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lxc-ls: Update lxc.group handling

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This introduces a new -g/--group argument to filter containers based on
their groups.

This supports the rather obvious: --group blah
Which will only list containers that are in group blah.

It may also be passed multiple times: --group blah --group bleh
Which will list containers that are in either (or both) blah or bleh.

And it also takes: --group blah,bleh --group doh
Which will list containers that are either in BOTH blah and bleh or in doh.

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Michael H. Warfield <mhw@WittsEnd.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
This commit is contained in:
Stéphane Graber 2014-05-01 18:35:21 -04:00
parent 50040b5e46
commit 0f027869da
2 changed files with 46 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
doc/lxc-ls.sgml.in
View File

@ -56,6 +56,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
<arg choice="opt">--stopped</arg>
<arg choice="opt">-f</arg>
<arg choice="opt">-F <replaceable>format</replaceable></arg>
<arg choice="opt">-g <replaceable>groups</replaceable></arg>
<arg choice="opt">--nesting</arg>
<arg choice="opt">filter</arg>
</cmdsynopsis>
@ -150,6 +151,18 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
</listitem>
</varlistentry>
<varlistentry>
<term>
<option><optional>-g, --groups <replaceable>groups</replaceable></optional></option>
</term>
<listitem>
<para>
Comma separated list of groups the container must have to be displayed.
The parameter may be passed multiple times.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option><optional>--nesting</optional></option>

39
src/lxc/lxc-ls.in
View File

@ -103,8 +103,8 @@ def get_root_path(path):
# Constants
FIELDS = ("name", "state", "interfaces", "ipv4", "ipv6", "autostart", "pid",
"memory", "ram", "swap")
DEFAULT_FIELDS = ("name", "state", "ipv4", "ipv6", "autostart")
"memory", "ram", "swap", "groups")
DEFAULT_FIELDS = ("name", "state", "ipv4", "ipv6", "groups", "autostart")
# Begin parsing the command line
parser = argparse.ArgumentParser(description=_("LXC: List containers"),
@ -141,6 +141,11 @@ parser.add_argument("-F", "--fancy-format", type=str,
default=",".join(DEFAULT_FIELDS),
help=_("comma separated list of fields to show"))
parser.add_argument("-g", "--groups", type=str, action="append",
metavar="GROUPS",
help=_("groups (comma separated) the container must "
"be a member of"))
parser.add_argument("--nesting", dest="nesting", action="store_true",
help=_("show nested containers"))
@ -189,6 +194,10 @@ if args.nesting:
parser.error(_("Showing nested containers requires setns to the "
"PID namespace which your kernel doesn't support."))
## Check that -g is passed alongside -f
if args.groups and not args.fancy:
parser.error(_("Group filtering requires fancy formatting."))
# Set the actual lxcpath value
if not args.lxcpath:
args.lxcpath = lxc.default_config_path
@ -229,6 +238,19 @@ def get_containers(fd=None, base="/", root=False):
except:
continue
if args.groups:
try:
set_has = set(container.get_config_item("lxc.group"))
except KeyError:
set_has = set()
for group in args.groups:
set_must = set(group.split(","))
if not set_must - set_has:
break
else:
continue
if container.controllable:
state = container.state
else:
@ -254,15 +276,20 @@ def get_containers(fd=None, base="/", root=False):
elif container.init_pid != -1:
entry['pid'] = str(container.init_pid)
if 'groups' in args.fancy_format:
entry['groups'] = "-"
try:
groups = container.get_config_item("lxc.group")
if len(groups) > 0:
entry['groups'] = ", ".join(groups)
except KeyError:
pass
if 'autostart' in args.fancy_format:
entry['autostart'] = "NO"
try:
if container.get_config_item("lxc.start.auto") == "1":
entry['autostart'] = "YES"
groups = container.get_config_item("lxc.group")
if len(groups) > 0:
entry['autostart'] = "YES (%s)" % ", ".join(groups)
except KeyError:
pass