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;; (dot-server-url (server:check-if-running areapath))
(curr-ip (server:get-best-guess-address curr-host))
(curr-pid (current-process-id))
(homehost (common:get-homehost)) ;; configf:lookup *configdat* "server" "homehost" ))
(target-host (car homehost))
(testsuite (common:get-testsuite-name))
(logfile (conc areapath "/logs/server.log")) ;; -" curr-pid "-" target-host ".log"))
(cmdln (conc (common:get-megatest-exe)
" -server " (or target-host "-") (if (equal? (configf:lookup *configdat* "server" "daemonize") "yes")
" -daemonize "
"")
;; " -log " logfile
" -m testsuite:" testsuite)) ;; (conc " >> " logfile " 2>&1 &")))))
(log-rotate (make-thread common:rotate-logs "server run, rotate logs thread"))
(load-limit (configf:lookup-number *configdat* "jobtools" "max-server-start-load" default: 3.0)))
;; we want the remote server to start in *toppath* so push there
(push-directory areapath)
(debug:print 0 *default-log-port* "INFO: Trying to start server (" cmdln ") ...")
(thread-start! log-rotate)
;; host.domain.tld match host?
(if (and target-host
;; look at target host, is it host.domain.tld or ip address and does it
;; match current ip or hostname
(not (string-match (conc "("curr-host "|" curr-host"\\..*)") target-host))
(not (equal? curr-ip target-host)))
(begin
(debug:print-info 0 *default-log-port* "Starting server on " target-host ", logfile is " logfile)
(setenv "TARGETHOST" target-host)))
(setenv "TARGETHOST_LOGF" logfile)
(thread-sleep! (/ (random 5000) 1000)) ;; add about a random (up to 5 seconds) initial delay. It seems pretty common that many running tests request a server at the same time
;; (common:wait-for-normalized-load load-limit " delaying server start due to load" target-host) ;; do not try starting servers on an already overloaded machine, just wait forever
(common:wait-for-homehost-load load-limit (conc " delaying server start due to load on homehost. limit is " load-limit))
(system (conc "nbfake " cmdln))
(unsetenv "TARGETHOST_LOGF")
(if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
(thread-join! log-rotate)
(pop-directory)))
;; given a path to a server log return: host port startseconds
;;
(define (server:logf-get-start-info logf)
(let ((rx (regexp "^SERVER STARTED: (\\S+):(\\d+) AT ([\\d\\.]+)"))) ;; SERVER STARTED: host:port AT timesecs
(handle-exceptions
exn
(list #f #f #f) ;; no idea what went wrong, call it a bad server
(with-input-from-file
logf
(lambda ()
(let loop ((inl (read-line))
(lnum 0))
(if (not (eof-object? inl))
(let ((mlst (string-match rx inl)))
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;; (dot-server-url (server:check-if-running areapath))
(curr-ip (server:get-best-guess-address curr-host))
(curr-pid (current-process-id))
(homehost (common:get-homehost)) ;; configf:lookup *configdat* "server" "homehost" ))
(target-host (car homehost))
(testsuite (common:get-testsuite-name))
(logfile (conc areapath "/logs/server.log")) ;; -" curr-pid "-" target-host ".log"))
(profile-mode (or (configf:lookup *configdat* "misc" "profilesw")
""))
(cmdln (conc (common:get-megatest-exe)
" -server " (or target-host "-") (if (equal? (configf:lookup *configdat* "server" "daemonize") "yes")
" -daemonize "
"")
;; " -log " logfile
" -m testsuite:" testsuite
" " profile-mode
)) ;; (conc " >> " logfile " 2>&1 &")))))
(log-rotate (make-thread common:rotate-logs "server run, rotate logs thread")) ;; why are we rotating logs here? This is a sensitive location with a lot going on!?
(load-limit (configf:lookup-number *configdat* "jobtools" "max-server-start-load" default: 3.0)))
;; we want the remote server to start in *toppath* so push there
(push-directory areapath)
(debug:print 0 *default-log-port* "INFO: Trying to start server (" cmdln ") ...")
(thread-start! log-rotate)
;; host.domain.tld match host?
