[gentoo-user] emerge --sync

[gentoo-user] emerge --sync

[Jorge Almeida]

I want to do emerge --sync on computer A and then update computer B by
copying /usr/portage. Is this safe? The point is: does emerge --sync
just updates the contents of /usr/portage or does it also change
something else ?

TIA

Jorge Almeida

[gentoo-user] Re: emerge --sync

[Martin Vaeth]

Jorge Almeida <jjalmeida@gmail.com> wrote:
> I want to do emerge --sync on computer A and then update computer B by
> copying /usr/portage. Is this safe?

Yes, although ...

> does emerge --sync just updates the contents of /usr/portage

portage also changes the content of /var/cache/edb, and in some
cases even of /var/db or even of binary packages, but it will
repeat the necessary steps automatically if only /usr/portage
has changed.

Re: [gentoo-user] Re: emerge --sync

[Jorge Almeida]

On Mon, Oct 24, 2016 at 8:29 AM, Martin Vaeth <martin@mvath.de> wrote:
> Jorge Almeida <jjalmeida@gmail.com> wrote:
>> I want to do emerge --sync on computer A and then update computer B by
>> copying /usr/portage. Is this safe?
>
> Yes, although ...
>
>> does emerge --sync just updates the contents of /usr/portage
>
> portage also changes the content of /var/cache/edb, and in some
> cases even of /var/db or even of binary packages, but it will
> repeat the necessary steps automatically if only /usr/portage
> has changed.
>
>
Does this mean that the next time portage is used (e.g., as in "emerge
-p ...") it will detect that /usr/portage is not consistent with
/var/db... and will fix the latter?

Jorge

Re: [gentoo-user] Re: emerge --sync

[Fernando Rodriguez]

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Hash: SHA256

On 10/24/2016 11:35 AM, Jorge Almeida wrote:
> On Mon, Oct 24, 2016 at 8:29 AM, Martin Vaeth <martin@mvath.de> wrote:
>> Jorge Almeida <jjalmeida@gmail.com> wrote:
>>> I want to do emerge --sync on computer A and then update computer B by
>>> copying /usr/portage. Is this safe?
>>
>> Yes, although ...
>>
>>> does emerge --sync just updates the contents of /usr/portage
>>
>> portage also changes the content of /var/cache/edb, and in some
>> cases even of /var/db or even of binary packages, but it will
>> repeat the necessary steps automatically if only /usr/portage
>> has changed.
>>
>>
> Does this mean that the next time portage is used (e.g., as in "emerge
> -p ...") it will detect that /usr/portage is not consistent with
> /var/db... and will fix the latter?

Yes. And you will see the same output that your see at the end of emerge
- --sync (the profile updates phase, whatever it's called) when you run
emerge. To update the eix database you need to run eix-update.

But a more elegant solution is to emerge app-admin/gentoo-rsync-mirror and
setup your own rsync mirror.


> Jorge
> 


- -- 

Fernando Rodriguez
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Re: [gentoo-user] Re: emerge --sync

[Jorge Almeida]

On Mon, Oct 24, 2016 at 9:36 AM, Fernando Rodriguez <cyklonite@gmail.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> On 10/24/2016 11:35 AM, Jorge Almeida wrote:
>> On Mon, Oct 24, 2016 at 8:29 AM, Martin Vaeth <martin@mvath.de> wrote:
>>> Jorge Almeida <jjalmeida@gmail.com> wrote:
>>>> I want to do emerge --sync on computer A and then update computer B by
>>>> copying /usr/portage. Is this safe?
>>>
>>> Yes, although ...
>>>
>>>> does emerge --sync just updates the contents of /usr/portage
>>>
>>> portage also changes the content of /var/cache/edb, and in some
>>> cases even of /var/db or even of binary packages, but it will
>>> repeat the necessary steps automatically if only /usr/portage
>>> has changed.
>>>
>>>
>> Does this mean that the next time portage is used (e.g., as in "emerge
>> -p ...") it will detect that /usr/portage is not consistent with
>> /var/db... and will fix the latter?
>
> Yes. And you will see the same output that your see at the end of emerge
> - --sync (the profile updates phase, whatever it's called) when you run
> emerge. To update the eix database you need to run eix-update.

OK, looks good.

>
> But a more elegant solution is to emerge app-admin/gentoo-rsync-mirror and
> setup your own rsync mirror.
>

Sure, but it seems kind of overkill.

Thanks,

Jorge

Re: [gentoo-user] Re: emerge --sync

[Rich Freeman]

On Mon, Oct 24, 2016 at 12:45 PM, Jorge Almeida <jjalmeida@gmail.com> wrote:
> On Mon, Oct 24, 2016 at 9:36 AM, Fernando Rodriguez <cyklonite@gmail.com> wrote:
>>
>> But a more elegant solution is to emerge app-admin/gentoo-rsync-mirror and
>> setup your own rsync mirror.
>>
>
> Sure, but it seems kind of overkill.
>

It really depends on your situation.

I run Gentoo containers and I typically just bind mount /usr/portage
and distfiles from the host, and that works just fine.  When I was
running Gentoo VMs I had rsync running on a Gentoo box and just shared
out /usr/portage and put it at the front of my mirror list (I also
shared distfiles via http I believe).  If you already have the
services installed it is pretty trivial to set up either and it will
speed things up.

People will go even further if they have large number of Gentoo boxes
and run their own repositories that isn't live-synced with Gentoo's,
allowing for a testing/release cycle.

In general though portage will figure out if any packages moved in the
repo no matter how you sync it.

