306 lines
11 KiB
OCaml
306 lines
11 KiB
OCaml
(* (c) 2018 Hannes Mehnert, all rights reserved *)
|
|
|
|
open Lwt.Infix
|
|
|
|
open Astring
|
|
|
|
open Vmm_core
|
|
open Vmm_core.Stats
|
|
|
|
|
|
(*
|
|
line protocol:
|
|
```
|
|
<measurement>[,<tag_key>=<tag_value>[,<tag_key>=<tag_value>]] \
|
|
<field_key>=<field_value>[,<field_key>=<field_value>] [<timestamp>]
|
|
```
|
|
|
|
(measurement, tag_key, tag_value, field_key are all strings, index over tags)
|
|
|
|
* Quoting
|
|
|
|
Element Double quotes Single quotes
|
|
---------------------------------------------
|
|
Timestamp Never Never
|
|
Measurements, tag keys, tag values, field keys Never* Never*
|
|
Field values Double quote string field values. Do not double quote floats,
|
|
integers, or Booleans. Never
|
|
|
|
*=Line Protocol allows users to double and single quote measurement names, tag
|
|
keys, tag values, and field keys. It will, however, assume that the double or
|
|
single quotes are part of the name, key, or value. This can complicate query
|
|
syntax (see the example below).
|
|
|
|
|
|
Float IEEE-754 64-bit floating-point numbers. This is the default numerical
|
|
type. Examples: 1, 1.0, 1.e+78, 1.E+78.
|
|
Integer Signed 64-bit integers (-9223372036854775808 to 9223372036854775807).
|
|
Specify an integer with a trailing i on the number. Example: 1i.
|
|
|
|
For tag keys, tag values, and field keys always use a backslash character \ to
|
|
escape:
|
|
|
|
commas ,
|
|
equal signs =
|
|
spaces
|
|
|
|
For measurements always use a backslash character \ to escape:
|
|
|
|
commas ,
|
|
spaces
|
|
|
|
For string field values use a backslash character \ to escape:
|
|
|
|
double quotes ""
|
|
|
|
Line Protocol does not require users to escape the backslash character \. Users
|
|
do not need to escape all other special characters.
|
|
|
|
do not use any keywords:
|
|
ALL ALTER ANY AS ASC BEGIN
|
|
BY CREATE CONTINUOUS DATABASE DATABASES DEFAULT
|
|
DELETE DESC DESTINATIONS DIAGNOSTICS DISTINCT DROP
|
|
DURATION END EVERY EXPLAIN FIELD FOR
|
|
FROM GRANT GRANTS GROUP GROUPS IN
|
|
INF INSERT INTO KEY KEYS KILL
|
|
LIMIT SHOW MEASUREMENT MEASUREMENTS NAME OFFSET
|
|
ON ORDER PASSWORD POLICY POLICIES PRIVILEGES
|
|
QUERIES QUERY READ REPLICATION RESAMPLE RETENTION
|
|
REVOKE SELECT SERIES SET SHARD SHARDS
|
|
SLIMIT SOFFSET STATS SUBSCRIPTION SUBSCRIPTIONS TAG
|
|
TO USER USERS VALUES WHERE WITH
|
|
WRITE
|
|
*)
|
|
|
|
module P = struct
|
|
let tv (sec, usec) = Printf.sprintf "%Lu.%06d" sec usec
|
|
|
|
let i64 i = Printf.sprintf "%Lui" i
|
|
|
|
let encode_ru vm ru =
|
|
let fields =
|
|
[ "utime", tv ru.utime ;
|
|
"stime", tv ru.stime ;
|
|
"maxrss", i64 ru.maxrss ;
|
|
"ixrss", i64 ru.ixrss ;
|
|
"idrss", i64 ru.idrss ;
|
|
"isrss", i64 ru.isrss ;
|
|
"minflt", i64 ru.minflt ;
|
|
"maxflt", i64 ru.majflt ;
|
|
"nswap", i64 ru.nswap ;
|
|
"inblock", i64 ru.inblock ;
|
|
"outblock", i64 ru.outblock ;
|
|
"msgsnd", i64 ru.msgsnd ;
|
|
"msgrcv", i64 ru.msgrcv ;
|
|
"nsignals", i64 ru.nsignals ;
|
|
"nvcsw", i64 ru.nvcsw ;
|
|
"nivcsw", i64 ru.nivcsw
|
|
]
|
|
in
|
|
let fields = List.map (fun (k, v) -> k ^ "=" ^ v) fields in
|
|
Printf.sprintf "resource_usage,vm=%s %s" vm (String.concat ~sep:"," fields)
|
|
|
|
let encode_kinfo_mem vm mem =
|
|
let fields =
|
|
[ "vsize", i64 mem.vsize ;
|
|
"rss", i64 mem.rss ;
|
|
"tsize", i64 mem.tsize ;
|
|
"dsize", i64 mem.dsize ;
|
|
"ssize", i64 mem.ssize ;
|
|
"cow_fauls", string_of_int mem.cow ;
|
