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(declare (uses portlogger))
(use address-info tcp)
(module tcp-transportmod
*
(import scheme
(prefix sqlite3 sqlite3:)
address-info
extras
files
hostinfo
ports
posix
tcp
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(declare (uses portlogger))
(use address-info tcp)
(module tcp-transportmod
*
(import scheme)
(cond-expand
(chicken-4
(import (prefix sqlite3 sqlite3:)
chicken
extras
hostinfo
ports
posix
files
data-structures
tcp
))
(chicken-5
(import chicken.base
chicken.condition
chicken.file
chicken.pathname
chicken.process-context.posix
chicken.process
chicken.sort
chicken.string
chicken.time
chicken.tcp
chicken.random
chicken.file.posix
chicken.pretty-print
chicken.io
chicken.port
chicken.process-context
system-information)
(define unsetenv unset-environment-variable!)
))
(import address-info
directory-utils
matchable
md5
message-digest
regex
regex-case
s11n
srfi-1
srfi-18
srfi-4
srfi-69
stack
typed-records
tcp-server
debugprint
commonmod
dbfile
dbmod
portlogger
)
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;; parameters
;;
(define tt-server-timeout-param (make-parameter 600))
;; make ttdat visible
(define *server-info* #f)
(define (tt:make-remote areapath)
(make-tt areapath: areapath))
;; 1 ... or #f
;; and check that dbfname matches. FIXME: the propagation of dbfname and run-id
;; might not make the best sense
;;
(define (tt:valid-run-id run-id dbfname)
(and (or (number? run-id)
(not run-id))
(equal? (dbfile:run-id->dbfname run-id) dbfname)))
(tcp-buffer-size 2048)
;; (max-connections 4096)
;; do all the busy work of finding and setting up conn for
;; connecting to a server
;;
(define (tt:client-connect-to-server ttdat dbfname run-id testsuite)
(assert (tt:valid-run-id run-id dbfname) "FATAL: invalid run-id "run-id)
(let* ((conn (hash-table-ref/default (tt-conns ttdat) dbfname #f))
(server-start-proc (lambda ()
(tt:server-process-run
(tt-areapath ttdat)
testsuite ;; (dbfile:testsuite-name)
(common:find-local-megatest)
run-id))))
(if conn
(begin
; (debug:print-info 0 *default-log-port* "already connected to the server")
conn) ;; we are already connected to the server
(let* ((sdat (tt:get-current-server-info ttdat dbfname)))
(match sdat
((host port start-time server-id pid dbfname2 servinffile)
(assert (equal? dbfname dbfname2) "FATAL: read server info from wrong file.")
;(debug:print-info 0 *default-log-port* "in match servinffile:" servinffile)
(let* ((host-port (conc host":"port))
(conn (make-tt-conn
host: host
port: port
host-port: host-port
dbfname: dbfname
servinf-file: servinffile
server-id: server-id
server-start: start-time
pid: pid)))
;; verify we can talk to this server
(let* ((result (tt:timed-ping host port server-id))
(ping-res (car result))
(ping (cdr result)))
(debug:print-info 0 *default-log-port* "ping time: " ping)
(case ping-res
((running)
(hash-table-set! (tt-conns ttdat) dbfname conn) ;;; is this ok to save before validating that the connection is good?
conn)
((starting)
(thread-sleep! 0.5)
(tt:client-connect-to-server ttdat dbfname run-id testsuite))
(else
(let* ((curr-secs (current-seconds)))
;; rm the (last server) would go here
(if (> (- curr-secs (tt-last-serv-start ttdat)) 10)
(begin
(tt-last-serv-start-set! ttdat curr-secs)
(server-start-proc))) ;; start server if 30 sec since last attempt
(thread-sleep! 1)
(tt:client-connect-to-server ttdat dbfname run-id testsuite)))))))
(else ;; no good server found, if haven't started server in > 5 secs, start another
(if (> (- (current-seconds) (tt-last-serv-start ttdat)) 5) ;; BUG - grow this number really do not want to swamp the machine with servers
(begin
(debug:print-info 0 *default-log-port* "No server found. Starting one for run-id "run-id" in dbfile "dbfname)
(server-start-proc)
(tt-last-serv-start-set! ttdat (current-seconds))))
(thread-sleep! 1)
(tt:client-connect-to-server ttdat dbfname run-id testsuite)))))))
(define (tt:timed-ping host port server-id)
(let* ((start-time (current-milliseconds))
(result (tt:ping host port server-id)))
(cons result (- (current-milliseconds) start-time))))
(define (tt:ping host port server-id #!optional (tries-left 5))
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;; parameters
;;
(define tt-server-timeout-param (make-parameter 600))
;; make ttdat visible
(define *server-info* #f)
(define *server-run* #t)
(define (tt:make-remote areapath)
(make-tt areapath: areapath))
;; 1 ... or #f
;; and check that dbfname matches. FIXME: the propagation of dbfname and run-id
;; might not make the best sense
;;
(define (tt:valid-run-id run-id dbfname)
(and (or (number? run-id)
(not run-id))
(equal? (dbfile:run-id->dbfname run-id) dbfname)))
(tcp-buffer-size 2048)
;; (max-connections 4096)
(define (tt:get-conn ttdat dbfname)
(hash-table-ref/default (tt-conns ttdat) dbfname #f))
;; do all the busy work of finding and setting up conn for
;; connecting to a server
;;
(define (tt:client-connect-to-server ttdat dbfname run-id testsuite server-start-proc)
(assert (tt:valid-run-id run-id dbfname) "FATAL: invalid run-id "run-id)
(debug:print-info 2 *default-log-port* "tt:client-connect-to-server " dbfname " " run-id)
(let* ((conn (tt:get-conn ttdat dbfname))
(server-start-proc (or server-start-proc
(lambda ()
(assert (equal? dbfname "main.db") ;; only main.db is started here
"FATAL: called server-start-proc for db other than main.db")
(tt:server-process-run
(tt-areapath ttdat)
testsuite ;; (dbfile:testsuite-name)
(common:find-local-megatest)
run-id)))))
(if conn
(begin
(debug:print-info 2 *default-log-port* "already connected to a server")
conn) ;; we are already connected to the server
(let* ((sdats (tt:get-server-info-sorted ttdat dbfname))
(sdat (if (null? sdats)
#f
(car sdats))))
(match sdat
((host port start-time server-id pid dbfname2 servinffile)
(assert (equal? dbfname dbfname2) "FATAL: read server info from wrong file.")
