Date: Tue, 27 Oct 2009 19:41:29 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> To: "Tonix (Antonio Nati)" <tonix@interazioni.it> Cc: freebsd-isp@freebsd.org, freebsd-jail@freebsd.org Subject: Re: Jails creation Message-ID: <4AE73ED9.5000505@quip.cz> In-Reply-To: <4AE728F8.7020809@interazioni.it> References: <4AE6C7BD.907@interazioni.it> <4AE7232E.2070208@quip.cz> <4AE728F8.7020809@interazioni.it>
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Tonix (Antonio Nati) wrote: > Miroslav Lachman ha scritto: [...] >> You are not the first one with this idea. You can easily use nullfs >> mount of directories from base system, but people mostly prefer >> independent directory with jail install shared by many jails. >> >> And sometimes somebody needs jails with modified binaries, so it is >> not possible to share theme with base system in all cases. >> >> There are many ways to get jails running without sources, it is up to >> you to choose one. [...] > I have nothing against shared dirs, but my question is this: why the > basic jail creation command requires compilation? Given the fact jail > must have exactly the same version of base system, why the base create > command dos not simply copy the existing binaries? It would avoid local > source, remote packages, etc... It is not true. Jail command does not requires compilation, nor exactly same version. I am running 6.x version jail on system with 7.2 and you can run 32bit (i386) jail on 64bit (amd64) system. The `jail` command is there just for starting the jail, not for building it. The jail even does not need to be a full installed system! There are too many different scenarios with jails, that there can not be "one command to satisfy them all". It is up to administrator to prepare the best environment for his/her needs. If you need the full copy of the base system, you can do it really easily (by tar as was suggested by Vincet Hoffman or dump & restore), and if you do it for each jail, you loose the benefits of shared read-only base directory (you will need more disk space and more memory). If you do not want to spend some time by compilation, you can install the jail from installation media you already have from system install. cd /some/media/7.2-RELEASE/base mkdir /path/to/myjail setenv DESTDIR /path/to/myjail sh install.sh That's all! It is too simple in contrast to source build or manually copy something from base. If you are using ZFS, you can use snapshots and clones... And many more scenarios exist. I am CCing freebsd-jail@, it is more appropriate list to contionue. Miroslav Lachman
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