|
"runtime", i64 mem.runtime ;
|
|
"start", tv mem.start ;
|
|
]
|
|
in
|
|
let fields = List.map (fun (k, v) -> k ^ "=" ^ v) fields in
|
|
Printf.sprintf "kinfo_mem,vm=%s %s" vm (String.concat ~sep:"," fields)
|
|
|
|
let encode_vmm vm xs =
|
|
let escape s =
|
|
let cutted = String.cuts ~sep:"," s in
|
|
let cutted = String.concat ~sep:"\\," cutted in
|
|
let cutted = String.cuts ~sep:" " cutted in
|
|
let cutted = String.concat ~sep:"\\ " cutted in
|
|
let cutted = String.cuts ~sep:"=" cutted in
|
|
String.concat ~sep:"\\=" cutted
|
|
in
|
|
Printf.sprintf "vmm,vm=%s %s" vm
|
|
(String.concat ~sep:","
|
|
(List.map (fun (k, v) -> (escape k) ^ "=" ^ (i64 v)) xs))
|
|
|
|
let i32 i = Printf.sprintf "%lui" i
|
|
|
|
let encode_if vm ifd =
|
|
let fields =
|
|
(* TODO: flags *)
|
|
[ "send_queue_length", i32 ifd.send_length ;
|
|
"max_send_queue_length", i32 ifd.max_send_length ;
|
|
"send_queue_drops", i32 ifd.send_drops ;
|
|
"mtu", i32 ifd.mtu ;
|
|
"baudrate", i64 ifd.baudrate ;
|
|
"vm_to_host_packets", i64 ifd.input_packets ;
|
|
"vm_to_host_errors", i64 ifd.input_errors ;
|
|
"vm_to_host_bytes", i64 ifd.input_bytes ;
|
|
"vm_to_host_mcast", i64 ifd.input_mcast ;
|
|
"vm_to_host_dropped", i64 ifd.input_dropped ;
|
|
"collisions", i64 ifd.collisions ;
|
|
"host_to_vm_packets", i64 ifd.output_packets ;
|
|
"host_to_vm_errors", i64 ifd.output_errors ;
|
|
"host_to_vm_bytes", i64 ifd.output_bytes ;
|
|
"host_to_vm_mcast", i64 ifd.output_mcast ;
|
|
"host_to_vm_dropped", i64 ifd.output_dropped
|
|
]
|
|
in
|
|
let fields = List.map (fun (k, v) -> k ^ "=" ^ v) fields in
|
|
Printf.sprintf "interface,vm=%s,bridge=%s %s"
|
|
vm ifd.bridge (String.concat ~sep:"," fields)
|
|
end
|
|
|
|
let command = ref 1L
|
|
|
|
let str_of_e = function
|
|
| `Eof -> "end of file"
|
|
| `Exception -> "exception"
|
|
| `Toomuch -> "too much"
|
|
| `Msg m -> m
|
|
|
|
(* how many times did I write this now? *)
|
|
let safe_close s =
|
|
Lwt.catch
|
|
(fun () -> Lwt_unix.close s)
|
|
(fun e ->
|
|
Logs.err (fun m -> m "exception %s while closing" (Printexc.to_string e)) ;
|
|
Lwt.return_unit)
|
|
|
|
let rec read_sock_write_tcp drop c ?fd addr =
|
|
match fd with
|
|
| None ->
|
|
begin
|
|
Logs.debug (fun m -> m "new connection to TCP") ;
|
|
Vmm_lwt.connect Lwt_unix.PF_INET addr >>= function
|
|
| None ->
|
|
Logs.warn (fun m -> m "error connecting to influxd %a, retrying in 5s"
|
|
Vmm_lwt.pp_sockaddr addr);
|
|
Lwt_unix.sleep 5.0 >>= fun () ->
|
|
read_sock_write_tcp drop c addr
|
|
| Some fd ->
|
|
Lwt_unix.setsockopt fd Lwt_unix.SO_KEEPALIVE true ;
|
|
read_sock_write_tcp drop c ~fd addr
|
|
end
|
|
| Some fd ->
|
|
Logs.debug (fun m -> m "reading from unix socket") ;
|
|
Vmm_lwt.read_wire c >>= function
|
|
| Error e ->
|
|
Logs.err (fun m -> m "error %s while reading vmm socket (return)"
|
|
(str_of_e e)) ;
|
|
safe_close fd >>= fun () ->
|
|
safe_close c >|= fun () ->
|
|
true
|
|
| Ok (hdr, `Data (`Stats_data (ru, mem, vmm, ifs))) ->
|
|
let name =
|
|
let orig = hdr.Vmm_commands.name
|
|
and f = if drop then Name.drop_front else (fun a -> a)
|
|
in
|
|
let n = f orig in
|
|
let safe = if Name.is_root n then orig else n in
|
|
Name.to_string safe
|
|
in
|
|
let ru = P.encode_ru name ru in
|
|
let mem = match mem with None -> [] | Some m -> [ P.encode_kinfo_mem name m ] in
|
|
let vmm = match vmm with None -> [] | Some vmm -> [ P.encode_vmm name vmm ] in
|
|
let taps = List.map (P.encode_if name) ifs in
|
|
