OpenVZ 环境的基本操作

1. Create and start a container

vzctl create CTID --ostemplate osname                   osname 注意不要加 tar.gz    e.g. ubuntu-15.04-x86_64.tar.gz 的osname为ubuntu-15.04-x86_64
vzctl set CTID --ipadd a.b.c.d --save
vzctl set CTID --nameserver a.b.c.d --save
vzctl start CTID

Here CTID is the numeric ID for the container; osname is the name of the OS template for the container, and a.b.c.d is the IP address to be assigned to the container.

例如：

[host-node]# vzctl create 101 --ostemplate fedora-core-5-minimal
[host-node]# vzctl set 101 --ipadd 10.1.2.3 --save
[host-node]# vzctl set 101 --nameserver 10.0.2.1 --save
[host-node]# vzctl start 101

a. 创建 一个 ubuntu 15.04的container

# vzctl create 001 --ostemplate ubuntu-15.04-x86_64Creating image: /vz/private/1.tmp/root.hdd/root.hdd size=2306867K
Creating delta /vz/private/1.tmp/root.hdd/root.hdd bs=2048 size=4614144 sectors v2
Storing /vz/private/1.tmp/root.hdd/DiskDescriptor.xml
Opening delta /vz/private/1.tmp/root.hdd/root.hdd
Adding delta dev=/dev/ploop33165 img=/vz/private/1.tmp/root.hdd/root.hdd (rw)
mke2fs 1.41.12 (17-May-2010)
Discarding device blocks: done                            
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
144288 inodes, 576256 blocks
28812 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
18 block groups
32768 blocks per group, 32768 fragments per group
8016 inodes per group
Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: doneThis filesystem will be automatically checked every 29 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
tune2fs 1.41.12 (17-May-2010)
Setting maximal mount count to -1
Setting error behavior to 2
Setting interval between checks to 0 seconds
Creating balloon file .balloon-c3a5ae3d-ce7f-43c4-a1ea-c61e2b4504e8
Mounting /dev/ploop33165p1 at /vz/private/1.tmp/root.hdd/root.hdd.mnt fstype=ext4 data='' 
Unmounting device /dev/ploop33165
Opening delta /vz/private/1.tmp/root.hdd/root.hdd
Adding delta dev=/dev/ploop33165 img=/vz/private/1.tmp/root.hdd/root.hdd (rw)
Mounting /dev/ploop33165p1 at /vz/root/1 fstype=ext4 data='balloon_ino=12,' 
Creating container private area (ubuntu-15.04-x86_64)
Unmounting file system at /vz/root/1
Unmounting device /dev/ploop33165
Opening delta /vz/private/1/root.hdd/root.hdd
Adding delta dev=/dev/ploop33165 img=/vz/private/1/root.hdd/root.hdd (rw)
Mounting /dev/ploop33165p1 at /vz/root/1 fstype=ext4 data='balloon_ino=12,' 
Performing postcreate actions
Unmounting file system at /vz/root/1
Unmounting device /dev/ploop33165
CT configuration saved to /etc/vz/conf/1.conf
Container private area was created

b. 设置IP

# vzctl set 001 --ipadd 10.1.2.3 --save
CT configuration saved to /etc/vz/conf/1.conf

c. 设置nameserver

# vzctl set 001 --nameserver 10.1.2.1 --save
CT configuration saved to /etc/vz/conf/1.conf设置主机名
# vzctl set 001 --hostname ubuntu --save

d. 启动container

# vzctl start 001

e. 退出container

# exit

f. 停止销毁container

# vzctl stop 001
# vzctl destroy 001

g. 列出containers

# vzlist  CTID      NPROC STATUS    IP_ADDR         HOSTNAME1         46 running   10.1.2.3        ubuntu

h. 查看container里的进程

# vzctl exec 001 ps ax

i. 进入退出container

# vzctl enter 001
# exit

j. 热迁移

# vzmigrate --online  VEID# vzmigrate --online 192.168.137.52 2

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