(if (and target-host
;; look at target host, is it host.domain.tld or ip address and does it
;; match current ip or hostname
(not (string-match (conc "("curr-host "|" curr-host"\\..*)") target-host))
(not (equal? curr-ip target-host)))
(begin
(debug:print-info 0 *default-log-port* "Starting server on " target-host ", logfile is " logfile)
(setenv "TARGETHOST" target-host)))
(setenv "TARGETHOST_LOGF" logfile)
(thread-sleep! (/ (random 5000) 1000)) ;; add about a random (up to 5 seconds) initial delay. It seems pretty common that many running tests request a server at the same time
;; (common:wait-for-normalized-load load-limit " delaying server start due to load" target-host) ;; do not try starting servers on an already overloaded machine, just wait forever
#;(common:wait-for-homehost-load load-limit (conc " delaying server start due to load on homehost. limit is " load-limit))
(system (conc "nbfake " cmdln))
(unsetenv "TARGETHOST_LOGF")
(if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
(thread-join! log-rotate)
(pop-directory)))
;; given a path to a server log return: host port startseconds
;;
(define (server:logf-get-start-info logf)
(let ((rx (regexp "^SERVER STARTED: (\\S+):(\\d+) AT ([\\d\\.]+)"))) ;; SERVER STARTED: host:port AT timesecs
(handle-exceptions
exn
(begin
(print "failed to get server info from " logf ", exn=" exn)
(list #f #f #f)) ;; no idea what went wrong, call it a bad server
(with-input-from-file
logf
(lambda ()
(let loop ((inl (read-line))
(lnum 0))
(if (not (eof-object? inl))
(let ((mlst (string-match rx inl)))
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;; otherwise attempt to create the logs dir and then
;; continue
(if (if (directory-exists? (conc areapath "/logs"))
'()
(if (file-write-access? areapath)
(begin
(condition-case
(create-directory (conc areapath "/logs") #t)
(exn (i/o file)(debug:print 0 *default-log-port* "ERROR: Cannot create directory at " (conc areapath "/logs")))
(exn ()(debug:print 0 *default-log-port* "ERROR: Unknown error attemtping to get server list.")))
(directory-exists? (conc areapath "/logs")))
'()))
(let* ((server-logs (glob (conc areapath "/logs/server-*.log")))
(num-serv-logs (length server-logs)))
(if (null? server-logs)
'()
(let loop ((hed (car server-logs))
(tal (cdr server-logs))
(res '()))
(let* ((mod-time (handle-exceptions
exn
(current-seconds) ;; 0
(file-modification-time hed))) ;; default to *very* old so log gets ignored if deleted
(down-time (- (current-seconds) mod-time))
(serv-dat (if (or (< num-serv-logs 10)
(< down-time 900)) ;; day-seconds))
(server:logf-get-start-info hed)
'())) ;; don't waste time processing server files not touched in the 15 minutes if there are more than ten servers to look at
(serv-rec (cons mod-time serv-dat))
(fmatch (string-match fname-rx hed))
(pid (if fmatch (string->number (list-ref fmatch 2)) #f))
(new-res (if (null? serv-dat)
res
(cons (append serv-rec (list pid)) res))))
(if (null? tal)
(if (and limit
(> (length new-res) limit))
new-res ;; (take new-res limit) <= need intelligent sorting before this will work
new-res)
(loop (car tal)(cdr tal) new-res)))))))))
(define (server:get-num-alive srvlst)
(let ((num-alive 0))
(for-each
(lambda (server)
(match-let (((mod-time host port start-time pid)
server))
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;; otherwise attempt to create the logs dir and then
;; continue
(if (if (directory-exists? (conc areapath "/logs"))
'()
(if (file-write-access? areapath)
(begin
(condition-case
(create-directory (conc areapath "/logs") #t)
(exn (i/o file)(debug:print 0 *default-log-port* "ERROR: Cannot create directory at " (conc areapath "/logs")))
(exn ()(debug:print 0 *default-log-port* "ERROR: Unknown error attemtping to get server list. exn=" exn)))
(directory-exists? (conc areapath "/logs")))
'()))
(let* ((server-logs (glob (conc areapath "/logs/server-*.log")))
(num-serv-logs (length server-logs)))
(if (null? server-logs)
'()
(let loop ((hed (car server-logs))
(tal (cdr server-logs))
(res '()))
(let* ((mod-time (handle-exceptions
exn
(begin
(debug:print 0 *default-log-port* "failed to get modification time on " hed ", exn=" exn)
(current-seconds)) ;; 0
(file-modification-time hed))) ;; default to *very* old so log gets ignored if deleted
(down-time (- (current-seconds) mod-time))
(serv-dat (if (or (< num-serv-logs 10)
(< down-time 900)) ;; day-seconds))
(server:logf-get-start-info hed)
'())) ;; don't waste time processing server files not touched in the 15 minutes if there are more than ten servers to look at
(serv-rec (cons mod-time serv-dat))
(fmatch (string-match fname-rx hed))
