Revert vm args in emqx conf b (#2070)

* Revert changes in emqx.conf for backward compatibility

etc/emqx.conf

@@ -160,6 +160,99 @@ node.name = emqx@127.0.0.1
 ## Value: String
 node.cookie = emqxsecretcookie
 
+## Heartbeat monitoring of an Erlang runtime system. Comment the line to disable
+## heartbeat, or set the value as 'on'
+##
+## Value: on
+##
+## vm.args: -heart
+## node.heartbeat = on
+
+## Sets the number of threads in async thread pool. Valid range is 0-1024.
+##
+## See: http://erlang.org/doc/man/erl.html
+##
+## Value: 0-1024
+##
+## vm.args: +A Number
+node.async_threads = 32
+
+## Sets the maximum number of simultaneously existing processes for this
+## system if a Number is passed as value.
+##
+## See: http://erlang.org/doc/man/erl.html
+##
+## Value: Number [1024-134217727]
+##
+## vm.args: +P Number
+node.process_limit = 2048000
+
+## Sets the maximum number of simultaneously existing ports for this system.
+##
+## See: http://erlang.org/doc/man/erl.html
+##
+## Value: Number [1024-134217727]
+##
+## vm.args: +Q Number
+node.max_ports = 1024000
+
+## Set the distribution buffer busy limit (dist_buf_busy_limit).
+##
+## See: http://erlang.org/doc/man/erl.html
+##
+## Value: Number [1KB-2GB]
+##
+## vm.args: +zdbbl size
+node.dist_buffer_size = 8MB
+
+## Sets the maximum number of ETS tables. Note that mnesia and SSL will
+## create temporary ETS tables.
+##
+## Value: Number
+##
+## vm.args: +e Number
+node.max_ets_tables = 256000
+
+## Tweak GC to run more often.
+##
+## Value: Number [0-65535]
+##
+## vm.args: -env ERL_FULLSWEEP_AFTER Number
+node.fullsweep_after = 1000
+
+## Crash dump log file.
+##
+## Value: Log file
+node.crash_dump = {{ platform_log_dir }}/crash.dump
+
+## Specify the erlang distributed protocol.
+##
+## Value: Enum
+##  - inet_tcp: the default; handles TCP streams with IPv4 addressing.
+##  - inet6_tcp: handles TCP with IPv6 addressing.
+##  - inet_tls: using TLS for Erlang Distribution.
+##
+## vm.args: -proto_dist inet_tcp
+node.proto_dist = inet_tcp
+
+## Specify SSL Options in the file if using SSL for Erlang Distribution.
+##
+## Value: File
+##
+## vm.args: -ssl_dist_optfile <File>
+## node.ssl_dist_optfile = {{ platform_etc_dir }}/ssl_dist.conf
+
+## Sets the net_kernel tick time. TickTime is specified in seconds.
+## Notice that all communicating nodes are to have the same TickTime
+## value specified.
+##
+## See: http://www.erlang.org/doc/man/kernel_app.html#net_ticktime
+##
+## Value: Number
+##
+## vm.args: -kernel net_ticktime Number
+node.dist_net_ticktime = 60
+
 ## Sets the port range for the listener socket of a distributed Erlang node.
 ## Note that if there are firewalls between clustered nodes, this port segment
 ## for nodes’ communication should be allowed.

etc/vm.args

@@ -10,19 +10,19 @@
 ## such as `node.name` for `-name` and `node.cooke` for `-setcookie`.
 
 ## Sets the maximum number of simultaneously existing processes for this system.
-+P 256000
+#+P 2048000
 
 ## Sets the maximum number of simultaneously existing ports for this system.
-+Q 262144
+#+Q 1024000
 
 ## Sets the maximum number of ETS tables
-+e 256000
+#+e 256000
 
 ## Sets the maximum number of atoms the virtual machine can handle.
 #+t 1048576
 
 ## Set the location of crash dumps
--env ERL_CRASH_DUMP {{ platform_log_dir }}/crash.dump
+#-env ERL_CRASH_DUMP {{ platform_log_dir }}/crash.dump
 
 ## Set how many times generational garbages collections can be done without
 ## forcing a fullsweep collection.
@@ -46,13 +46,13 @@
 #-kernel net_ticktime 60
 
 ## Sets the distribution buffer busy limit (dist_buf_busy_limit).
-+zdbbl 8192
+#+zdbbl 8192
 
 ## Sets default scheduler hint for port parallelism.
 +spp true
 
 ## Sets the number of threads in async thread pool. Valid range is 0-1024.
-+A 8
+#+A 8
 
 ## Sets the default heap size of processes to the size Size.
 #+hms 233

priv/emqx.schema

@@ -173,11 +173,125 @@ end}.
   {default, "emqx@127.0.0.1"}
 ]}.
 