(debug:print-info 2 *default-log-port* "no conn - in match servinffile:" servinffile)
(let* ((host-port (conc host":"port))
(conn (make-tt-conn
host: host
port: port
host-port: host-port
dbfname: dbfname
servinf-file: servinffile
server-id: server-id
server-start: start-time
pid: pid)))
;; verify we can talk to this server
(let* ((result (tt:timed-ping host port server-id))
(ping-res (car result))
(ping (cdr result)))
(debug:print-info 2 *default-log-port* "host " host " port " port " ping time: " ping " result " ping-res)
(case ping-res
((running)
(debug:print-info 2 *default-log-port* "Setting conn = " conn " in hash table")
(hash-table-set! (tt-conns ttdat) dbfname conn) ;;; is this ok to save before validating that the connection is good?
conn)
((starting)
(thread-sleep! 0.5)
(debug:print-info 0 *default-log-port* "server for " dbfname " is in starting state, retrying connect")
(tt:client-connect-to-server ttdat dbfname run-id testsuite server-start-proc))
(else
(let* ((curr-secs (current-seconds)))
(if (not ping-res) ;; the server is actually dead, remove the .servinfo file
(begin
(debug:print-info 0 *default-log-port* "Unreachable server at "
host":"port" with servinfo file "servinffile", removing it")
(if (file-exists? servinffile)
(handle-exceptions
exn
#f
(delete-file servinffile)))))
;; rm the (last server) would go here
(if (> (- curr-secs (tt-last-serv-start ttdat)) 10)
(begin
(tt-last-serv-start-set! ttdat curr-secs)
(server-start-proc))) ;; start server if 10 sec since last attempt
(thread-sleep! 1)
(debug:print-info 0 *default-log-port* "server ping result was "ping-res" neither running nor starting. Retrying connect")
(tt:client-connect-to-server ttdat dbfname run-id testsuite server-start-proc)))))))
(else ;; no good server found, if haven't started server in > 5 secs, start another
(if (> (- (current-seconds) (tt-last-serv-start ttdat)) 3) ;; BUG - grow this number really do not want to swamp the machine with servers
(begin
(debug:print-info 0 *default-log-port* "Starting server for "dbfname)
(server-start-proc)
(tt-last-serv-start-set! ttdat (current-seconds))
(thread-sleep! 3)
))
(thread-sleep! 1)
(debug:print-info 0 *default-log-port* "Connect to server for " dbfname)
(tt:client-connect-to-server ttdat dbfname run-id testsuite server-start-proc)))))))
;; returns ( result . ping_time )
(define (tt:timed-ping host port server-id)
(let* ((start-time (current-milliseconds))
(result (tt:ping host port server-id)))
(cons result (- (current-milliseconds) start-time))))
(define (tt:ping host port server-id #!optional (tries-left 5))
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;; (debug:print 0 *default-log-port* "res not in form (status errmsg result meta), got: "res)
(try-again)))))
;; client side handler
;;
;;(tt:handler #<tt> get-keys #f () 2 #f "/home/matt/data/megatest/ext-tests" #f "main.db" "ext-tests" "/home/matt/data/megatest/bin/.22.04/../megatest")
;;
(define (tt:handler ttdat cmd run-id params attemptnum area-dat areapath readonly-mode dbfname testsuite mtexe)
;; NOTE: areapath is passed in and in tt struct. We'll use passed in value for now.
(let* ((conn (tt:client-connect-to-server ttdat dbfname run-id testsuite))) ;; (hash-table-ref/default (tt-conns ttdat) dbfname #f)))
(if conn
;; have connection, call the server
(let* ((res (tt:send-receive ttdat conn cmd run-id params)))
;; res is (status errmsg result meta)
; (debug:print 0 *default-log-port* "conn:" conn " res: " res)
(let* ((dly (if (number? result) result 0.1)))
(debug:print 0 *default-log-port* "WARNING: server for "dbfname" is busy, will try again in "dly" seconds.")
(thread-sleep! dly)
(tt:handler ttdat cmd run-id params (+ attemptnum 1) area-dat areapath readonly-mode dbfname testsuite mtexe)))
((loaded)
(debug:print 0 *default-log-port* "WARNING: server for "dbfname" is loaded, slowing queries.")
(tt:backoff-incr (tt-conn-host conn)(tt-conn-port conn))
result) ;; (tt:handler ttdat cmd run-id params (+ attemptnum 1) area-dat areapath readonly-mode dbfname testsuite mtexe))
(else
result)))
(else ;; did not receive properly formated result
(if (not res) ;; tt:handler is telling us that communication failed
(let* ((host (tt-conn-host conn))
(port (tt-conn-port conn))
;; (dbfname (tt-conn-port conn)) ;; 192.168.0.127:4242-726924:4.db
(pid (tt-conn-pid conn))
;;(servinf (tt-conn-servinf-file conn)))
(servinf (tt-servinf-file ttdat))) ;; (conc areapath"/.servinfo/"host":"port"-"pid":"dbfname))) ;; TODO, use (server:get-servinfo-dir areapath)
(hash-table-set! (tt-conns ttdat) dbfname #f)
(if (and servinf (file-exists? servinf))
(begin
(if (< attemptnum 10)
(begin
(thread-sleep! 0.5)
(tt:handler ttdat cmd run-id params (+ attemptnum 1) area-dat areapath readonly-mode dbfname testsuite mtexe))
(begin
(debug:print 0 *default-log-port* "INFO: no response from server "host":"port" for "dbfname)
(if (and (file-exists? servinf)
(> (- (current-seconds)(file-modification-time servinf)) 60))
(begin
(debug:print 0 *default-log-port* "INFO: "servinf" file seems old and no ping response, removing it.")
