Harald Welte | 5882a9b | 2011-02-09 13:12:46 +0100 | [diff] [blame^] | 1 | %% -*- erlang -*- |
| 2 | %% ------------------------------------------------------------------- |
| 3 | %% |
| 4 | %% nodetool: Helper Script for interacting with live nodes |
| 5 | %% |
| 6 | %% ------------------------------------------------------------------- |
| 7 | |
| 8 | main(Args) -> |
| 9 | %% Extract the args |
| 10 | {RestArgs, TargetNode} = process_args(Args, [], undefined), |
| 11 | |
| 12 | %% See if the node is currently running -- if it's not, we'll bail |
| 13 | case {net_kernel:hidden_connect_node(TargetNode), net_adm:ping(TargetNode)} of |
| 14 | {true, pong} -> |
| 15 | ok; |
| 16 | {_, pang} -> |
| 17 | io:format("Node ~p not responding to pings.\n", [TargetNode]), |
| 18 | halt(1) |
| 19 | end, |
| 20 | |
| 21 | case RestArgs of |
| 22 | ["ping"] -> |
| 23 | %% If we got this far, the node already responsed to a ping, so just dump |
| 24 | %% a "pong" |
| 25 | io:format("pong\n"); |
| 26 | ["stop"] -> |
| 27 | io:format("~p\n", [rpc:call(TargetNode, init, stop, [], 60000)]); |
| 28 | ["restart"] -> |
| 29 | io:format("~p\n", [rpc:call(TargetNode, init, restart, [], 60000)]); |
| 30 | ["reboot"] -> |
| 31 | io:format("~p\n", [rpc:call(TargetNode, init, reboot, [], 60000)]); |
| 32 | ["rpc", Module, Function | RpcArgs] -> |
| 33 | case rpc:call(TargetNode, list_to_atom(Module), list_to_atom(Function), [RpcArgs], 60000) of |
| 34 | ok -> |
| 35 | ok; |
| 36 | {badrpc, Reason} -> |
| 37 | io:format("RPC to ~p failed: ~p\n", [TargetNode, Reason]), |
| 38 | halt(1); |
| 39 | _ -> |
| 40 | halt(1) |
| 41 | end; |
| 42 | Other -> |
| 43 | io:format("Other: ~p\n", [Other]), |
| 44 | io:format("Usage: nodetool {ping|stop|restart|reboot}\n") |
| 45 | end, |
| 46 | net_kernel:stop(). |
| 47 | |
| 48 | process_args([], Acc, TargetNode) -> |
| 49 | {lists:reverse(Acc), TargetNode}; |
| 50 | process_args(["-setcookie", Cookie | Rest], Acc, TargetNode) -> |
| 51 | erlang:set_cookie(node(), list_to_atom(Cookie)), |
| 52 | process_args(Rest, Acc, TargetNode); |
| 53 | process_args(["-name", TargetName | Rest], Acc, _) -> |
| 54 | ThisNode = append_node_suffix(TargetName, "_maint_"), |
| 55 | {ok, _} = net_kernel:start([ThisNode, longnames]), |
| 56 | process_args(Rest, Acc, nodename(TargetName)); |
| 57 | process_args(["-sname", TargetName | Rest], Acc, _) -> |
| 58 | ThisNode = append_node_suffix(TargetName, "_maint_"), |
| 59 | {ok, _} = net_kernel:start([ThisNode, shortnames]), |
| 60 | process_args(Rest, Acc, nodename(TargetName)); |
| 61 | process_args([Arg | Rest], Acc, Opts) -> |
| 62 | process_args(Rest, [Arg | Acc], Opts). |
| 63 | |
| 64 | |
| 65 | nodename(Name) -> |
| 66 | case string:tokens(Name, "@") of |
| 67 | [_Node, _Host] -> |
| 68 | list_to_atom(Name); |
| 69 | [Node] -> |
| 70 | [_, Host] = string:tokens(atom_to_list(node()), "@"), |
| 71 | list_to_atom(lists:concat([Node, "@", Host])) |
| 72 | end. |
| 73 | |
| 74 | append_node_suffix(Name, Suffix) -> |
| 75 | case string:tokens(Name, "@") of |
| 76 | [Node, Host] -> |
| 77 | list_to_atom(lists:concat([Node, Suffix, os:getpid(), "@", Host])); |
| 78 | [Node] -> |
| 79 | list_to_atom(lists:concat([Node, Suffix, os:getpid()])) |
| 80 | end. |