;; Copyright 2006-2016, Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;;
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
(require-extension (srfi 18) extras tcp s11n)
(use srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest directory-utils)
;; (use zmq)
(use spiffy uri-common intarweb http-client spiffy-request-vars)
(declare (unit server))
(declare (uses common))
(declare (uses db))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(declare (uses synchash))
(declare (uses http-transport))
(declare (uses rpc-transport))
;;(declare (uses nmsg-transport))
(declare (uses launch))
(declare (uses daemon))
(include "common_records.scm")
(include "db_records.scm")
(define (server:make-server-url hostport)
(if (not hostport)
#f
(conc "http://" (car hostport) ":" (cadr hostport))))
(define *server-loop-heart-beat* (current-seconds))
(define *heartbeat-mutex* (make-mutex))
;;======================================================================
;; S E R V E R
;;======================================================================
;; Call this to start the actual server
;;
;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch run-id transport-type)
(let ((ttype (if (symbol? transport-type) transport-type (string->symbol (->string transport-type)))))
(case ttype
((http)(http-transport:launch run-id))
;;((nmsg)(nmsg-transport:launch run-id))
((rpc) (rpc-transport:launch run-id))
(else (debug:print-error 0 *default-log-port* "unknown server type " ttype)))))
;; (else (debug:print-error 0 *default-log-port* "No known transport set, transport=" transport ", using rpc")
;; (rpc-transport:launch run-id)))))
;;======================================================================
;; S E R V E R U T I L I T I E S
;;======================================================================
;; set global *transport-type* based on -transport switch and serer/transport configuration. default http otherwise.
;; called by launch:setup
(define (server:set-transport)
(let ((ttype (string->symbol
(or (args:get-arg "-transport")
(configf:lookup *configdat* "server" "transport")
"rpc"))))
(set! *transport-type* ttype)
ttype))
;; Get the transport -- DO NOT call this from client code. In client code, this is run-id sensitive and not a global
;; For code communicating with existing run-id with a server, use: (rmt:run-id->transport-type run-id)
(define (server:get-transport)
(if *transport-type*
*transport-type*
(server:set-transport)))
;; Generate a unique signature for this server
(define (server:mk-signature)
(message-digest-string (md5-primitive)
(with-output-to-string
(lambda ()
(write (list (current-directory)
(argv)))))))
;; 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)
;; (send-message pubsock
(case (server:get-transport)
((rpc) (db:obj->string (vector success/fail query-sig result)))
((http) (db:obj->string (vector success/fail query-sig result)))
((zmq)
(let ((pub-socket (vector-ref *runremote* 1)))
(send-message pub-socket return-addr send-more: #t)
(send-message pub-socket (db:obj->string (vector success/fail query-sig result)))))
((fs) result)
(else
(debug:print-error 0 *default-log-port* "unrecognised transport type: " *transport-type*)
result)))
;; Given a run id start a server process ### NOTE ### > file 2>&1
;; if the run-id is zero and the target-host is set
;; try running on that host
;; incidental: rotate logs in logs/ dir.
;;
(define (server:run run-id)
(let* ((curr-host (get-host-name))
(curr-ip (server:get-best-guess-address curr-host))
(target-host (configf:lookup *configdat* "server" "homehost" ))
(testsuite (common:get-testsuite-name))
(logfile (conc *toppath* "/logs/" run-id ".log"))
(cmdln (conc (common:get-megatest-exe)
" -server " (or target-host "-")
" -run-id " run-id " -log " logfile
" -m testsuite:" testsuite)))
(debug:print 0 *default-log-port* "INFO: Starting server (" cmdln ") as none running ...")