(handle-exceptions
exn
#f
(delete-file* servinf))
(tt:handler ttdat cmd run-id params (+ attemptnum 1) area-dat areapath readonly-mode dbfname testsuite mtexe))
(begin
;; start server - addressed in client-connect-to-server
;; delay - addressed in client-connect-to-server
;; try again
(thread-sleep! 0.25) ;; dunno, I think this needs to be here
(tt:handler ttdat cmd run-id params (+ attemptnum 1) area-dat areapath readonly-mode dbfname testsuite mtexe))
))))
(begin ;; no server file, delay and try again
(debug:print 0 *default-log-port* "INFO: connection to server "host":"port" broken for "dbfname", but do not see servinf file "servinf)
(thread-sleep! 0.5)
(tt:handler ttdat cmd run-id params (+ attemptnum 1) area-dat areapath readonly-mode dbfname testsuite mtexe))))
(begin ;; this case is where res is malformed. Probably should abort
(assert #f "FATAL: tt:handler received bad data "res)
;; (debug:print 0 *default-log-port* "INFO: got corrupt data from server "host":"port", "res", for "dbfname", will try again.")
;; (tt:handler ttdat cmd run-id params (+ attemptnum 1) area-dat areapath readonly-mode dbfname testsuite mtexe)
)))))
(begin
(thread-sleep! 1) ;; no conn yet set up, give it a rest and try again
(tt:handler ttdat cmd run-id params attemptnum area-dat areapath readonly-mode dbfname testsuite mtexe)))))
(define (tt:bid-for-servership run-id)
#f)
;; gets server info and appends path to server file
;; sorts by age, oldest first
;;
;; returns list of (host port startseconds server-id servinfofile)
;;
(define (tt:get-server-info-sorted ttdat dbfname)
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;; (debug:print 0 *default-log-port* "res not in form (status errmsg result meta), got: "res)
(try-again)))))
;; client side handler
;;
;;(tt:handler #<tt> get-keys #f () 2 #f "/home/matt/data/megatest/ext-tests" #f "main.db" "ext-tests" "/home/matt/data/megatest/bin/.22.04/../megatest")
;;
(define (tt:handler ttdat cmd run-id params attemptnum readonly-mode dbfname testsuite mtexe server-start-proc)
;; connect-to-server will start a server if needed.
(let* ((areapath (tt-areapath ttdat))
(conn (tt:client-connect-to-server ttdat dbfname run-id testsuite server-start-proc))) ;; looks up conn keyed by dbfname
(if conn
;; have connection, call the server
(let* ((res (tt:send-receive ttdat conn cmd run-id params)))
;; res is (status errmsg result meta)
(match res
((status errmsg result meta)
(if (list? meta)
(let* ((delay-wait (alist-ref 'delay-wait meta)))
(if (and (number? delay-wait)
(> delay-wait 0))
(begin
(debug:print 0 *default-log-port* "Server is loaded, delaying "delay-wait" seconds")
(thread-sleep! delay-wait)))))
(case status
((busy) ;; result will be how long the server wants you to delay
(let* ((raw-dly (if (number? result) result 0.1))
(dly (+ raw-dly (/ attemptnum 10)))) ;; (* raw-dly (/ attemptnum 2))))
(debug:print 0 *default-log-port* "WARNING: server for "dbfname" is busy, cmd is "cmd", will try again in "dly" seconds. This is attempt "(- attemptnum 1))
(thread-sleep! dly)
(tt:handler ttdat cmd run-id params (+ attemptnum 1) readonly-mode dbfname testsuite mtexe server-start-proc)))
((loaded)
(debug:print 0 *default-log-port* "WARNING: server for "dbfname" is loaded, slowing queries.")
(tt:backoff-incr (tt-conn-host conn)(tt-conn-port conn))
result) ;; (tt:handler ttdat cmd run-id params (+ attemptnum 1) readonly-mode dbfname testsuite mtexe))
(else
result)))
(else ;; did not receive properly formated result
(if (not res) ;; tt:send-receive telling us that communication failed
(let* ((host (tt-conn-host conn))
(port (tt-conn-port conn))
;; (dbfname (tt-conn-port conn)) ;; 192.168.0.127:4242-726924:4.db
(pid (tt-conn-pid conn))
;;(servinf (tt-conn-servinf-file conn)))
(servinf (tt-servinf-file ttdat))) ;; (conc areapath"/.servinfo/"host":"port"-"pid":"dbfname))) ;; TODO, use (server:get-servinfo-dir areapath)
(hash-table-set! (tt-conns ttdat) dbfname #f) ;; clear out the conn for this dbfname to force finding new server
(if (and servinf (file-exists? servinf))
(begin
(if (< attemptnum 10)
(begin
(thread-sleep! 0.5)
(tt:handler ttdat cmd run-id params (+ attemptnum 1) readonly-mode dbfname testsuite mtexe server-start-proc))
(begin
(debug:print 0 *default-log-port* "INFO: no response from server "host":"port" for "dbfname)
(if (and (file-exists? servinf)
(> (- (current-seconds)(file-modification-time servinf)) 60))
(begin
(debug:print 0 *default-log-port* "INFO: "servinf" file seems old and no ping response, removing it.")
(handle-exceptions
exn
#f
(delete-file* servinf))
(tt:handler ttdat cmd run-id params (+ attemptnum 1) readonly-mode dbfname testsuite mtexe server-start-proc))
(begin
;; start server - addressed in client-connect-to-server
;; delay - addressed in client-connect-to-server
;; try again
(thread-sleep! 0.25) ;; dunno, I think this needs to be here
(tt:handler ttdat cmd run-id params (+ attemptnum 1) readonly-mode dbfname testsuite mtexe server-start-proc))
))))
(begin ;; no server file, delay and try again
(debug:print 2 *default-log-port* "INFO: connection to server "host":"port" broken for "dbfname", no servinf file. Server exited? ")
(thread-sleep! 0.5)
(tt:handler ttdat cmd run-id params (+ attemptnum 1) readonly-mode dbfname testsuite mtexe server-start-proc))))
(begin ;; this case is where res is malformed. Probably should abort
(assert #f "FATAL: tt:handler received bad data "res)
;; (debug:print 0 *default-log-port* "INFO: got corrupt data from server "host":"port", "res", for "dbfname", will try again.")
