mirror of
https://github.com/correl/rebar.git
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81 lines
2.9 KiB
Text
81 lines
2.9 KiB
Text
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%% -*- erlang -*-
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%% -------------------------------------------------------------------
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%%
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%% nodetool: Helper Script for interacting with live nodes
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%%
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%% -------------------------------------------------------------------
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main(Args) ->
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%% Extract the args
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{RestArgs, TargetNode} = process_args(Args, [], undefined),
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%% See if the node is currently running -- if it's not, we'll bail
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case net_adm:ping(TargetNode) of
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pong ->
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ok;
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pang ->
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io:format("Node ~p not responding to pings.\n", [TargetNode]),
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halt(1)
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end,
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case RestArgs of
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["ping"] ->
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%% If we got this far, the node already responsed to a ping, so just dump
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%% a "pong"
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io:format("pong\n");
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["stop"] ->
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io:format("~p\n", [rpc:call(TargetNode, init, stop, [], 60000)]);
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["restart"] ->
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io:format("~p\n", [rpc:call(TargetNode, init, restart, [], 60000)]);
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["reboot"] ->
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io:format("~p\n", [rpc:call(TargetNode, init, reboot, [], 60000)]);
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["rpc", Module, Function | RpcArgs] ->
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case rpc:call(TargetNode, list_to_atom(Module), list_to_atom(Function), [RpcArgs], 60000) of
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ok ->
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ok;
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{badrpc, Reason} ->
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io:format("RPC to ~p failed: ~p\n", [TargetNode, Reason]),
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halt(1);
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_ ->
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halt(1)
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end;
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Other ->
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io:format("Other: ~p\n", [Other]),
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io:format("Usage: nodetool {ping|stop|restart|reboot}\n")
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end,
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net_kernel:stop().
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process_args([], Acc, TargetNode) ->
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{lists:reverse(Acc), TargetNode};
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process_args(["-setcookie", Cookie | Rest], Acc, TargetNode) ->
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erlang:set_cookie(node(), list_to_atom(Cookie)),
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process_args(Rest, Acc, TargetNode);
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process_args(["-name", TargetName | Rest], Acc, _) ->
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ThisNode = append_node_suffix(TargetName, "_maint_"),
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{ok, _} = net_kernel:start([ThisNode, longnames]),
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process_args(Rest, Acc, nodename(TargetName));
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process_args(["-sname", TargetName | Rest], Acc, _) ->
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ThisNode = append_node_suffix(TargetName, "_maint_"),
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{ok, _} = net_kernel:start([ThisNode, shortnames]),
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process_args(Rest, Acc, nodename(TargetName));
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process_args([Arg | Rest], Acc, Opts) ->
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process_args(Rest, [Arg | Acc], Opts).
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nodename(Name) ->
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case string:tokens(Name, "@") of
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[_Node, _Host] ->
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list_to_atom(Name);
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[Node] ->
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[_, Host] = string:tokens(atom_to_list(node()), "@"),
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list_to_atom(lists:concat([Node, "@", Host]))
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end.
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append_node_suffix(Name, Suffix) ->
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case string:tokens(Name, "@") of
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[Node, Host] ->
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list_to_atom(lists:concat([Node, Suffix, os:getpid(), "@", Host]));
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[Node] ->
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list_to_atom(lists:concat([Node, Suffix, os:getpid()]))
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end.
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