(pid (if fmatch (string->number (list-ref fmatch 2)) #f))
(new-res (if (null? serv-dat)
res
(cons (append serv-rec (list pid)) res))))
(if (null? tal)
(if (and limit
(> (length new-res) limit))
new-res ;; (take new-res limit) <= need intelligent sorting before this will work
new-res)
(loop (car tal)(cdr tal) new-res)))))))))
(define (server:get-num-alive srvlst)
(let ((num-alive 0))
(for-each
(lambda (server)
(match-let (((mod-time host port start-time pid)
server))
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(> (length rec) 2))
(let ((start-time (list-ref rec 3))
(mod-time (list-ref rec 0)))
;; (print "start-time: " start-time " mod-time: " mod-time)
(and start-time mod-time
(> (- now start-time) 0) ;; been running at least 0 seconds
(< (- now mod-time) 16) ;; still alive - file touched in last 16 seconds
(< (- now start-time)
(+ (- (string->number (or (configf:lookup *configdat* "server" "runtime") "3600"))
180)
(random 360))) ;; under one hour running time +/- 180
))
#f))
srvlst)
(lambda (a b)
(< (list-ref a 3)
(list-ref b 3))))))
(if (> (length slst) nums)
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(> (length rec) 2))
(let ((start-time (list-ref rec 3))
(mod-time (list-ref rec 0)))
;; (print "start-time: " start-time " mod-time: " mod-time)
(and start-time mod-time
(> (- now start-time) 0) ;; been running at least 0 seconds
(< (- now mod-time) 16) ;; still alive - file touched in last 16 seconds
(or (not (configf:lookup *configdat* "server" "runtime")) ;; skip if not set
(< (- now start-time)
(+ (- (string->number (configf:lookup *configdat* "server" "runtime"))
180)
(random 360)))) ;; under one hour running time +/- 180
))
#f))
srvlst)
(lambda (a b)
(< (list-ref a 3)
(list-ref b 3))))))
(if (> (length slst) nums)
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(define (server:get-client-signature) ;; BB> why is this proc named "get-"? it returns nothing -- set! has not return value.
(if *my-client-signature* *my-client-signature*
(let ((sig (server:mk-signature)))
(set! *my-client-signature* sig)
*my-client-signature*)))
;; kind start up of servers, wait 40 seconds before allowing another server for a given
;; run-id to be launched
(define (server:kind-run areapath)
(if (not (server:check-if-running areapath)) ;; why try if there is already a server running?
(let* ((last-run-dat (hash-table-ref/default *server-kind-run* areapath '(0 0))) ;; callnum, whenrun
(call-num (car last-run-dat))
(when-run (cadr last-run-dat))
(run-delay (+ (case call-num
((0) 0)
((1) 20)
((2) 300)
(else 600))
(random 5))) ;; add a small random number just in case a lot of jobs hit the work hosts simultaneously
(lock-file (conc areapath "/logs/server-start.lock")))
(if (> (- (current-seconds) when-run) run-delay)
(begin
(common:simple-file-lock-and-wait lock-file expire-time: 15)
(server:run areapath)
(thread-sleep! 2) ;; don't release the lock for at least a few seconds
(common:simple-file-release-lock lock-file)))
(hash-table-set! *server-kind-run* areapath (list (+ call-num 1)(current-seconds))))))
(define (server:start-and-wait areapath #!key (timeout 60))
(let ((give-up-time (+ (current-seconds) timeout)))
(let loop ((server-url (server:check-if-running areapath))
(try-num 0))
(if (or server-url
(> (current-seconds) give-up-time)) ;; server-url will be #f if no server available.
server-url
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(define (server:get-client-signature) ;; BB> why is this proc named "get-"? it returns nothing -- set! has not return value.
(if *my-client-signature* *my-client-signature*
(let ((sig (server:mk-signature)))
(set! *my-client-signature* sig)
*my-client-signature*)))
;; wait for server=start-last to be three seconds old
;;
(define (server:wait-for-server-start-last-flag areapath)
(let* ((flag-dir (conc areapath "/logs"))
(start-flag (conc flag-dir "/server-start-last"))
;;; THIS INTERACTS WITH [server] timeout. Suggest using 0.1 or above for timeout (6 seconds)
(reftime (configf:lookup-number *configdat* "server" "idletime" default: 4))
(server-key (conc (get-host-name) "-" (current-process-id)))
(create-key-file (lambda ()
(with-output-to-file start-flag
(lambda ()
(print server-key)))))
(check-key-file (lambda ()
(let ((res (with-input-from-file start-flag
(lambda ()
(read-line)))))
(equal? server-key res))))
(get-file-age (lambda ()
(let* ((fmodtime (file-modification-time start-flag)))
(- (current-seconds) fmodtime)))))
(if (not (directory-exists? flag-dir))
(begin
(debug:print-info 0 *default-log-port* "Directory " flag-dir " does not exist! Cannot gate.")
