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(define (server:mk-signature)
(message-digest-string (md5-primitive)
(with-output-to-string
(lambda ()
(write (list (current-directory)
(current-process-id)
(argv)))))))
(define (server:get-client-signature)
(if *my-client-signature* *my-client-signature*
(let ((sig (server:mk-signature))) ;; clients re-use the server:mk-signature logic
(set! *my-client-signature* sig)
*my-client-signature*)))
(define (server:get-server-id)
(if *server-id* *server-id*
(let ((sig (server:mk-signature))) ;; clients re-use the server:mk-signature logic
(set! *server-id* sig)
*server-id*)))
;; When using zmq this would send the message back (two step process)
;; with spiffy or rpc this simply returns the return data to be returned
;;
(define (server:reply return-addr query-sig success/fail result)
(debug:print-info 11 *default-log-port* "server:reply return-addr=" return-addr ", result=" result)
;; (send-message pubsock target send-more: #t)
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;; Given an area path, start a server process ### NOTE ### > file 2>&1
;; if the target-host is set
;; try running on that host
;; incidental: rotate logs in logs/ dir.
;;
(define (server:run areapath) ;; areapath is *toppath* for a given testsuite area
(let* ((curr-host (get-host-name))
(let* (;; (curr-host (get-host-name))
;; (attempt-in-progress (server:start-attempted? areapath))
;; (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))
;; (curr-ip (server:get-best-guess-address curr-host))
;; (curr-pid (current-process-id))
;; (homehost (server: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 "-")
" -server " (or target-host "-") (if (equal? (configf:lookup *configdat* "server" "daemonize") "yes")
" -daemonize "
"")
(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)))
;; (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 3000) 1000)) ;; add a random initial delay. It seems pretty common that many running tests request a server at the same time
(debug:print 0 *default-log-port* "INFO: starting server at " (common:human-time))
(system (conc "nbfake " cmdln))
(unsetenv "TARGETHOST_LOGF")
(if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
;; (if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
(thread-join! log-rotate)
(pop-directory)))
;; given a path to a server log return: host port startseconds server-id
;; any changes to number of elements returned by this fuction will dirctly affect server:record->url,server:record->id,server:kill,server:get-num-alive which use match let
;; example of what it's looking for in the log file:
;; SERVER STARTED: 10.38.175.67:50216 AT 1616502350.0 server-id: 4907e90fc55c7a09694e3f658c639cf4
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(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 (string-chomp (car tal)) (cdr tal) new-res)))))))))
(define (server:get-num-alive srvlst)
#;(define (server:get-num-alive srvlst)
(let ((num-alive 0))
(for-each
(lambda (server)
(handle-exceptions
exn
(begin
(debug:print-info 0 *default-log-port* "Unable to get server start-time and/or mod-time from " server ", exn=" exn))
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(lambda (a b)
(< (list-ref a 3)
(list-ref b 3))))))
(if (> (length slst) nums)
(take slst nums)
slst)))
;; ;; switch from server:get-list to server:get-servers-info
;; ;;
(define (server:get-first-best areapath)
(let ((srvrs (server:get-best (server:get-list areapath))))
(if (and srvrs
(not (null? srvrs)))
(car srvrs)
#f)))
(define (server:get-rand-best areapath)
(let ((srvrs (server:get-best (server:get-list areapath))))
(if (and (list? srvrs)
(not (null? srvrs)))
(let* ((len (length srvrs))
(idx (random len)))
(list-ref srvrs idx))
#f)))
;; (define (server:get-first-best areapath)
;; (let ((srvrs (server:get-best (server:get-list areapath))))
;; (if (and srvrs
;; (not (null? srvrs)))
;; (car srvrs)
;; #f)))
;;
;; (define (server:get-rand-best areapath)
;; (let ((srvrs (server:get-best (server:get-list areapath))))
;; (if (and (list? srvrs)
;; (not (null? srvrs)))
;; (let* ((len (length srvrs))
;; (idx (random len)))
;; (list-ref srvrs idx))
;; #f)))
(define (server:record->id servr)
(handle-exceptions
exn
(begin
(debug:print-info 0 *default-log-port* "Unable to get server id from " servr ", exn=" exn)
#f)
(match-let (((mod-time host port start-time server-id pid)
(match-let (((host port start-time server-id)
servr))
(if server-id
server-id
#f))))
(define (server:record->url servr)
(handle-exceptions
exn
(begin
(debug:print-info 0 *default-log-port* "Unable to get server url from " servr ", exn=" exn)
#f)
(match-let (((mod-time host port start-time server-id pid)
(match-let (((host port start-time server-id)
servr))
(if (and host port)
(conc host ":" port)
#f))))
(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*)))
(define (server:wait-for-server-start-last-flag areapath)
#;(define (server:wait-for-server-start-last-flag 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)
(idletime (configf:lookup-number *configdat* "server" "idletime" default: 4))
(server-key (conc (get-host-name) "-" (current-process-id))))
(if (file-exists? start-flag)
(let* ((fmodtime (file-modification-time start-flag))
(delta (- (current-seconds) fmodtime))
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(begin
(debug:print-info 0 *default-log-port* "Gating server start, last start: "
