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Turning On and Off Quotas for Container
The parameter that controls the second-level disk quotas is QUOTAUGIDLIMIT
in the Container configuration file. By default, the value of this
parameter is zero and this corresponds to disabled per-user/group
quotas.
If you assign a non-zero value to the QUOTAUGIDLIMIT parameter, this action brings about the two following results:
- Second-level (per-user and per-group) disk quotas are enabled for the given Container;
- The value that you assign to this parameter will be the limit for the number of file owners and groups of this Container, including Linux system users. Note that you will theoretically be able to create extra users of this Container, but if the number of file owners inside the Container has already reached the limit, these users will not be able to own files.
Enabling per-user/group quotas for a Container requires restarting
the Container. The value for it should be carefully chosen; the bigger
value you set, the bigger kernel memory overhead this Container creates.
This value must be greater than or equal to the number of entries in
the Container /etc/passwd and /etc/group
files. Taking into account that a newly created Red Hat Linux-based CT
has about 80 entries in total, the typical value would be 100. However,
for Containers with a large number of users this value may be increased.
The session below turns on second-level quotas for Container 101:
# vzctl set 101 --quotaugidlimit 100 --save Unable to apply new quota values: ugid quota not initialized Saved parameters for CT 101 # vzctl restart 101 Restarting container Stopping container ... Container was stopped Container is unmounted Starting container ... Container is mounted Adding IP address(es): 192.168.16.123 Setting CPU units: 1000 Configure meminfo: 65536 File resolv.conf was modified Container start in progress...
