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vmm_influxdb_stats: more printf debug

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This commit is contained in:
Hannes Mehnert 2018-04-30 00:43:28 +02:00
parent c9afb6f5dc
commit 43b152fa6c
1 changed files with 37 additions and 7 deletions
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44
app/vmm_influxdb_stats.ml
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@ -147,15 +147,32 @@ let command = ref 1
let (req : string IM.t ref) = ref IM.empty let (req : string IM.t ref) = ref IM.empty
let tcp_sent = ref 0
let socket_read = ref 0
let socket_sent = ref 0
let str_of_e = function
| `Eof -> "end of file"
| `Exception -> "exception"
| `Toomuch -> "too much"
| `Msg m -> m
let rec read_sock db c fd = let rec read_sock db c fd =
let open Vmm_wire in let open Vmm_wire in
Logs.debug (fun m -> m "reading now (socket read %d, socket sent %d, tcp sent %d)" !socket_read !socket_sent !tcp_sent);
Vmm_lwt.read_exactly c >>= function Vmm_lwt.read_exactly c >>= function
| Error _ -> Lwt.return_unit | Error e ->
Logs.err (fun m -> m "error %s while reading" (str_of_e e)) ;
Lwt.return_unit
| Ok (hdr, data) -> | Ok (hdr, data) ->
Logs.debug (fun m -> m "%d read %d data" hdr.id (String.length data)) ;
socket_read := 8 (* hdr *) + String.length data + !socket_read ;
if not (version_eq hdr.version my_version) then begin if not (version_eq hdr.version my_version) then begin
Logs.err (fun m -> m "unknown wire protocol version") ; Lwt.return_unit Logs.err (fun m -> m "unknown wire protocol version") ;
Lwt.return_unit
end else end else
let name = IM.find hdr.id !req in let name = IM.find hdr.id !req in
Logs.debug (fun m -> m "talking about %s (socket read %d, socket sent %d, tcp sent %d)" name !socket_read !socket_sent !tcp_sent) ;
req := IM.remove hdr.id !req ; req := IM.remove hdr.id !req ;
match Stats.int_to_op hdr.tag with match Stats.int_to_op hdr.tag with
| Some Stats.Stat_reply -> | Some Stats.Stat_reply ->
@ -168,10 +185,15 @@ let rec read_sock db c fd =
let vmm = P.encode_vmm name vmm in let vmm = P.encode_vmm name vmm in
let taps = List.map (P.encode_if name) ifs in let taps = List.map (P.encode_if name) ifs in
let out = String.concat ~sep:"\n" (ru :: vmm :: taps @ [ "" ]) in let out = String.concat ~sep:"\n" (ru :: vmm :: taps @ [ "" ]) in
Logs.info (fun m -> m "result: %s" out) ; Logs.info (fun m -> m "%d writing for %s via tcp %d (total read %d, tcp send %d)" hdr.id name (String.length out) !socket_read !tcp_sent) ;
Vmm_lwt.write_raw fd out >>= function Vmm_lwt.write_raw fd out >>= function
| Ok () -> read_sock db c fd | Ok () ->
| Error _ -> invalid_arg "failed to write via TCP" tcp_sent := String.length out + !tcp_sent ;
Logs.debug (fun m -> m "%d successfully wrote, tcp_sent now %d" hdr.id !tcp_sent) ;
read_sock db c fd
| Error e ->
Logs.err (fun m -> m "%d error %s while writing (tcp_sent %d)" hdr.id (str_of_e e) !tcp_sent) ;
invalid_arg "failed to write via TCP"
end end
| _ when hdr.tag = fail_tag -> | _ when hdr.tag = fail_tag ->
Logs.err (fun m -> m "failed to retrieve statistics for %s" name) ; Logs.err (fun m -> m "failed to retrieve statistics for %s" name) ;
@ -181,16 +203,24 @@ let rec read_sock db c fd =
read_sock db c fd read_sock db c fd
let rec query_sock prefix db c interval = let rec query_sock prefix db c interval =
Logs.debug (fun m -> m "querying socket (socket_send %d socket_read %d tcp_send %d)"
!socket_sent !socket_read !tcp_sent) ;
(* query c for everyone in db *) (* query c for everyone in db *)
Lwt_list.iter_s (fun (id, name) -> Lwt_list.iter_s (fun (id, name) ->
let id = identifier id in let id = identifier id in
let id = match prefix with None -> id | Some p -> p ^ "." ^ id in let id = match prefix with None -> id | Some p -> p ^ "." ^ id in
let request = Vmm_wire.Stats.stat !command my_version id in let request = Vmm_wire.Stats.stat !command my_version id in
Logs.debug (fun m -> m "req for %s (command %d) len %d (total %d)" id !command (String.length request) !socket_sent) ;
req := IM.add !command name !req ; req := IM.add !command name !req ;
incr command ; incr command ;
socket_sent := !socket_sent + String.length request ;
Vmm_lwt.write_raw c request >>= function Vmm_lwt.write_raw c request >>= function
| Ok () -> Lwt.return_unit | Ok () ->
| Error _ -> Lwt.fail_with "exception while writing") Logs.debug (fun m -> m "req for %s (command+1 %d) written (total %d)" id !command !socket_sent) ;
Lwt.return_unit
| Error e ->
Logs.err (fun m -> m "error while writing %s (command+1 %d): %s" id !command (str_of_e e)) ;
Lwt.fail_with "exception while writing")
db >>= fun () -> db >>= fun () ->
Lwt_unix.sleep (float_of_int interval) >>= fun () -> Lwt_unix.sleep (float_of_int interval) >>= fun () ->
query_sock prefix db c interval query_sock prefix db c interval