;; (tt:handler ttdat cmd run-id params (+ attemptnum 1) readonly-mode dbfname testsuite mtexe)
)))))
(begin
(thread-sleep! 1) ;; no conn yet set up, give it a rest and try again
(tt:handler ttdat cmd run-id params attemptnum readonly-mode dbfname testsuite mtexe server-start-proc)))))
;; gets server info and appends path to server file
;; sorts by age, oldest first
;;
;; returns list of (host port startseconds server-id servinfofile)
;;
(define (tt:get-server-info-sorted ttdat dbfname)
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(if (or (> (length sorted) 1)
(common:low-noise-print 120 "server info sorted"))
(debug:print 2 *default-log-port* "SERVER #"count": "(string-intersperse (map conc sorted) ", ")))
(set! count (+ count 1)))
sorted)
sorted))
(define (tt:get-current-server-info ttdat dbfname)
(assert (tt-areapath ttdat) "FATAL: areapath not set in ttdat.")
;;
;; TODO - replace most of below with tt;get-server-info-sorted
;;
(let* ((areapath (tt-areapath ttdat))
(sfiles (tt:find-server areapath dbfname))
(sdats (filter car (map tt:server-get-info sfiles))) ;; first element is #f if the file disappeared while being read
(sorted (sort sdats (lambda (a b)
(< (list-ref a 2)(list-ref b 2))))))
(if (null? sorted)
#f ;; we'll want to wait until extra servers have exited
(car sorted))))
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(if (or (> (length sorted) 1)
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(debug:print 2 *default-log-port* "SERVER #"count": "(string-intersperse (map conc sorted) ", ")))
(set! count (+ count 1)))
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sorted))
(define (tt:send-receive ttdat conn cmd run-id params)
(let* ((host-port (tt-conn-host-port conn)) ;; (conc (tt-conn-host conn)":"(tt-conn-port conn)))
(host (tt-conn-host conn))
(port (tt-conn-port conn))
(dat (list cmd run-id params #f))) ;; no meta data yet
(tt:send-receive-direct host port dat)))
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#f)
;; start the listener and start responding to requests
;;
;; NOTE: organise by dbfname, not run-id so we don't need
;; to pull in more modules
;;
;; This is the routine called in megatest.scm to start a server
;;
;; Server viability is checked in keep-running. Blindly start and run here.
;;
(define (tt:start-server areapath run-id dbfname-in handler keys)
(assert areapath "FATAL: areapath not provided for tt:start-server")
;; is there already a server for this dbfile? Then exit.
(dbfname (or dbfname-in (dbmod:run-id->dbfname run-id)))
(servers (tt:find-server areapath dbfname))) ;; should use tt:get-current-server-info instead
(if (> (length servers) 4)
(begin
(debug:print 0 *default-log-port* "INFO: found server(s) already running for db "dbfname", "(string-intersperse servers ",")" Exiting.")
(exit))
(let* ((dbstruct (dbmod:open-dbmoddb areapath run-id dbfname (dbfile:db-init-proc) keys)))
(tt-handler-set! ttdat (handler dbstruct))
(let* ((tcp-thread (make-thread
(lambda ()
(tt:start-tcp-server ttdat)) ;; start the tcp-server which applies handler to incoming data
"tcp-server-thread"))
(run-thread (make-thread
(lambda ()
(tt:keep-running ttdat dbfname dbstruct)))))
(thread-start! tcp-thread)
(thread-start! run-thread)
(let* ((areapath (tt-areapath ttdat))
(nosyncdbpath (conc areapath"/.mtdb")))
;; this didn't seem to work, is port not available yet?
(let loop ((count 0))
(if (tt-port ttdat)
(begin
(procinf-port-set! *procinf* (tt-port ttdat))
(procinf-dbname-set! *procinf* dbfname)
(dbfile:with-no-sync-db
nosyncdbpath
(lambda (nsdb)
(dbfile:insert-or-update-process nsdb *procinf*))))
(if (< count 5)
(begin
(thread-sleep! 0.5)
(loop (+ count 1)))
(debug:print 0 *default-log-port* "ERROR: (tt-port ttdat) no port set!"))))
(thread-join! run-thread) ;; run thread will exit on timeout or other conditions
;; replace with call to (dbfile:set-process-done nsdb host pid reason)
(procinf-status-set! *procinf* "done")
(procinf-end-set! *procinf* (current-seconds))
(dbfile:with-no-sync-db
nosyncdbpath
(lambda (nsdb)
(dbfile:insert-or-update-process nsdb *procinf*)))
(debug:print 0 *default-log-port* "Exiting now.")
(exit)))))))
(define (tt:keep-running ttdat dbfname dbstruct)
;; verfiy conn for ready
;; listener socket has been started by this stage
;; wait for a port before creating the registration file
;;
(let* ((db-locked-in #f)
(areapath (tt-areapath ttdat))
(nosyncdbpath (conc areapath"/.mtdb"))
(cleanup (lambda ()
(if (tt-cleanup-proc ttdat)
((tt-cleanup-proc ttdat)))
(dbfile:with-no-sync-db nosyncdbpath
(lambda (db)
(let* ((dbtmpname (dbr:dbstruct-dbtmpname dbstruct)))
(debug:print-info 0 *default-log-port* "Running clean up, including removing db file "dbtmpname)
(db:no-sync-del! db dbfname)
#;(if dbtmpname
(delete-file dbtmpname))))))))
(set! *server-info* ttdat)
(let loop ((count 0))
(if (> count 240)
(begin
(debug:print 0 *default-log-port* "FATAL: Could not start a tcp server, giving up.")
(exit 1))
(if (not (tt-port ttdat)) ;; no connection yet
(begin
(thread-sleep! 0.25)
(loop (+ count 1))))))
(tt:create-server-registration-file ttdat dbfname)
;; now start watching the last-access, if it hasn't been touched
;; in over ten seconds we exit
(thread-sleep! 0.05) ;; any real need for delay here?