-- 
Rich

Re: [gentoo-user] Re: emerge --sync

[Jorge Almeida]

On Mon, Oct 24, 2016 at 9:56 AM, Rich Freeman <rich0@gentoo.org> wrote:
> On Mon, Oct 24, 2016 at 12:45 PM, Jorge Almeida <jjalmeida@gmail.com> wrote:
>> On Mon, Oct 24, 2016 at 9:36 AM, Fernando Rodriguez <cyklonite@gmail.com> wrote:
>>>
>>> But a more elegant solution is to emerge app-admin/gentoo-rsync-mirror and
>>> setup your own rsync mirror.
>>>
>>
>> Sure, but it seems kind of overkill.
>>
>
> It really depends on your situation.
>
> I run Gentoo containers and I typically just bind mount /usr/portage
> and distfiles from the host, and that works just fine.  When I was
> running Gentoo VMs I had rsync running on a Gentoo box and just shared
> out /usr/portage and put it at the front of my mirror list (I also
> shared distfiles via http I believe).  If you already have the
> services installed it is pretty trivial to set up either and it will
> speed things up.
>
> People will go even further if they have large number of Gentoo boxes
> and run their own repositories that isn't live-synced with Gentoo's,
> allowing for a testing/release cycle.
>
> In general though portage will figure out if any packages moved in the
> repo no matter how you sync it.
>

My use case is basic: 2 home computers, I do emerge et. al. on the
faster one and produce binary packages to be used on the other one,
which doesn't even need distfiles, just portage tree plus binary
packages.  I copy stuff between boxes with rsync via ssh. Simple
enough and it seems to be working fine.

Thanks

Jorge

Re: [gentoo-user] Re: emerge --sync

[Alarig Le Lay]

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On Mon Oct 24 10:44:24 2016, Jorge Almeida wrote:
> My use case is basic: 2 home computers, I do emerge et. al. on the
> faster one and produce binary packages to be used on the other one,
> which doesn't even need distfiles, just portage tree plus binary
> packages.  I copy stuff between boxes with rsync via ssh. Simple
> enough and it seems to be working fine.

I use a similar setup for LXC containers running over a gentoo box,
except that my box is setted up to publish the binary packets on a
specified directory that is accessible via HTTP. My LXCs take the binary
packages from this HTTP location and do their normal stuff afterward.
The host box is also a local rsync mirror.

-- 
alarig

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Re: [gentoo-user] Re: emerge --sync

[Rich Freeman]

On Mon, Oct 24, 2016 at 2:02 PM, Alarig Le Lay <alarig@swordarmor.fr> wrote:
>
> I use a similar setup for LXC containers running over a gentoo box,
> except that my box is setted up to publish the binary packets on a
> specified directory that is accessible via HTTP. My LXCs take the binary
> packages from this HTTP location and do their normal stuff afterward.
> The host box is also a local rsync mirror.
>

Why not just share everything via bind mounts in this case?  I'd think
that would have less overhead than rsync/http and then you're not
storing files twice.

-- 
Rich

Re: [gentoo-user] Re: emerge --sync

[Alarig Le Lay]

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On Mon Oct 24 15:49:09 2016, Rich Freeman wrote:
> Why not just share everything via bind mounts in this case?  I'd think
> that would have less overhead than rsync/http and then you're not
> storing files twice.

Because I have several host boxes and I build the packages on only one.

-- 
alarig

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Re: [gentoo-user] Re: emerge --sync

[Miroslav Rovis]

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On 161024-22:27+0200, Alarig Le Lay wrote:
> On Mon Oct 24 15:49:09 2016, Rich Freeman wrote:
> > Why not just share everything via bind mounts in this case?  I'd think
> > that would have less overhead than rsync/http and then you're not
> > storing files twice.
> 
> Because I have several host boxes and I build the packages on only one.

I used to have 3 (even 4) same-hardware machines (well same MBO really)
in daily use, and the local mirror is not an overkill long run. And if
you look for security, then also Air-Gapping and cloning is a perfect
solution, because you get a clean clone for online with an Air-Gapped
that does not see online...

Some peple like rather btrfs ...

I had written a lot about Air-Gapped and cloning on the Forums, but
maybe moderators would call it "blogging" if I gave you the link.

btrfs I never used OTOH.

-- 
Miroslav Rovis
Zagreb, Croatia
http://www.CroatiaFidelis.hr

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Re: [gentoo-user] emerge --sync

[Håkon Alstadheim]

Den 24. okt. 2016 17:21, skrev Jorge Almeida:
> I want to do emerge --sync on computer A and then update computer B by
> copying /usr/portage. Is this safe? The point is: does emerge --sync
> just updates the contents of /usr/portage or does it also change
> something else ?
I have one box that I run emerge --sync on, and then export /usr/portage
with nfs to a few other gentoo boxes. Works well. For eix, you can do
eix-update on the nfs-clients. I have been experimenting with building
once and using the nfs-server as binhost. Small variations between the
boxes have so far made me abandon that, but a single version of
/usr/portage has given me no headaches.

Re: [gentoo-user] emerge --sync

[Dale]

Jorge Almeida wrote:
> I want to do emerge --sync on computer A and then update computer B by
> copying /usr/portage. Is this safe? The point is: does emerge --sync
> just updates the contents of /usr/portage or does it also change
> something else ?
>
> TIA
>
> Jorge Almeida
>
>

This may be a solution.

net-proxy/http-replicator 

I've used it here in the past when I had two rigs. 

Dale

:-)  :-)