+%% @doc The erlang distributed protocol
+{mapping, "node.proto_dist", "vm_args.-proto_dist", [
+  %{default, "inet_tcp"},
+  {datatype, {enum, [inet_tcp, inet6_tcp, inet_tls]}},
+  hidden
+]}.
+
+%% @doc Specify SSL Options in the file if using SSL for erlang distribution
+{mapping, "node.ssl_dist_optfile", "vm_args.-ssl_dist_optfile", [
+  {datatype, string},
+  hidden
+]}.
+
 %% @doc Secret cookie for distributed erlang node
 {mapping, "node.cookie", "vm_args.-setcookie", [
   {default, "emqxsecretcookie"}
 ]}.
 
+%% @doc http://erlang.org/doc/man/heart.html
+{mapping, "node.heartbeat", "vm_args.-heart", [
+  {datatype, flag},
+  hidden
+]}.
+
+{translation, "vm_args.-heart", fun(Conf) ->
+    case cuttlefish:conf_get("node.heartbeat", Conf) of
+        true  -> "";
+        false -> cuttlefish:invalid("should be 'on' or comment the line!")
+    end
+end}.
+
+%% @doc More information at: http://erlang.org/doc/man/erl.html
+{mapping, "node.async_threads", "vm_args.+A", [
+  {default, 64},
+  {datatype, integer},
+  {validators, ["range:0-1024"]}
+]}.
+
+%% @doc Erlang Process Limit
+{mapping, "node.process_limit", "vm_args.+P", [
+  {datatype, integer},
+  {default, 256000},
+  hidden
+]}.
+
+%% Note: OTP R15 and earlier uses -env ERL_MAX_PORTS, R16+ uses +Q
+%% @doc The number of concurrent ports/sockets
+%% Valid range is 1024-134217727
+{mapping, "node.max_ports",
+  cuttlefish:otp("R16", "vm_args.+Q", "vm_args.-env ERL_MAX_PORTS"), [
+  {default, 262144},
+  {datatype, integer},
+  {validators, ["range4ports"]}
+]}.
+
+{validator, "range4ports", "must be 1024 to 134217727",
+ fun(X) -> X >= 1024 andalso X =< 134217727 end}.
+
+%% @doc http://www.erlang.org/doc/man/erl.html#%2bzdbbl
+{mapping, "node.dist_buffer_size", "vm_args.+zdbbl", [
+  {datatype, bytesize},
+  {commented, "32MB"},
+  hidden,
+  {validators, ["zdbbl_range"]}
+]}.
+
+{translation, "vm_args.+zdbbl",
+ fun(Conf) ->
+  ZDBBL = cuttlefish:conf_get("node.dist_buffer_size", Conf, undefined),
+  case ZDBBL of
+    undefined -> undefined;
+    X when is_integer(X) -> cuttlefish_util:ceiling(X / 1024); %% Bytes to Kilobytes;
+    _ -> undefined
+  end
+ end
+}.
+
+{validator, "zdbbl_range", "must be between 1KB and 2097151KB",
+ fun(ZDBBL) ->
+  %% 2097151KB = 2147482624
+  ZDBBL >= 1024 andalso ZDBBL =< 2147482624
+ end
+}.
+
+%% @doc http://www.erlang.org/doc/man/erlang.html#system_flag-2
+{mapping, "node.fullsweep_after", "vm_args.-env ERL_FULLSWEEP_AFTER", [
+  {default, 1000},
+  {datatype, integer},
+  hidden,
+  {validators, ["positive_integer"]}
+]}.
+
+{validator, "positive_integer", "must be a positive integer",
+  fun(X) -> X >= 0 end}.
+
+%% Note: OTP R15 and earlier uses -env ERL_MAX_ETS_TABLES,
+%% R16+ uses +e
+%% @doc The ETS table limit
+{mapping, "node.max_ets_tables",
+  cuttlefish:otp("R16", "vm_args.+e", "vm_args.-env ERL_MAX_ETS_TABLES"), [
+  {default, 256000},
+  {datatype, integer},
+  hidden
+]}.
+
+%% @doc Set the location of crash dumps
+{mapping, "node.crash_dump", "vm_args.-env ERL_CRASH_DUMP", [
+  {default, "{{crash_dump}}"},
+  {datatype, file},
+  hidden
+]}.
+
+%% @doc http://www.erlang.org/doc/man/kernel_app.html#net_ticktime
+{mapping, "node.dist_net_ticktime", "vm_args.-kernel net_ticktime", [
+  {commented, 60},
+  {datatype, integer},
+  hidden
+]}.
+
 %% @doc http://www.erlang.org/doc/man/kernel_app.html
 {mapping, "node.dist_listen_min", "kernel.inet_dist_listen_min", [
   {commented, 6369},