(let loop ()
(let* ((servers (tt:get-server-info-sorted ttdat dbfname))
(ok (cond
((null? servers) #f) ;; not ok
((equal? (list-ref (car servers) 6) ;; compare the servinfofile
(tt-servinf-file ttdat))
(let* ((res (if db-locked-in
#t
(let* ((lock-result ;; this is the primary lock - need to double verify that got it
(dbfile:with-no-sync-db
nosyncdbpath
(lambda (db)
(db:no-sync-lock-and-check db dbfname
(tt-servinf-file ttdat)
;; (dbr:dbstruct-dbtmpname dbstruct)
))))
(success (car lock-result)))
(if success
(begin
(tt-state-set! ttdat 'running)
(debug:print 0 *default-log-port* "Got server lock for " dbfname)
(set! db-locked-in #t)
#t)
(begin
(debug:print 0 *default-log-port* "Failed to get server lock for "dbfname)
#f))))))
(if (and res (common:low-noise-print 120 "top server message"))
(debug:print-info 0 *default-log-port* "Keep running, I'm the top server for "
dbfname" on "(tt-host ttdat)":"(tt-port ttdat)))
res))
(else
(debug:print-info 0 *default-log-port* "I'm not the lead server: "servers)
(let* ((leadsrv (car servers)))
(match leadsrv
((host port startseconds server-id pid dbfname servinfofile)
(let* ((result (tt:timed-ping host port server-id))
(res (car result))
(ping (cdr result)))
(debug:print-info 0 *default-log-port* "Ping to "host":"port", with server-id "server-id
", and file "servinfofile" returned "res)
(if res
#f ;; not the server, but all good, want to exit
(if (and (file-exists? servinfofile)
(> (- (current-seconds)(file-modification-time servinfofile)) 30))
(begin
;; can't ping and file has been on disk 15 seconds, go ahead and try to remove it
(debug:print-info 0 *default-log-port* "Removing apparently dead server info file: "servinfofile)
(handle-exceptions
exn
(debug:print-info 0 *default-log-port* "Error removing server info file: "servinfofile)
(delete-file* servinfofile)
)
#t) ;; not the server but the server is not reachable
(begin
(debug:print 0 *default-log-port* "I'm not the server but could not ping "host":"port", will try again.")
(thread-sleep! 1) ;; just because
#t)))))
(else ;; should never get here
(debug:print 0 *default-log-port* "BAD SERVER RECORD: "leadsrv)
(assert #f "Bad server record "leadsrv))))))))
(if ok
(tt-last-access-set! ttdat *db-last-access*) ;; bit silly, just use db-last-access
(begin
(debug:print 0 *default-log-port* "Exiting immediately")
(cleanup)
(exit)))
(let* ((last-update (dbr:dbstruct-last-update dbstruct))
(curr-secs (current-seconds)))
(if (and (eq? (tt-state ttdat) 'running)
(> (- curr-secs last-update) 3)) ;; every 3-4 seconds update the db?
(begin
(set! (file-modification-time (tt-servinf-file ttdat)) (current-seconds))
((dbr:dbstruct-sync-proc dbstruct) last-update)
(dbr:dbstruct-last-update-set! dbstruct curr-secs))))
(if (< (- (current-seconds) (tt-last-access ttdat)) (tt-server-timeout-param))
(begin
(thread-sleep! 5)
(loop)))))
(cleanup)
(debug:print 0 *default-log-port* "INFO: Server timed out, exiting from tt:keep-running.")))
;; ;; given an already set up uconn start the cmd-loop
;; ;;
;; (define (tt:cmd-loop ttdat)
;; (let* ((serv-listener (-socket uconn))
;; (listener (lambda ()
;; (let loop ((state 'start))
;; (let-values (((inp oup)(tcp-accept serv-listener)))
;; ;; (mutex-lock! *send-mutex*) ;; DOESN'T SEEM TO HELP
;; (let* ((rdat (deserialize inp)) ;; '(my-host-port qrykey cmd params)
;; (resp (ulex-handler uconn rdat)))
;; (serialize resp oup)
;; (close-input-port inp)
;; (close-output-port oup)
;; ;; (mutex-unlock! *send-mutex*) ;; DOESN'T SEEM TO HELP
;; )
;; (loop state))))))
;; ;; start N of them
;; (let loop ((thnum 0)
;; (threads '()))
;; (if (< thnum 100)
;; (let* ((th (make-thread listener (conc "listener" thnum))))
;; (thread-start! th)
;; (loop (+ thnum 1)
;; (cons th threads)))
;; (map thread-join! threads)))))
;;
;;
;;
;; (define (wait-and-close uconn)
;; (thread-join! (udat-cmd-thread uconn))
;; (tcp-close (udat-socket uconn)))
;;
;;
(let* ((cleanproc (tt-cleanup-proc ttdat))
(port (tt-port ttdat)))
(tt-state-set! ttdat 'shutdown)
(portlogger:open-run-close portlogger:set-port port "released")
(if cleanproc (cleanproc))
(tcp-close (tt-socket ttdat)) ;; close up ports here
))
;; (define (wait-and-close uconn)
;; (thread-join! (tt-cmd-thread uconn))
;; (tcp-close (tt-socket uconn)))
(serv-id (tt:mk-signature areapath))
(clean-proc (lambda ()
(delete-file* servinf)
)))
(assert (and host port) "FATAL: tt:create-server-registration-file called with no conn, dbfname="dbfname)
(tt-cleanup-proc-set! ttdat clean-proc)
(sfiles (glob (conc servdir"/*:"dbfname))))
sfiles))
;; given a path to a server info file return: host port startseconds server-id pid dbfname logf
;; example of what it's looking for in the log file:
;; SERVER STARTED: 10.38.175.67:50216 AT 1616502350.0 server-id: 4907e90fc55c7a09694e3f658c639cf4
;;
(define (tt:server-get-info logf)
(let ((server-rx (regexp "^SERVER STARTED: (\\S+):(\\d+) AT ([\\d\\.]+) server-id: (\\S+) pid: (\\d+) dbfname: (\\S+)")) ;; SERVER STARTED: host:port AT timesecs server id
(dbprep-rx (regexp "^SERVER: dbprep"))
(dbprep-found 0)
(bad-dat (list #f #f #f #f #f #f logf)))
(let ((fdat (handle-exceptions
exn
(begin
;; WARNING: this is potentially dangerous to blanket ignore the errors
(debug:print-info 0 *default-log-port* "Unable to get server info from "logf", exn="(condition->list exn))
'()) ;; no idea what went wrong, call it a bad server, return empty list
(with-input-from-file logf read-lines))))
(if (null? fdat) ;; bad data, return bad-dat
bad-dat
(let loop ((inl (car fdat))
(tail (cdr fdat))
(lnum 0))
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|
#f)
;; start the listener and start responding to requests
;;
;; NOTE: organise by dbfname, not run-id so we don't need
;; to pull in more modules
;;
;; This is the routine called in megatest.scm to start a server. NOTE: sequence is different for main.db vs. X.db
;;
;; Server viability is checked in keep-running. Blindly start and run here.
