULL, APR_HOOK_LAST);
/* Used to update httpd's status line using sd_notifyf */
ap_hook_monitor(systemd_monitor, NULL, NULL, APR_HOOK_MIDDLE);
}
AP_DECLARE_MODULE(systemd) = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
systemd_register_hooks,
};
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