Commit a24aed2a authored by Michael Hanselmann's avatar Michael Hanselmann
Browse files

gnt-cluster command: Add option to prepend node name to output

With this patch a new option (“-M”, like dsh) is added to “gnt-cluster
command” to prepend the node name to all output lines.

$ gnt-cluster command -M uname -a | grep Linux Linux [...] Linux [...]
Signed-off-by: default avatarMichael Hanselmann <>
Reviewed-by: default avatarIustin Pop <>
parent e9ed4f2e
......@@ -52,6 +52,10 @@ GROUPS_OPT = cli_option("--groups", default=False,
action="store_true", dest="groups",
help="Arguments are node groups instead of nodes")
SHOW_MACHINE_OPT = cli_option("-M", "--show-machine-names", default=False,
help="Show machine name for every line in output")
_EPO_PING_INTERVAL = 30 # 30 seconds between pings
_EPO_PING_TIMEOUT = 1 # 1 second
_EPO_REACHABLE_TIMEOUT = 15 * 60 # 15 minutes
......@@ -529,8 +533,12 @@ def RunClusterCommand(opts, args):
for name in nodes:
result = srun.Run(name, "root", command)
ToStdout("node: %s", name)
ToStdout("%s", result.output)
if opts.show_machine_names:
for line in result.output.splitlines():
ToStdout("%s: %s", name, line)
ToStdout("node: %s", name)
ToStdout("%s", result.output)
ToStdout("return code = %s", result.exit_code)
return 0
......@@ -1500,7 +1508,7 @@ commands = {
"[-n node...] <filename>", "Copies a file to all (or only some) nodes"),
"command": (
RunClusterCommand, [ArgCommand(min=1)],
"[-n node...] <command>", "Runs a command on all (or only some) nodes"),
"info": (
ShowClusterConfig, ARGS_NONE, [ROMAN_OPT],
......@@ -44,7 +44,7 @@ interpreted as stdin.
**command** [-n *node*] [-g *group*] {*command*}
**command** [-n *node*] [-g *group*] [-M] {*command*}
Executes a command on all nodes. If the option ``-n`` is not given,
the command will be executed on all nodes, otherwise it will be
......@@ -58,6 +58,9 @@ group, e.g.::
# gnt-cluster command -g default date
The ``-M`` option can be used to prepend the node name to all output
The command is executed serially on the selected nodes. If the
master node is present in the list, the command will be executed
last on the master. Regarding the other nodes, the execution order
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