1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
--- httpd-2.4.3/modules/arch/unix/config5.m4.systemd
+++ httpd-2.4.3/modules/arch/unix/config5.m4
@@ -18,6 +18,19 @@ APACHE_MODULE(privileges, Per-virtualhos
fi
])
+
+APACHE_MODULE(systemd, Systemd support, , , $unixd_mods_enabled, [
+ AC_CHECK_LIB(systemd-daemon, sd_notify, SYSTEMD_LIBS="-lsystemd-daemon")
+ AC_CHECK_HEADERS(systemd/sd-daemon.h, [ap_HAVE_SD_DAEMON_H="yes"], [ap_HAVE_SD_DAEMON_H="no"])
+ if test $ap_HAVE_SD_DAEMON_H = "no" || test -z "${SYSTEMD_LIBS}"; then
+ AC_MSG_WARN([Your system does not support systemd.])
+ enable_systemd="no"
+ else
+ APR_ADDTO(MOD_SYSTEMD_LDADD, [$SYSTEMD_LIBS])
+ enable_systemd="yes"
+ fi
+])
+
APR_ADDTO(INCLUDES, [-I\$(top_srcdir)/$modpath_current])
APACHE_MODPATH_FINISH
--- httpd-2.4.3/modules/arch/unix/mod_systemd.c.systemd
+++ httpd-2.4.3/modules/arch/unix/mod_systemd.c
@@ -0,0 +1,138 @@
+/* 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 <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
+
+#define KBYTE 1024
+
+static pid_t pid; /* PID of the main httpd instance */
+static int server_limit, thread_limit, threads_per_child, max_servers;
+static time_t last_update_time;
+static unsigned long last_update_access;
+static unsigned long last_update_kbytes;
+
+static int systemd_pre_mpm(apr_pool_t *p, ap_scoreboard_e sb_type)
+{
+ int rv;
+ last_update_time = time(0);
+
+ ap_mpm_query(AP_MPMQ_HARD_LIMIT_THREADS, &thread_limit);
+ ap_mpm_query(AP_MPMQ_HARD_LIMIT_DAEMONS, &server_limit);
+ ap_mpm_query(AP_MPMQ_MAX_THREADS, &threads_per_child);
+ /* work around buggy MPMs */
+ if (threads_per_child == 0)
+ threads_per_child = 1;
+ ap_mpm_query(AP_MPMQ_MAX_DAEMONS, &max_servers);
+
+ pid = getpid();
+
+ rv = sd_notifyf(0, "READY=1\n"
+ "STATUS=Processing requests...\n"
+ "MAINPID=%lu",
+ (unsigned long) pid);
+ if (rv < 0) {
+ ap_log_perror(APLOG_MARK, APLOG_ERR, 0, p,
+ "sd_notifyf returned an error %d", rv);
+ }
+
+ return OK;
+}
+
+static int systemd_monitor(apr_pool_t *p, server_rec *s)
+{
+ int i, j, res, rv;
+ process_score *ps_record;
+ worker_score *ws_record;
+ unsigned long access = 0;
+ unsigned long bytes = 0;
+ unsigned long kbytes = 0;
+ char bps[5];
+ time_t now = time(0);
+ time_t elapsed = now - last_update_time;
+
+ for (i = 0; i < server_limit; ++i) {
+ ps_record = ap_get_scoreboard_process(i);
+ for (j = 0; j < thread_limit; ++j) {
+ ws_record = ap_get_scoreboard_worker_from_indexes(i, j);
+ if (ap_extended_status && !ps_record->quiescing && ps_record->pid) {
+ res = ws_record->status;
+ if (ws_record->access_count != 0 ||
+ (res != SERVER_READY && res != SERVER_DEAD)) {
+ access += ws_record->access_count;
+ bytes += ws_record->bytes_served;
+ if (bytes >= KBYTE) {
+ kbytes += (bytes >> 10);
+ bytes = bytes & 0x3ff;
+ }
+ }
+ }
+ }
+ }
+
+ apr_strfsize((unsigned long)(KBYTE *(float) (kbytes - last_update_kbytes)
+ / (float) elapsed), bps);
+
+ rv = sd_notifyf(0, "READY=1\n"
+ "STATUS=Total requests: %lu; Current requests/sec: %.3g; "
+ "Current traffic: %sB/sec\n", access,
+ ((float)access - last_update_access) / (float) elapsed, bps);
+ if (rv < 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00000)
+ "sd_notifyf returned an error %d", rv);
+ }
+
+ last_update_access = access;
+ last_update_kbytes = kbytes;
+ last_update_time = now;
+
+ 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);
+}
+
+module AP_MODULE_DECLARE_DATA systemd_module =
+{
+ STANDARD20_MODULE_STUFF,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ systemd_register_hooks,
+};
|