let out = (String.concat ~sep:"\n" (ru :: mem @ vmm @ taps)) ^ "\n" in
|
|
Logs.debug (fun m -> m "writing %d via tcp" (String.length out)) ;
|
|
begin
|
|
Vmm_lwt.write_raw fd (Bytes.unsafe_of_string out) >>= function
|
|
| Ok () ->
|
|
Logs.debug (fun m -> m "wrote successfully") ;
|
|
read_sock_write_tcp drop c ~fd addr
|
|
| Error e ->
|
|
Logs.err (fun m -> m "error %s while writing to tcp (%s)"
|
|
(str_of_e e) name) ;
|
|
safe_close fd >|= fun () ->
|
|
false
|
|
end
|
|
| Ok wire ->
|
|
Logs.warn (fun m -> m "ignoring %a" Vmm_commands.pp_wire wire) ;
|
|
Lwt.return (Some fd) >>= fun fd ->
|
|
read_sock_write_tcp drop c ?fd addr
|
|
|
|
let query_sock vm c =
|
|
let header = Vmm_commands.header ~sequence:!command vm in
|
|
command := Int64.succ !command ;
|
|
Logs.debug (fun m -> m "%Lu requesting %a via socket" !command Name.pp vm) ;
|
|
Vmm_lwt.write_wire c (header, `Command (`Stats_cmd `Stats_subscribe))
|
|
|
|
let rec maybe_connect () =
|
|
let sockaddr = Lwt_unix.ADDR_UNIX (socket_path `Stats) in
|
|
Logs.debug (fun m -> m "connecting to %a" Vmm_lwt.pp_sockaddr sockaddr);
|
|
Vmm_lwt.connect Lwt_unix.PF_UNIX sockaddr >>= function
|
|
| None ->
|
|
Logs.warn (fun m -> m "error connecting to socket %a" Vmm_lwt.pp_sockaddr sockaddr);
|
|
Lwt_unix.sleep 5. >>= fun () ->
|
|
maybe_connect ()
|
|
| Some c ->
|
|
Logs.debug (fun m -> m "connected");
|
|
Lwt.return c
|
|
|
|
let client influx vm drop =
|
|
match influx with
|
|
| None -> Lwt.return (Error (`Msg "influx host not provided"))
|
|
| Some (ip, port) ->
|
|
let addr = Lwt_unix.ADDR_INET (Ipaddr_unix.V4.to_inet_addr ip, port) in
|
|
|
|
(* loop *)
|
|
(* the query task queries the stat_socket at each
|
|
- if this fails, closing is set to true (and unit is returned)
|
|
|
|
the read_sock reads the stat_socket, and forwards to a TCP socket
|
|
- if closing is true, the TCP socket is closed and unit is returned
|
|
- if read on the unix domain socket fails, closing is set to true
|
|
(and unit is returned) *)
|
|
(* connection to the unix domain socket is managed in this loop only:
|
|
- maybe_connect attempts to establishes to it
|
|
- query_sock/read_sock_write_tcp write an read from it
|
|
- on failure in read or write, the TCP connection is closed, and loop
|
|
takes control: safe_close, maybe_connect, rinse, repeat *)
|
|
|
|
let rec loop () =
|
|
(* start a socket connection to vmm_stats *)
|
|
maybe_connect () >>= fun c ->
|
|
query_sock vm c >>= function
|
|
| Error e ->
|
|
let err =
|
|
Rresult.R.error_msgf "error %s while writing to stat socket" (str_of_e e)
|
|
in
|
|
Lwt.return err
|
|
| Ok () ->
|
|
read_sock_write_tcp drop c addr >>= fun restart ->
|
|
if restart then loop () else Lwt.return (Ok ())
|
|
in
|
|
loop ()
|
|
|
|
let run_client _ influx vm drop =
|
|
Sys.(set_signal sigpipe Signal_ignore) ;
|
|
Lwt_main.run (client influx vm drop)
|
|
|
|
open Cmdliner
|
|
open Albatross_cli
|
|
|
|
let drop_label =
|
|
let doc = "Drop leftmost label" in
|
|
Arg.(value & flag & info [ "drop-label" ] ~doc)
|
|
|
|
let cmd =
|
|
let doc = "Albatross Influx connector" in
|
|
let man = [
|
|
`S "DESCRIPTION" ;
|
|
`P "$(tname) connects to a albatross stats socket, pulls statistics and pushes them via TCP to influxdb" ]
|
|
in
|
|
Term.(term_result (const run_client $ setup_log $ influx $ opt_vm_name $ drop_label)),
|
|
Term.info "albatross_influx" ~version ~doc ~man
|
|
|
|
let () =
|
|
match Term.eval cmd
|
|
with `Error _ -> exit 1 | _ -> exit 0
|