| /* 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 |
| |
| static int shutdown_timer = 0; |
| static int shutdown_counter = 0; |
| static unsigned long bytes_served; |
| static pid_t mainpid; |
| |
| static int systemd_pre_mpm(apr_pool_t *p, ap_scoreboard_e sb_type) |
| { |
| int rv; |
| |
| ap_extended_status = 1; |
| mainpid = getpid(); |
| |
| rv = sd_notifyf(0, "READY=1\n" |
| "STATUS=Processing requests...\n" |
| "MAINPID=%" APR_PID_T_FMT, mainpid); |
| if (rv < 0) { |
| ap_log_perror(APLOG_MARK, APLOG_ERR, 0, p, APLOGNO(02395) |
| "sd_notifyf returned an error %d", rv); |
| } |
| |
| 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]; |
| int rv; |
| |
| 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); |
| |
| rv = 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); |
| |
| if (rv < 0) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02396) |
| "sd_notifyf returned an error %d", rv); |
| } |
| |
| /* Shutdown httpd when nothing is sent for shutdown_timer seconds. */ |
| if (sload.bytes_served == bytes_served) { |
| /* mpm_common.c: INTERVAL_OF_WRITABLE_PROBES is 10 */ |
| shutdown_counter += 10; |
| if (shutdown_timer > 0 && shutdown_counter >= shutdown_timer) { |
| rv = sd_notifyf(0, "READY=1\n" |
| "STATUS=Stopped as result of IdleShutdown " |
| "timeout."); |
| if (rv < 0) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02804) |
| "sd_notifyf returned an error %d", rv); |
| } |
| kill(mainpid, AP_SIG_GRACEFUL); |
| } |
| } |
| else { |
| shutdown_counter = 0; |
| } |
| |
| bytes_served = sload.bytes_served; |
| |
| return DECLINED; |
| } |
| |
| static void systemd_register_hooks(apr_pool_t *p) |
| { |
| /* 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); |
| } |
| |
| static const char *set_shutdown_timer(cmd_parms *cmd, void *dummy, |
| const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| shutdown_timer = atoi(arg); |
| return NULL; |
| } |
| |
| static const command_rec systemd_cmds[] = |
| { |
| AP_INIT_TAKE1("IdleShutdown", set_shutdown_timer, NULL, RSRC_CONF, |
| "Number of seconds in idle-state after which httpd is shutdown"), |
| {NULL} |
| }; |
| |
| AP_DECLARE_MODULE(systemd) = { |
| STANDARD20_MODULE_STUFF, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| systemd_cmds, |
| systemd_register_hooks, |
| }; |