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