The standard linux task list shows you each process and the resources (e.g. CPU, Memory) that they are consuming. However, if you run top on an OpenVZ host server, it doesn’t show you the container ID of each process.
Fortunately, there is a tool imaginatively named, vztop, which can show you a slightly more useful list of container and host processes, along with their container ID.
To install the vztop and vzps tools, just run the following command:
rpm -ivh http://download.openvz.org/contrib/utils/vzprocps-2.0.11-6.13.swsoft.i386.rpm
Once the utilities are installed, you can get a list of all processes running and their container ids with:
vztop -E -1
This will return a list of tasks like the following output:
13:07:09 up 3 days, 22:02, 3 users, load average: 0.26, 0.67, 2.41
358 processes: 357 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 0.4% user 0.3% system 0.0% nice 0.0% iowait 98.3% idle
CPU1 states: 0.1% user 0.2% system 0.0% nice 0.1% iowait 99.1% idle
CPU2 states: 0.1% user 0.3% system 0.0% nice 0.4% iowait 98.2% idle
CPU3 states: 1.0% user 0.3% system 0.0% nice 0.0% iowait 98.1% idle
Mem: 4150972k av, 2404600k used, 1746372k free, 0k shrd, 161888k buff
1269832k active, 489584k inactive
Swap: 2040244k av, 0k used, 2040244k free 992664k cached
PID USER PRI NI SIZE RSS SHARE VEID STAT %CPU %MEM TIME CPU COMMAND
375 root 15 0 5360 1832 780 0 S 0.9 0.0 1:09 2 iptraf
31693 root 16 0 2456 1188 792 0 S 0.5 0.0 0:10 0 top
12866 root 18 0 4728 1416 824 0 R 0.3 0.0 0:00 3 vztop
7042 zabbix 22 5 7164 484 280 N/A S N 0.1 0.0 10:33 0 zabbix_agentd
11014 root 15 0 10148 3036 2208 209 S 0.1 0.0 0:02 2 sshd
11015 root 15 0 9980 2864 2208 209 S 0.1 0.0 0:02 1 sshd
11019 root 18 0 6792 1884 1144 209 S 0.1 0.0 0:01 3 sftp-server
31333 root 16 0 10008 2828 2284 0 S 0.1 0.0 0:00 1 sshd
1 root 15 0 2064 628 540 N/A S 0.0 0.0 0:14 1 init
2 root RT -5 0 0 0 0 SW< 0.0 0.0 0:00 0 migration/0/0
3 root 39 19 0 0 0 0 SWN 0.0 0.0 0:00 0 ksoftirqd/0
4 root RT -5 0 0 0 0 SW< 0.0 0.0 0:00 1 migration/0/1
5 root 34 19 0 0 0 0 SWN 0.0 0.0 0:00 1 ksoftirqd/1
6 root RT -5 0 0 0 0 SW< 0.0 0.0 0:00 2 migration/0/2
7 root 34 19 0 0 0 0 SWN 0.0 0.0 0:00 2 ksoftirqd/2
8 root RT -5 0 0 0 0 SW< 0.0 0.0 0:00 3 migration/0/3
9 root 34 19 0 0 0 0 SWN 0.0 0.0 0:00 3 ksoftirqd/3
10 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:00 0 events/0
11 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:00 1 events/1
12 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:00 2 events/2
13 root 12 -5 0 0 0 0 SW< 0.0 0.0 0:00 3 events/3
14 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:03 3 khelper
15 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:00 0 kthread
21 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:00 0 kblockd/0
22 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:00 1 kblockd/1
23 root 10 -5 0 0 0 0 SW< 0.0 0.0 0:00 2 kblockd/2
Notes
- VEID – this is the Container id. A container may also be known as a VE or a VPS.
- You can view the processes on a specific container by providing the container id instead of -1 in the command above.
