Micks Distractions

I had the sit­u­a­tion at work where I wanted to run Clearcase under a Solaris 10 zone. With a bit of coerc­ing it’s pos­si­ble to do, and doesn’t impact much of the global zone at all. If you don’t know what Clearcase is, then this still may be handy infor­ma­tion to know. Undoubt­edly, there are other appli­ca­tions that rely on load­able mod­ules.

Pre-requisites

• You need a stock Solaris 10 install.

• You need to have a Clearcase release repos­i­tory with at least patch 2003.06.00–29 applied.

Clearcase zone

If you don’t know how to setup a Solaris 10 zone, then you can start off with a basic one by doing the fol­low­ing. Take par­tic­u­lar note of the LOFS mount­ing of /kernel. That’s important.

% zonecfg -z zone-clearcase
zone-clearcase: No such zone configured
Use 'create' to begin configuring a new zone.
zonecfg:zone-clearcase> create
zonecfg:zone-clearcase> set autoboot=true
zonecfg:zone-clearcase> set zonepath=/mnt/zone/zone-clearcase
zonecfg:zone-clearcase> add net
zonecfg:zone-clearcase:net> set address=10.0.0.5
zonecfg:zone-clearcase:net> set physical=hme0
zonecfg:zone-clearcase:net> end
zonecfg:zone-clearcase> add fs
zonecfg:zone-clearcase:fs> set dir=/kernel
zonecfg:zone-clearcase:fs> set special=/kernel
zonecfg:zone-clearcase:fs> set type=lofs
zonecfg:zone-clearcase:fs> set options ro,nosuid
zonecfg:zone-clearcase:fs> end
zonecfg:zone-clearcase> info
zonepath: /mnt/zones/zone-clearcase
autoboot: true
pool:
inherit-pkg-dir:
        dir: /lib
inherit-pkg-dir:
        dir: /platform
inherit-pkg-dir:
        dir: /sbin
inherit-pkg-dir:
        dir: /usr
fs:
        dir: /kernel
        special: /kernel
        raw not specified
        type: lofs
        options: [ro,nosuid]
net:
        address: 10.0.0.5
        physical: hme0
zonecfg:zone-clearcase> verify
zonecfg:zone-clearcase> commit
zonecfg:zone-clearcase> exit
% 

Now install the zone, that has just been configured.

% mkdir -p /mnt/zones/zone-clearcase
% chmod 700 /mnt/zones/zone-clearcase
% zoneadm -z zone-clearcase install
Preparing to install zone .
Creating list of files to copy from the global zone.
Copying <143885> files to the zone.
Initializing zone product registry.
Determining zone package initialization order.
Preparing to initialize <1025> packages on the zone.
Initialized <1025> packages on zone.
Zone  is initialized.
Installation of <1> packages was skipped.
Installation of these packages generated warnings: 
The file  contains a log of the zone installation.

Now you can boot up the zone, login to it’s con­sole, and fin­ish off the install.

% zoneadm list -cv     % zoneadm list -cv
    ID NAME             STATUS         PATH
     0 global           running        /
     - zone-clearcase   installed      /mnt/zones/zone-clearcase
  % zoneadm -z zone-clearcase boot
  % zlogin -C zone-clearcase
  [Connected to zone 'zone-clearcase' console]
  100/100
  What type of terminal are you using?
   1) ANSI Standard CRT
   2) DEC VT52
   3) DEC VT100

etc etc etc

Now you need to setup the clearcase repos­i­tory. I gather you have done this before, so I won’t spell it out here. Every­thing is stan­dard issue — install what you want leave out the bits you don’t want.

Once you have your clearcase repos­i­tory you will need to install clearcase first in the global zone. Don’t worry — you will be dis­abling this later on. I also gather that you have per­formed this before, so I’ll leave that out as well.

Now the fun begins. Shut­down clearcase in the global zone.

% /etc/init.d/clearcase stop

Edit the /etc/init.d/clearcase and put the fol­low­ing entries right at the start.

% /usr/sbin/modload /opt/rational/clearcase/sun5/kvm/5.10/sparcv9/mvfs
% exit    

Now startup ‘clearcase’ in the global zone. All this will do is load up the ker­nel mod­ule ‘mvfs’

Next you will have to restart your clearcase zone. This will ensure that this zone will be able to see the mvfs mod­ule loaded up.

% zoneadm -z zone-clearcase reboot

Now you can install clearcase into the zone you have cre­ated above. Do the nor­mal things, install what you want leave out the bits you don’t. How­ever, right at the end of the install you will pos­si­bly get some errors. You can ignore these.

And that’s it! You have one work­ing clearcase server in a zone. You can setup as many as you want as well.

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