;;
(define (tt:start-server areapath run-id dbfname-in handler keys)
(assert areapath "FATAL: areapath not provided for tt:start-server")
(let* ((ttdat (make-tt areapath: areapath))
(dbfname (or dbfname-in (dbmod:run-id->dbfname run-id))))
(set! *server-info* ttdat)
(let* ((dbstruct (dbmod:open-dbmoddb areapath run-id dbfname (dbfile:db-init-proc) keys)))
(tt-handler-set! ttdat (handler dbstruct))
(let* ((servinf-created #f)
(tcp-thread (make-thread
(lambda ()
;; NOTE: tt-port and tt-host are set in connect-listener which is called under tt:start-tcp-server
(tt:start-tcp-server ttdat)) ;; start the tcp-server which applies handler to incoming data
"tcp-server-thread"))
(run-thread (make-thread
(lambda ()
(tt:keep-running ttdat dbfname dbstruct)))))
(thread-start! tcp-thread)
(let* ((areapath (tt-areapath ttdat))
(nosyncdbpath (conc areapath"/.mtdb"))
(servers ;; (tt:find-server areapath dbfname)))
(tt:get-server-info-sorted ttdat dbfname)) ;; (host port startseconds server-id servinfofile)
(good-srvrs
;; contact servers via ping, if no response remove the .servinfo file
(let loop ((servrs servers)
(prime-host #f)
(result '()))
(if (null? servrs)
(reverse result)
(let* ((servdat (car servrs)))
(match servdat
((host port startseconds server-id servinfofile)
(let* ((ping-res (tt:timed-ping host port server-id))
(good-ping (match ping-res
((result . ping-time)
(not result)) ;; we couldn't reach the server or it was not a megatest server
(else #f))) ;; the ping failed completely?
(same-host (or (not prime-host) ;; i.e. this is the first host
(equal? prime-host host)))
(keep-srv (and good-ping same-host)))
(if keep-srv
(loop (cdr servrs)
host
(cons servdat result))
(begin
(handle-exceptions
exn
(debug:print-info 0 *default-log-port* "Error removing server info file: "servinfofile", "
(condition->list exn))
(delete-file* servinfofile))
(loop (cdr servrs) prime-host result)))))
(else
;; can't delete it as we don't have a filename. NOTE: Should really never get here.
(debug:print-info 0 *default-log-port* "ERROR: bad servinfo record \""servdat"\"")
(loop (cdr servrs) prime-host result)) ;; drop
)))))
(home-host (if (null? good-srvrs)
#f
(caar good-srvrs))))
;; by here we have a trustworthy list of servers and we have removed the .servinfo file for any unresponsive servers
;; and the list is in good-srvrs
(cond
((not home-host) ;; no servers yet, go ahead and start
(debug:print-info 0 *default-log-port* "No servers yet, starting on "(get-host-name)))
((> (length good-srvrs) 2) ;; don't need more, just exit
(debug:print-info 0 *default-log-port* "Have "(length good-srvrs)", no need for more, exiting.")
(exit))
((not (equal? home-host (get-host-name))) ;; there is a home-host and we are not on it
(debug:print-info 0 *default-log-port* "Prime main server is on host "home-host", but we are on host "(get-host-name)", exiting.")
(exit))
(else
(debug:print-info 0 *default-log-port* "Starting on host "(get-host-name)", along with "(length good-srvrs)" other servers.")))
;; this didn't seem to work, is port not available yet?
(let loop ((count 0))
(if (tt-port ttdat)
(begin
(procinf-port-set! *procinf* (tt-port ttdat))
(procinf-dbname-set! *procinf* dbfname)
(dbfile:with-no-sync-db
nosyncdbpath
(lambda (nsdb)
(dbfile:insert-or-update-process nsdb *procinf*))))
(if (< count 10)
(begin
(thread-sleep! 0.25)
(loop (+ count 1)))
(begin
(debug:print 0 *default-log-port* "ERROR: (tt-port ttdat) no port set! Exiting.")
(exit)))))
;; create a servinfo file start keep-running
(tt:create-server-registration-file ttdat dbfname)
(procinf-status-set! *procinf* "running")
(tt-state-set! ttdat 'running)
(dbfile:with-no-sync-db
nosyncdbpath
(lambda (nsdb)
(dbfile:insert-or-update-process nsdb *procinf*)))
(thread-start! run-thread)
(thread-join! run-thread) ;; run thread will exit on timeout or other conditions
;; (tcp-close (tt-socket ttdat)) ;; close up ports here
;; replace with call to (dbfile:set-process-done nsdb host pid reason)
(procinf-status-set! *procinf* "done")
(procinf-end-set! *procinf* (current-seconds))
;; either convert this to use set-process-done or get rid of set-process-done
(dbfile:with-no-sync-db
nosyncdbpath
(lambda (nsdb)
(dbfile:insert-or-update-process nsdb *procinf*)))
(debug:print 0 *default-log-port* "Exiting now.")
(exit))))))
(define (tt:keep-running ttdat dbfname dbstruct)
;; at this point the server is running and responding to calls, we just monitor
;; for db calls and exit if there are none.
