Overview
Comment: | wip |
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Timelines: | family | ancestors | descendants | both | v1.80-servload |
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SHA1: |
c36bcea34e0a9e91ad1fce256f8b7bcc |
User & Date: | matt on 2023-04-26 02:08:57 |
Other Links: | branch diff | manifest | tags |
Context
2023-04-26
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02:18 | Added back old nmsg-transport.scm check-in: 0b5556b83e user: matt tags: v1.80-servload | |
02:08 | wip check-in: c36bcea34e user: matt tags: v1.80-servload | |
2023-04-24
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15:21 | Merged fork check-in: 53dba4ce04 user: mrwellan tags: v1.80-servload | |
Changes
Added nn-transport.scm version [96f84cfada].
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 | ;;start a server, returns the connection ;; (define (start-nn-server portnum ) (let ((rep (nn-socket 'rep))) (handle-exceptions exn (let ((emsg ((condition-property-accessor 'exn 'message) exn))) (print "ERROR: Failed to start server \"" emsg "\"") (exit 1)) (nn-bind rep (conc "tcp://*:" portnum))) rep)) ;; open connection to server, send message, close connection ;; (define (open-send-close-nn host-port msg attrib #!key (timeout 3) ) ;; default timeout is 3 seconds (let ((req (nn-socket 'req)) (uri (conc "tcp://" host-port)) (res #f) (contacts (alist-ref 'contact attrib)) (mode (alist-ref 'mode attrib))) (handle-exceptions exn (let ((emsg ((condition-property-accessor 'exn 'message) exn))) ;; Send notification (print "ERROR: Failed to connect / send to " uri " message was \"" emsg "\"" ) (if (equal? mode "production") (begin (print " Sending email to contacts : " contacts ) (let ((email-body (mtut:stml->string (s:body (s:p (conc "We could not send messages to the server on " uri "." "Please check if the listner is running. It is possible that the host is overloaded due to which it may take too long to respond. \n Contact your system adminstrator if server load is high." (s:br)" Thank You ") ))))) (sendmail (string-join (string-split contacts ";" )) (conc "[Listner Error] Filed to connect to listner on " uri) email-body use_html: #t))) (print " mode : " mode " Not sending any emails" )) #f) (nn-connect req uri) (print "Connected to the server " ) (nn-send req msg) (print "Request Sent") (let* ((th1 (make-thread (lambda () (let ((resp (nn-recv req))) (nn-close req) (set! res (if (equal? resp "ok") #t #f)))) "recv thread")) (th2 (make-thread (lambda () (thread-sleep! timeout) (thread-terminate! th1)) "timer thread"))) (thread-start! th1) (thread-start! th2) (thread-join! th1) res)))) (define (open-send-receive-nn host-port msg attrib #!key (timeout 3) ) ;; default timeout is 3 seconds (let ((req (nn-socket 'req)) (uri (conc "tcp://" host-port)) (res #f) (contacts (alist-ref 'contact attrib)) (mode (alist-ref 'mode attrib))) (handle-exceptions exn (let ((emsg ((condition-property-accessor 'exn 'message) exn))) ;; Send notification (print "ERROR: Failed to connect / send to " uri " message was \"" emsg "\"" ) (if (equal? mode "production") (begin (print " Sending email to contacts : " contacts ) (let ((email-body (mtut:stml->string (s:body (s:p (conc "We could not send messages to the server on " uri "." "Please check if the listner is running. It is possible that the host is overloaded due to which it may take too long to respond. \n Contact your system adminstrator if server load is high." (s:br)" Thank You ") ))))) (sendmail (string-join (string-split contacts ";" )) (conc "[Listner Error] Filed to connect to listner on " uri) email-body use_html: #t))) (print " mode : " mode " Not sending any emails" )) #f) (nn-connect req uri) (print "Connected to the server " ) (nn-send req msg) (print "Request Sent") ;; receive code here ;;(print (nn-recv req)) (let* ((th1 (make-thread (lambda () (let ((resp (nn-recv req))) (nn-close req) (print resp) (set! res (if (equal? resp "ok") #t #f)))) "recv thread")) (th2 (make-thread (lambda () (thread-sleep! timeout) (thread-terminate! th1)) "timer thread"))) (thread-start! th1) (thread-start! th2) (thread-join! th1) res)))) ((tsend) (if (null? remargs) (print "ERROR: missing data to send to trigger listeners") (let* ((msg (car remargs)) (mtconfdat (simple-setup (args:get-arg "-start-dir"))) (mtconf (car mtconfdat)) (time-out (if (args:get-arg "-time-out") (string->number (args:get-arg "-time-out")) 5)) (listeners (configf:get-section mtconf "listeners")) (user-info (user-information (current-user-id))) (prev-seen (make-hash-table))) ;; catch duplicates (if user-info (begin (for-each (lambda (listener) (let ((host-port (car listener)) (attrib (val->alist (cadr listener)))) (if (and (equal? msg "time-to-die") (not (can-user-kill-listner user-info attrib))) (begin (debug:print-error 0 *default-log-port* "User " (car user-info) " is not allowed to send message '" msg"'") (exit 1))) (print "sending " msg " to " host-port ) (open-send-close-nn host-port msg attrib timeout: time-out ))) listeners)) (begin (debug:print-error 0 *default-log-port* "Could not Identify executing user. Will not send any message") (exit 1)))))) ((tquery) (if (null? remargs) (print "ERROR: missing data to send to trigger listeners") (let* ((msg (car remargs)) (mtconfdat (simple-setup (args:get-arg "-start-dir"))) (mtconf (car mtconfdat)) (time-out (if (args:get-arg "-time-out") (string->number (args:get-arg "-time-out")) 5)) (listeners (configf:get-section mtconf "listeners")) (user-info (user-information (current-user-id))) (prev-seen (make-hash-table))) ;; catch duplicates (if user-info (begin (for-each (lambda (listener) (let ((host-port (car listener)) (attrib (val->alist (cadr listener)))) (if (and (equal? msg "time-to-die") (not (can-user-kill-listner user-info attrib))) (begin (debug:print-error 0 *default-log-port* "User " (car user-info) " is not allowed to send message '" msg"'") (exit 1))) (print "sending " msg " to " host-port ) (open-send-receive-nn host-port msg attrib timeout: time-out ))) listeners)) (begin (debug:print-error 0 *default-log-port* "Could not Identify executing user. Will not send any message") (exit 1)))))) ((tquerylisten) (if (null? remargs) (print "ERROR: useage for tlisten is \"mtutil tlisten portnum\"") (let ((portnum (string->number (car remargs)))) (if (not portnum) (print "ERROR: the portnumber parameter must be a number, you gave: " (car remargs)) (begin (if (not (is-port-in-use portnum)) (let* ((rep (start-nn-server portnum)) (mtconfdat (simple-setup (args:get-arg "-start-dir"))) (mtconf (car mtconfdat)) (contact (configf:lookup mtconf "listener" "owner")) (script (configf:lookup mtconf "listener" "script"))) (print "Listening on port " portnum " for messages.") (set-signal-handler! signal/int (lambda (signum) (set! *time-to-exit* #t) (debug:print-error 0 *default-log-port* "Received signal " signum " sending email befor exiting !!") (let ((email-body (mtut:stml->string (s:body (s:p (conc "Received signal " signum ". Lister has been terminated on host " (get-environment-variable "HOST") ". ")))))) (sendmail contact "Listner has been terminated." email-body use_html: #t)) (exit))) (set-signal-handler! signal/term (lambda (signum) (set! *time-to-exit* #t) (debug:print-error 0 *default-log-port* "Received signal " signum " sending email befor exiting !!") (let ((email-body (mtut:stml->string (s:body (s:p (conc "Received signal " signum ". Lister has been terminated on host " (get-environment-variable "HOST") ". ")))))) (sendmail contact "Listner has been terminated." email-body use_html: #t)) (exit))) ;(set-signal-handler! signal/term special-signal-handler) (let loop ((instr (nn-recv rep))) ;;(nn-send rep "3.9") (with-input-from-pipe (conc "/usr/bin/uptime | cut -d':' -f4 | awk '{print $1}' | cut -d',' -f1") (lambda() (let loop ((inl (read-line))) (if (not (eof-object? inl)) (begin ;;(print "fdk73: " inl ":") ;;(set! current-list-ciaf (append! current-list-ciaf (list (string-substitute "\\s+$" "" inl)))) (nn-send rep inl) (loop(read-line))) )) ) ) ;;(print (isys "/usr/bin/uptime" foreach-stdout-thunk: foreach-stdout)) (let ((ctime (date->string (current-date)))) (if (equal? instr "time-to-die") (begin (debug:print 0 *default-log-port* ctime " received '" instr "'. Time to sucide." ) (let ((pid (current-process-id))) (debug:print 0 *default-log-port* "Killing current process (pid=" pid ")") (system (conc "kill " pid)))) (begin (debug:print 0 *default-log-port* ctime " received " instr ) ;(nn-send rep "ok") (if (not (equal? instr "ping")) (begin (debug:print 0 *default-log-port* ctime " running \"" script " " instr "\"") ;(system (conc script " '" instr "'")) (process-run script (list instr )) (debug:print 0 *default-log-port* ctime " done" )) (begin (if (not (equal? instr "load")) (print "Checking load") ) ) ) ))) (loop (nn-recv rep)))) (print "ERROR: Port " portnum " already in use. Try another port"))))))) ((tlisten) (if (null? remargs) (print "ERROR: useage for tlisten is \"mtutil tlisten portnum\"") (let ((portnum (string->number (car remargs)))) (if (not portnum) (print "ERROR: the portnumber parameter must be a number, you gave: " (car remargs)) (begin (if (not (is-port-in-use portnum)) (let* ((rep (start-nn-server portnum)) (mtconfdat (simple-setup (args:get-arg "-start-dir"))) (mtconf (car mtconfdat)) (contact (configf:lookup mtconf "listener" "owner")) (script (configf:lookup mtconf "listener" "script"))) (print "Listening on port " portnum " for messages.") (set-signal-handler! signal/int (lambda (signum) (set! *time-to-exit* #t) (debug:print-error 0 *default-log-port* "Received signal " signum " sending email befor exiting !!") (let ((email-body (mtut:stml->string (s:body (s:p (conc "Received signal " signum ". Lister has been terminated on host " (get-environment-variable "HOST") ". ")))))) (sendmail contact "Listner has been terminated." email-body use_html: #t)) (exit))) (set-signal-handler! signal/term (lambda (signum) (set! *time-to-exit* #t) (debug:print-error 0 *default-log-port* "Received signal " signum " sending email befor exiting !!") (let ((email-body (mtut:stml->string (s:body (s:p (conc "Received signal " signum ". Lister has been terminated on host " (get-environment-variable "HOST") ". ")))))) (sendmail contact "Listner has been terminated." email-body use_html: #t)) (exit))) ;; (set-signal-handler! signal/term special-signal-handler) (let loop ((instr (nn-recv rep))) (nn-send rep "ok") (let ((ctime (date->string (current-date)))) (if (equal? instr "time-to-die") (begin (debug:print 0 *default-log-port* ctime " received '" instr "'. Time to sucide." ) (let ((pid (current-process-id))) (debug:print 0 *default-log-port* "Killing current process (pid=" pid ")") (system (conc "kill " pid)))) (begin (debug:print 0 *default-log-port* ctime " received " instr ) ;(nn-send rep "ok") (if (not (equal? instr "ping")) (begin (debug:print 0 *default-log-port* ctime " running \"" script " " instr "\"") (system (conc script " '" instr "' &")) ;(process-run script (list instr )) (debug:print 0 *default-log-port* ctime " done" )) (begin (if (not (equal? instr "load")) (print "Checking load") ) ) ) ))) (loop (nn-recv rep)))) (print "ERROR: Port " portnum " already in use. Try another port"))))))) ;; from bard (define (start-nanomsg-server) (let* ((socket (socket-connect "inproc://my-server"))) (begin (set-socket-option socket 'linger 1) (set-socket-option socket 'sndbuf 1024) (set-socket-option socket 'rcvbuf 1024) (loop (let ((msg (receive-message socket))) (if msg (handle-message msg) (exit)))))) |