(seconds->time-string fmodtime) ", time since last start: " delta ", required idletime: " idletime ", gating reason:" (if old-enough "another job started a server" "too soon to start another server"))
(thread-sleep! ( + 1 idletime))
(server:wait-for-server-start-last-flag areapath)))))))
;; oldest server alive determines host then choose random of youngest
;; five servers on that host
;;
(define (server:get-servers-info areapath)
(let* ((servinfodir (conc *toppath*"/.servinfo")))
(if (not (file-exists? servinfodir))
(create-directory servinfodir))
(let* ((allfiles (glob (conc servinfodir"/*")))
(res (make-hash-table)))
(for-each
(lambda (f)
(let* ((hostport (pathname-strip-directory f))
(serverdat (server:logf-get-start-info f)))
(hash-table-set! res hostport serverdat)))
allfiles)
res)))
;; oldest server alive determines host then choose random of youngest
;; five servers on that host
;;
;; mode:
;; best - get best server (random of newest five)
;; home - get home host based on oldest server
;; info - print info
(define (server:choose-server areapath #!optional (mode 'best))
;; age is current-starttime
;; find oldest alive
;; 1. sort by age ascending and ping until good
;; find alive rand from youngest
;; 1. sort by age descending
;; 2. take five
;; 3. check alive, discard if not and repeat
(let* ((serversdat (server:get-servers-info areapath))
(servkeys (hash-table-keys serversdat))
(by-time-asc (if (not (null? servkeys))
(sort servkeys ;; list of "host:port"
(lambda (a b)
(>= (list-ref (hash-table-ref serversdat a) 2)
(list-ref (hash-table-ref serversdat b) 2))))
'())))
(if (not (null? by-time-asc))
(let* ((oldest (last by-time-asc))
(oldest-dat (hash-table-ref serversdat oldest))
(host (list-ref oldest-dat 0))
(all-valid (filter (lambda (x)
(equal? host (list-ref (hash-table-ref serversdat x) 0)))
by-time-asc))
(best-five (lambda ()
(if (> (length all-valid) 5)
(map (lambda (x)
(hash-table-ref serversdat x))
(take all-valid 5))
all-valid)))
(names->dats (lambda (names)
(map (lambda (x)(hash-table-ref serversdat x)) names)))
(am-home? (lambda ()
(let* ((currhost (get-host-name))
(bestadrs (server:get-best-guess-address currhost)))
(or (equal? host currhost)
(equal? host bestadrs))))))
(case mode
((info)
(print "oldest: "oldest-dat", selected host: "host", all-valid: "all-valid)
(print "youngest: "(hash-table-ref serversdat (car all-valid))))
((home) host)
((homehost) (cons host (am-home?))) ;; shut up old code
((home?) (am-home?))
((best-five)(names->dats (best-five)))
((all-valid)(names->dats all-valid))
((best) (let* ((best-five (best-five))
(len (length best-five)))
(list-ref best-five (random len))))
(server:wait-for-server-start-last-flag areapath)
(if (not (server:check-if-running areapath)) ;; why try if there is already a server running?
;; (server:wait-for-server-start-last-flag areapath)
(server:run areapath)
#;(if (not (server:check-if-running areapath)) ;; why try if there is already a server running?
(let* ((lock-file (conc areapath "/logs/server-start.lock")))
(let* ((start-flag (conc areapath "/logs/server-start-last")))
(common:simple-file-lock-and-wait lock-file expire-time: 25)
(debug:print-info 2 *default-log-port* "server:kind-run: touching " start-flag)
(system (conc "touch " start-flag)) ;; lazy but safe
(server:run areapath)
(thread-sleep! 20) ;; don't release the lock for at least a few seconds. And allow time for the server startup to get to "SERVER STARTED".
(common:simple-file-release-lock lock-file)))
(debug:print-info 0 *default-log-port* "Found server already running. NOT trying to start another.")))
;; 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-info (server:check-if-running areapath))
(try-num 0))
(if (or server-info
(> (current-seconds) give-up-time)) ;; server-url will be #f if no server available.
(server:record->url server-info)
(let ((num-ok (length (server:get-best (server:get-list areapath)))))
(let ((num-ok (length (server:choose-server areapath 'all-valid))))
(if (and (> try-num 0) ;; first time through simply wait a little while then try again
(< num-ok 1)) ;; if there are no decent candidates for servers then try starting a new one
(server:kind-run areapath))
(server:run areapath))
(thread-sleep! 5)
(loop (server:check-if-running areapath)
(+ try-num 1)))))))
(define server:try-running server:run) ;; there is no more per-run servers ;; REMOVE ME. BUG.
(servers (server:get-best (server:get-list areapath))))
(servers (server:choose-server areapath 'best-five))) ;; (server:get-best (server:get-list areapath))))
(if (or (and servers
(null? servers))
(not servers)
(and (list? servers)
(< (length servers) (+ 1 (random ns))))) ;; somewhere between 1 and numservers
(not servers))
;; (and (list? servers)
;; (< (length servers) (+ 1 (random ns))))) ;; somewhere between 1 and numservers
#f
(let loop ((hed (car servers))
(tal (cdr servers)))
(let ((res (server:check-server hed)))
(if res
hed
(if (null? tal)
#f
(loop (car tal)(cdr tal)))))))))
;; ping the given server
;;
(define (server:check-server server-record)
(let* ((server-url (server:record->url server-record))
(server-id (server:record->id server-record))
(server-id (server:record->id server-record))
(res (case *transport-type*
((http)(server:ping server-url server-id))
;; ((nmsg)(nmsg-transport:ping (tasks:hostinfo-get-interface server)
)))
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