;; if I am not in the first 3 servers, exit
(let* ((start-time (current-seconds)))
(let loop ()
(let* ((servers (tt:get-server-info-sorted ttdat dbfname))
(home-host (if (null? servers)
#f
(caar servers)))
(my-index (list-index (lambda (x)
(equal? (list-ref x 6)
(tt-servinf-file ttdat)))
servers))
(ok (cond
((not *server-run*)
(debug:print 0 *default-log-port* "WARNING: received a stop server from client by remote request.")
#f)
((null? servers)
(debug:print 0 *default-log-port* "WARNING: no servinfo files found, this cannot be.")
#f) ;; not ok
((> my-index 2)
(debug:print 0 *default-log-port* "WARNING: there are more than two servers ahead of me, I'm not needed, exiting.")
#f) ;; not ok to not be in first three
((eq? (tt-state ttdat) 'running) #t) ;; we are good to keep going
((> (- (current-seconds) start-time) 30)
(debug:print 0 *default-log-port* "WARNING: over 30 seconds and not yet in runnning mode. Exiting.")
#f)
(else #t))))
(if ok
(tt-last-access-set! ttdat *db-last-access*) ;; bit silly, just use db-last-access
(begin
(debug:print 0 *default-log-port* "Exiting immediately")
(tt:shutdown-server ttdat)
(exit)))
(let* ((last-update (dbr:dbstruct-last-update dbstruct))
(curr-secs (current-seconds)))
(if (and (eq? (tt-state ttdat) 'running)
(> (- curr-secs last-update) 5)) ;; every 5 seconds update the db?
(let* ((sinfo-file (tt-servinf-file ttdat)))
;; (debug:print 0 *default-log-port* "INFO: touching "sinfo-file)
(set! (file-modification-time sinfo-file) (current-seconds))
((dbr:dbstruct-sync-proc dbstruct) last-update)
(dbr:dbstruct-last-update-set! dbstruct curr-secs))))
(if (< (- (current-seconds) (tt-last-access ttdat)) (tt-server-timeout-param))
(begin
(thread-sleep! 5)
(loop)))))
(tt:shutdown-server ttdat)
(debug:print 0 *default-log-port* "INFO: Server timed out, exiting from tt:keep-running.")))
(define (tt:shutdown-server ttdat)
(let* ((host (tt-host ttdat))
(port (tt-port ttdat))
(sinf (tt-servinf-file ttdat)))
(tt-state-set! ttdat 'shutdown)
(portlogger:open-run-close portlogger:set-port port "released")
(if (file-exists? sinf)
(delete-file* sinf))
))
;; return servid
;; side-effects:
;; ttdat-cleanup-proc is populated with function to remove the serverinfo file
(define (tt:create-server-registration-file ttdat dbfname)
(let* ((areapath (tt-areapath ttdat))
(servdir (tt:get-servinfo-dir areapath))
(host (tt-host ttdat))
(port (tt-port ttdat))
(servinf (conc servdir"/"host":"port"-"(current-process-id)":"dbfname))
(serv-id (tt:mk-signature areapath)))
(assert (and host port) "FATAL: tt:create-server-registration-file called with no conn, dbfname="dbfname)
(tt-servinf-file-set! ttdat servinf)
(with-output-to-file servinf
(lambda ()
(print "SERVER STARTED: "host":"port" AT "(current-seconds)" server-id: "serv-id" pid: "(current-process-id)" dbfname: "dbfname)))
serv-id))
;; find valid server
;; get servers listed, last part of name must match :<dbfname>
;; if more than one, wait one second and look again
;; future: ping oldest, if alive remove other :<dbfname> files
;;
(define (tt:find-server areapath dbfname)
(let* ((servdir (tt:get-servinfo-dir areapath))
(sfiles (glob (conc servdir"/*:"dbfname)))
(goodfiles '()))
;; filter the files here by looking in processes table (if we are not main.db)
;; and or look at the time stamp on the servinfo file, a running server will
;; touch the file every minute (again, this will only apply for main.db)
(for-each (lambda (fname)
(let* ((age (- (current-seconds)(file-modification-time fname))))
(if (> age 200) ;; can't trust it if over 200 seconds old
(begin
(debug:print 0 *default-log-port* "WARNING: removing stale servinfo file "fname", it is "age" seconds old")
(handle-exceptions
exn
(debug:print 0 *default-log-port* "WARNING: error attempting to remove stale servinfo file "fname)
(delete-file fname))) ;;
(set! goodfiles (cons fname goodfiles)))))
sfiles)
goodfiles))
;; given a path to a server info file return: host port startseconds server-id pid dbfname logf
;; example of what it's looking for in the log file:
;; SERVER STARTED: 10.38.175.67:50216 AT 1616502350.0 server-id: 4907e90fc55c7a09694e3f658c639cf4
;;
(define (tt:server-get-info logf)
(let ((server-rx (regexp "^SERVER STARTED: (\\S+):(\\d+) AT ([\\d\\.]+) server-id: (\\S+) pid: (\\d+) dbfname: (\\S+)")) ;; SERVER STARTED: host:port AT timesecs server id
(dbprep-rx (regexp "^SERVER: dbprep"))
(dbprep-found 0)
(bad-dat (list #f #f #f #f #f #f logf)))
(let ((fdat (handle-exceptions
exn
(begin
;; BUG, TODO: add err checking, for now blanket ignore the errors?
(debug:print-info 0 *default-log-port* "Unable to get server info from "logf
", exn="(condition->list exn))
'()) ;; no idea what went wrong, call it a bad server, return empty list
(with-input-from-file logf read-lines))))
(if (null? fdat) ;; bad data, return bad-dat
bad-dat
(let loop ((inl (car fdat))
(tail (cdr fdat))
(lnum 0))
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(string->number pid)
dbfname
logf))
(else
(debug:print 0 *default-log-port* "ERROR: did not recognise SERVER line info "mlst)
bad-dat)))))))))
;; 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 (tt:server-process-run areapath testsuite mtexe run-id #!key (profile-mode "")) ;; areapath is *toppath* for a given testsuite area
(assert areapath "FATAL: tt:server-process-run called without areapath defined.")
(assert testsuite "FATAL: tt:server-process-run called without testsuite defined.")
(assert mtexe "FATAL: tt:server-process-run called without mtexe defined.")