#f)
(if (file-exists? start-flag)
(if (check-key-file) ;; is it me?
#t ;; yes, it is me, proceed
(let* ((file-age (get-file-age)))
(if (> file-age reftime) ;; let the previous guy have at least 4 seconds to do their thing
(begin ;; file is old enough, we can try to take it
(create-key-file) ;; take the file and try again
(server:wait-for-server-start-last-flag areapath))
(let* ((remtime (max 1 (min file-age reftime))))
(debug:print-info 0 *default-log-port* "Gating server start, waiting remtime="remtime)
(thread-sleep! remtime)
(server:wait-for-server-start-last-flag areapath)))))
(begin
(create-key-file)
(server:wait-for-server-start-last-flag areapath))))))
;; wait for server=start-last to be three seconds old
;;
(define (server:wait-for-server-start-last-flag-old areapath)
(let* ((start-flag (conc areapath "/logs/server-start-last"))
;;; THIS INTERACTS WITH [server] timeout. Suggest using 0.1 or above for timeout (6 seconds)
(reftime (configf:lookup-number *configdat* "server" "idletime" default: 4))
(server-key (conc (get-host-name) "-" (current-process-id)))
(create-key-file (lambda ()
(with-output-to-file start-flag
(lambda ()
(print server-key)))))
(check-key-file (lambda ()
(let ((res (with-input-from-file start-flag
(lambda ()
(read-line)))))
(equal? server-key res)))))
;; (thread-sleep! (/ (random 500) 1000)) ;; I don't think this made a difference
(if (file-exists? start-flag)
(let* ((fmodtime (file-modification-time start-flag))
(delta (- (current-seconds) fmodtime))
(all-go (> delta reftime)))
(if (and all-go
(begin
(create-key-file)
(thread-sleep! 0.25)
(check-key-file)))
#t ;; (system (conc "touch " start-flag)) ;; lazy but safe
(begin
(debug:print-info 0 *default-log-port* "Gating server start, last start: "
fmodtime ", delta: " delta ", reftime: " reftime ", all-go=" all-go)
(thread-sleep! reftime)
(server:wait-for-server-start-last-flag areapath)))))))
;; kind start up of servers, wait 40 seconds before allowing another server for a given
;; run-id to be launched
;;
(define (server:kind-run areapath)
;; look for $MT_RUN_AREA_HOME/logs/server-start-last
;; and wait for it to be at least 3 seconds old
(server:wait-for-server-start-last-flag areapath)
(if (not (server:check-if-running areapath)) ;; why try if there is already a server running?
(let* ((last-run-dat (hash-table-ref/default *server-kind-run* areapath '(0 0))) ;; callnum, whenrun
(call-num (car last-run-dat))
(when-run (cadr last-run-dat))
(run-delay (+ (case call-num
((0) 0)
((1) 20)
((2) 300)
(else 600))
(random 5))) ;; add a small random number just in case a lot of jobs hit the work hosts simultaneously
(lock-file (conc areapath "/logs/server-start.lock")))
(if (> (- (current-seconds) when-run) run-delay)
(let* ((start-flag (conc areapath "/logs/server-start-last")))
(common:simple-file-lock-and-wait lock-file expire-time: 15)
(system (conc "touch " start-flag)) ;; lazy but safe
(server:run areapath)
(thread-sleep! 2) ;; don't release the lock for at least a few seconds
(common:simple-file-release-lock lock-file)))
(hash-table-set! *server-kind-run* areapath (list (+ call-num 1)(current-seconds))))))
;; this one seems to be the general entry point
;;
(define (server:start-and-wait areapath #!key (timeout 60))
(let ((give-up-time (+ (current-seconds) timeout)))
(let loop ((server-url (server:check-if-running areapath))
(try-num 0))
(if (or server-url
(> (current-seconds) give-up-time)) ;; server-url will be #f if no server available.
server-url
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(debug:print 0 *default-log-port* "INFO: syncer thread NOT sleeping ; maybe time-to-exit...")))
