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 dkLab | Constructor | dklab_vzenter: "vzctl enter" using a domain name part (for OpenVZ) 

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The installation is very simple. Just enter your host system and type:

copy code to clipboard Listing 1: Installation commands

cd /usr/sbin wget http://dklab.ru/lib/dklab_vzenter/demo/e chmod +x e

The usage is simple too:

copy code to clipboard Listing 2: Usage sample

# e <domain_name_part>

Note that <domain_name_part> may have letters absence in any place (even in the middle), it it does not cause a contradictory with other names in the system. Assume you have the following 4 containers in your host system:

web-a-01.pr.example.com
web-a-02.pr.example.com
ns1.example.com
test.pr.example.com

Let's consider how e command (shorten spelling of dklab_vzenter) works:

# e web-a-01
Entering web-a-01.pr.example.com
entered into CT 110

# e w1
Entering web-a-01.pr.example.com
entered into CT 110

# e w2
Entering web-a-02.pr.example.com
entered into CT 111

# e ns
Entering ns1.example.com
entered into CT 310

# e test
Entering test.pr.example.com
entered into CT 210

You see, dklab_vzenter tries to find names which includes typed characters in their order, but not necessarily successively. Now let's see what would happen if more than one matches are found:

# e web
More than one match found, please detalise:
  110  web-a-01.pr.example.com
  111  web-a-02.pr.example.com

So, you may enter a container only typing a noncontradictory part of its domain name.

Resume

The dklab_vzenter tool (command-line e) speeds up the usage of OpenVZ's popular vzctl enter NNN instruction allowing you to type a domain name part instead of CTID.