;; mtest -server - -m testsuite:ext-tests -db 6.db
(let* ((dbfname (dbmod:run-id->dbfname run-id))
(load (get-normalized-cpu-load))
(trying (length (tt:find-server areapath dbfname)))
(nrun (number-of-processes-running (conc "mtest.*server.*"testsuite".*"dbfname))))
(cond
((> load 2.0)
(debug:print 0 *default-log-port* "Normalized load "load" on " (get-host-name) " is over the limit of 2.0. Not starting a server.")
(thread-sleep! 1))
((> nrun 100)
(debug:print 0 *default-log-port* nrun" servers running on " (get-host-name) ", not starting another.")
(thread-sleep! 1))
((> trying 4)
(debug:print 0 *default-log-port* trying" servers registered in .servinfo dir. not starting another.")
(thread-sleep! 1))
(else
(if (not (file-exists? (conc areapath"/logs")))
(create-directory (conc areapath"/logs") #t))
(let* ((logfile (conc areapath "/logs/server-"dbfname"-"(current-process-id)".log")) ;; -" curr-pid "-" target-host ".log"))
(cmdln (conc
mtexe
" -startdir "areapath
" -server - ";; (or target-host "-")
" -m testsuite:"testsuite
" -db "dbfname ;; (dbmod:run-id->dbfname run-id)
" " profile-mode
(conc " >> " logfile " 2>&1 &"))))
;; we want the remote server to start in *toppath* so push there
;; (push-directory areapath) ;; use cd in the command line instead
(debug:print 0 *default-log-port* "INFO: Trying to start server in tcp mode (" cmdln ") at "(common:human-time)" for "areapath)
;; (debug:print 0 *default-log-port* "INFO: starting server at " (common:human-time))
(system cmdln)
;; ;; use below to go back to nbfake - nbfake does cause trouble ...
;; (setenv "NBFAKE_QUIET" "yes") ;; BUG: change to with-environment-variable ...
;; (setenv "NBFAKE_LOG" logfile)
;; (system (conc "cd "areapath" ; nbfake " cmdln))
;; (unsetenv "NBFAKE_QUIET")
;; (unsetenv "NBFAKE_LOG")
;;(pop-directory)
)))))
;;======================================================================
;; tcp connection stuff
;;======================================================================
;; find a port and start tcp-server. This only starts the tcp portion of
;; the server, look at (tt:start-server ...) above for the entry point
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(string->number pid)
dbfname
logf))
(else
(debug:print 0 *default-log-port* "ERROR: did not recognise SERVER line info "mlst)
bad-dat)))))))))
(define *last-server-start* (make-hash-table))
(define (tt:too-recent-server-start dbfname)
(let* ((last-run-time (hash-table-ref/default *last-server-start* dbfname #f)))
(and last-run-time
(< (- (current-seconds) last-run-time) 5))))
;; 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 (tt:server-process-run areapath testsuite mtexe run-id #!key (profile-mode "")) ;; areapath is *toppath* for a given testsuite area
(assert areapath "FATAL: tt:server-process-run called without areapath defined.")
(assert testsuite "FATAL: tt:server-process-run called without testsuite defined.")
(assert mtexe "FATAL: tt:server-process-run called without mtexe defined.")
;; mtest -server - -m testsuite:ext-tests -db 6.db
(let* ((dbfname (dbmod:run-id->dbfname run-id)))
(if (tt:too-recent-server-start dbfname)
#f
(let* ((load (get-normalized-cpu-load))
(srvrs (tt:find-server areapath dbfname))
(trying (length srvrs))
(nrun (number-of-processes-running (conc "mtest.*server.*"testsuite".*"dbfname))))
(cond
((> load 2.0)
(debug:print 0 *default-log-port* "Normalized load "load" on " (get-host-name) " is over the limit of 2.0. Not starting a server. Please reduce the load on "(get-host-name)" by killing some processes")
(thread-sleep! 1)
#f)
((> nrun 100)
(debug:print 0 *default-log-port* nrun" servers running on " (get-host-name) ", not starting another.")
(thread-sleep! 1)
#f)
((> trying 2)
(debug:print 0 *default-log-port* trying" servers registered in .servinfo dir. not starting another.")
(thread-sleep! 1)
#f)
(else
(if (not (file-exists? (conc areapath"/logs")))
(create-directory (conc areapath"/logs") #t))
(let* ((logfile (conc areapath "/logs/server-"dbfname"-"(current-process-id)".log")) ;; -" curr-pid "-" target-host ".log"))
(cmdln (conc
mtexe
" -startdir "areapath
" -server - ";; (or target-host "-")
" -m testsuite:"testsuite
" -db "dbfname ;; (dbmod:run-id->dbfname run-id)
" " profile-mode
#;(conc " >> " logfile " 2>&1 &"))))
;; we want the remote server to start in *toppath* so push there
;; (push-directory areapath) ;; use cd in the command line instead
(debug:print 2 *default-log-port* "INFO: Trying to start server in tcp mode (" cmdln ") at "(common:human-time)" for "areapath)
;; (debug:print 0 *default-log-port* "INFO: starting server at " (common:human-time))
(setenv "NBFAKE_QUIET" "yes") ;; BUG: change to with-environment-variable ...
(setenv "NBFAKE_LOG" logfile)
(system (conc "cd "areapath" ; nbfake " cmdln))
(unsetenv "NBFAKE_QUIET")
(unsetenv "NBFAKE_LOG")
;; (system cmdln)
(hash-table-set! *last-server-start* dbfname (current-seconds))
;; ;; use below to go back to nbfake - nbfake does cause trouble ...
;; (setenv "NBFAKE_QUIET" "yes") ;; BUG: change to with-environment-variable ...
;; (setenv "NBFAKE_LOG" logfile)
;; (system (conc "cd "areapath" ; nbfake " cmdln))
;; (unsetenv "NBFAKE_QUIET")
;; (unsetenv "NBFAKE_LOG")
;;(pop-directory)
#t)))))))
;;======================================================================
;; tcp connection stuff
;;======================================================================
;; find a port and start tcp-server. This only starts the tcp portion of
;; the server, look at (tt:start-server ...) above for the entry point
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