(if (not (configf:lookup *configdat* "server" "disable-db-snapshot"))
(common:snapshot-file mtdbfile subdir: ".db-snapshot"))
(delete-file* staging-file)
(let* ((start-time (current-milliseconds))
(res (system sync-cmd))
(res2
(cond
((eq? 0 res)
(delete-file* (conc mtdbfile ".backup"))
(if (eq? 0 (file-size sync-log))
(delete-file sync-log))
(system (conc "/bin/mv " staging-file " " mtdbfile))
(set! last-sync-seconds (/ (- (current-milliseconds) start-time) 1000))
(set! off-time (calculate-off-time
last-sync-seconds
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(debug:print 0 *default-log-port* "INFO: syncer thread NOT sleeping ; maybe time-to-exit...")))
(if (not (configf:lookup *configdat* "server" "disable-db-snapshot"))
(common:snapshot-file mtdbfile subdir: ".db-snapshot"))
(delete-file* staging-file)
(let* ((start-time (current-milliseconds))
(res (system sync-cmd))
(dbbackupfile (conc mtdbfile ".backup"))
(res2
(cond
((eq? 0 res )
(if (file-exists? dbbackupfile)
(delete-file* dbbackupfile)
)
(if (eq? 0 (file-size sync-log))
(delete-file sync-log))
(system (conc "/bin/mv " staging-file " " mtdbfile))
(set! last-sync-seconds (/ (- (current-milliseconds) start-time) 1000))
(set! off-time (calculate-off-time
last-sync-seconds
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(define (server:writable-watchdog-deltasync dbstruct)
(thread-sleep! 0.05) ;; delay for startup
(let ((legacy-sync (common:run-sync?))
(sync-stale-seconds (configf:lookup-number *configdat* "server" "sync-stale-seconds" default: 300))
(debug-mode (debug:debug-mode 1))
(last-time (current-seconds))
(no-sync-db (db:open-no-sync-db))
(sync-duration 0) ;; run time of the sync in milliseconds
;;(this-wd-num (begin (mutex-lock! *wdnum*mutex) (let ((x *wdnum*)) (set! *wdnum* (add1 *wdnum*)) (mutex-unlock! *wdnum*mutex) x)))
)
(set! *no-sync-db* no-sync-db) ;; make the no sync db available to api calls
(debug:print-info 2 *default-log-port* "Periodic sync thread started.")
(debug:print-info 3 *default-log-port* "watchdog starting. legacy-sync is " legacy-sync" pid="(current-process-id) );; " this-wd-num="this-wd-num)
(if (and legacy-sync (not *time-to-exit*))
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(define (server:writable-watchdog-deltasync dbstruct)
(thread-sleep! 0.05) ;; delay for startup
(let ((legacy-sync (common:run-sync?))
(sync-stale-seconds (configf:lookup-number *configdat* "server" "sync-stale-seconds" default: 300))
(debug-mode (debug:debug-mode 1))
(last-time (current-seconds))
(no-sync-db (db:open-no-sync-db))
(stmt-cache (dbr:dbstruct-stmt-cache dbstruct))
(sync-duration 0) ;; run time of the sync in milliseconds
;;(this-wd-num (begin (mutex-lock! *wdnum*mutex) (let ((x *wdnum*)) (set! *wdnum* (add1 *wdnum*)) (mutex-unlock! *wdnum*mutex) x)))
)
(set! *no-sync-db* no-sync-db) ;; make the no sync db available to api calls
(debug:print-info 2 *default-log-port* "Periodic sync thread started.")
(debug:print-info 3 *default-log-port* "watchdog starting. legacy-sync is " legacy-sync" pid="(current-process-id) );; " this-wd-num="this-wd-num)
(if (and legacy-sync (not *time-to-exit*))
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(if (and (not *time-to-exit*)
(< count 6)) ;; was 11, changing to 4.
(begin
(thread-sleep! 1)
(delay-loop (+ count 1))))
(if (not *time-to-exit*) (loop))))
;; time to exit, close the no-sync db here
(db:no-sync-close-db no-sync-db)
(if (common:low-noise-print 30)
(debug:print-info 0 *default-log-port* "Exiting watchdog timer, *time-to-exit* = " *time-to-exit*" pid="(current-process-id) ))))))) ;;" this-wd-num="this-wd-num)))))))
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(if (and (not *time-to-exit*)
(< count 6)) ;; was 11, changing to 4.
(begin
(thread-sleep! 1)
(delay-loop (+ count 1))))
(if (not *time-to-exit*) (loop))))
;; time to exit, close the no-sync db here
(db:no-sync-close-db no-sync-db stmt-cache)
(if (common:low-noise-print 30)
(debug:print-info 0 *default-log-port* "Exiting watchdog timer, *time-to-exit* = " *time-to-exit*" pid="(current-process-id) ))))))) ;;" this-wd-num="this-wd-num)))))))
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