(push-directory *toppath*)
(if (not (directory-exists? "logs"))(create-directory "logs"))
;; Rotate logs, logic:
;; if > 500k and older than 1 week:
;; remove previous compressed log and compress this log
;;
(directory-fold
(lambda (file rem)
(if (and (string-match "^.*.log" file)
(> (file-size (conc "logs/" file)) 200000))
(let ((gzfile (conc "logs/" file ".gz")))
(if (file-exists? gzfile)
(begin
(debug:print-info 0 *default-log-port* "removing " gzfile)
(delete-file gzfile)))
(debug:print-info 0 *default-log-port* "compressing " file)
(system (conc "gzip logs/" file)))))
'()
"logs")
;; 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)
(common:wait-for-normalized-load 4 " delaying server start due to load" remote-host: (get-environment-variable "TARGETHOST")) ;; do not try starting servers on an already overloaded machine, just wait forever
(system (conc "nbfake " cmdln))
(unsetenv "TARGETHOST_LOGF")
(if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
;; (system cmdln)
(pop-directory)))
(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 run-id)
(let ((last-run-time (hash-table-ref/default *server-kind-run* run-id #f)))
(if (or (not last-run-time)
(> (- (current-seconds) last-run-time) 30))
(begin
(server:run run-id)
(hash-table-set! *server-kind-run* run-id (current-seconds))))))
;; The generic run a server command. Dispatches the call to server 0 if run-id != 0
;;
(define (server:try-running run-id)
(if (eq? run-id 0)
(server:run run-id)
(rmt:start-server run-id)))
(define (server:check-if-running run-id)
(let ((tdbdat (tasks:open-db)))
(let loop ((server (tasks:get-server-info (db:delay-if-busy tdbdat) run-id))
(trycount 0))
(if server
;; note: client:start will set *runremote*. this needs to be changed
;; also, client:start will login to the server, also need to change that.
;;
;; client:start returns #t if login was successful.
;;
(let* ((transport-type (rmt:run-id->transport-type run-id))
(res (case transport-type
((http)(server:ping-server run-id
(tasks:hostinfo-get-interface server)
(tasks:hostinfo-get-port server)))
((rpc) (rpc-transport:ping run-id
(tasks:hostinfo-get-interface server)
(tasks:hostinfo-get-port server)))
(else
(debug:print-error 0 *default-log-port* "(5) Transport [" transport-type
"] specified for run-id [" run-id
"] is not implemented in rmt:send-receive. Cannot proceed.")
(exit 1)))))
;; if the server didn't respond we must remove the record
(if res
#t
(begin
(debug:print-info 0 *default-log-port* "server at " server " not responding, removing record")
(tasks:server-force-clean-running-records-for-run-id (db:delay-if-busy tdbdat) run-id
" server:check-if-running")
res)))
#f))))
;; called in megatest.scm, host-port is string hostname:port
;;
(define (server:ping run-id host:port)
(let ((tdbdat (tasks:open-db)))
(let* ((host-port (let ((slst (string-split host:port ":")))
(if (eq? (length slst) 2)
(list (car slst)(string->number (cadr slst)))
#f)))
(toppath (launch:setup))
(server-db-dat (if (not host-port)(tasks:get-server-info (db:delay-if-busy tdbdat) run-id) #f)))
(if (not run-id)
(begin
(debug:print-error 0 *default-log-port* "must specify run-id when doing ping, -run-id n")
(print "ERROR: No run-id")
(exit 1))
(if (and (not host-port)
(not server-db-dat))
(begin
(print "ERROR: bad host:port")
(exit 1))
(let* ((iface (if host-port (car host-port) (tasks:hostinfo-get-interface server-db-dat)))
(port (if host-port (cadr host-port)(tasks:hostinfo-get-port server-db-dat)))
(server-dat (http-transport:client-connect iface port))
(login-res (rmt:login-no-auto-client-setup server-dat run-id)))
(if (and (list? login-res)
(car login-res))
(begin
(print "LOGIN_OK")
(exit 0))
(begin
(print "LOGIN_FAILED")
(exit 1)))))))))
;; run ping in separate process, safest way in some cases
;;
(define (server:ping-server run-id iface port)
(with-input-from-pipe
(conc (common:get-megatest-exe) " -run-id " run-id " -ping " (conc iface ":" port))
(lambda ()
(let loop ((inl (read-line))
(res "NOREPLY"))
(if (eof-object? inl)
(case (string->symbol res)
((NOREPLY) #f)
((LOGIN_OK) #t)
(else #f))
(loop (read-line) inl))))))
;; Client will call this procedure on the server via the low-level transport (http/rpc/etc) to verify its toppath matches the server's toppath.
;; A true result means client and server are associated with same megatest instance, share the same megatest.config, etc...) A false result means the client should not talk to this server.
(define (server:login toppath)
(set! *last-db-access* (current-seconds))
(if (equal? *toppath* toppath)
(begin
;; (debug:print-info 2 *default-log-port* "login successful")
#t)
(begin
;; (debug:print-info 2 *default-log-port* "login failed")
#f)))
(define (server:get-timeout)
(let ((tmo (configf:lookup *configdat* "server" "timeout")))
(if (and (string? tmo)
(string->number tmo))
(* 60 60 (string->number tmo))
;; (* 3 24 60 60) ;; default to three days
(* 60 1) ;; default to one minute
;; (* 60 60 25) ;; default to 25 hours
)))