Re: [gentoo-user] Local portage git mirror

[Bill Kenworthy]

On 17/01/17 18:03, Peter Humphrey wrote:
> Hello list,
>
> Does anyone have some pointers to setting up a local portage mirror for git
> to serve? I'm looking at http://www.funtoo.org/Portage_Git_Mirror but some
> details are obscure to me. I hope I'm not going to have to roll my sleeves
> up and learn the whole of git; I just want to cut down the time my boxes
> take to sync via git - some of them have their portage trees nfs-mounted in
> chroots on my workstation and take anything up to 20 minutes to sync.
>
> One question comes up straight away: should the git-served repository be the
> host's own /usr/portage tree? And what cron task should I run to refresh the
> mirror?
>
> Any help would be gratefully received.
>
> (I can still read e-mails via web-mail even when KMail is playing up.)
>

I moved my systems to a local git repos some time ago - it works (fast -
much faster than rsync!)but its not perfect:

It would be nice if someone can share how it really should be done!
Below is the contents of an email to the list in 2015 when I got it working:

* problems:
the files in /usr/share/portage sometimes get overridden and give an
error message
renaming "gentoo" to "olympus" (the server host) made sense at the time
but creates odd errors at times requiring files to be restored.
git doesnt use the portage checksums which besides odd errors at times
required using "thin-manifests = true" in
"/usr/portage/metadata/layout.conf"




++++++++++++++++++
Replace your rsync infrastructure with a git one.  After set up, there
is faster syncing than rsync, both externally to the gentoo
infrastructure (reasonable ADSL link), and really fast compared to rsync
internally.  Not simple, but its a one off hit on just a few machines
for me.  Works for me, no warranty etc.

Thanks to Michael and Hasufell for the hints needed to get this working.
Apologies for the line wrap.



Replace with your own values!
repo name: olympus
repo master host: olympus.lan.localdomain

On the master:

install git !!!

Download https://github.com/hasufell/portage-gentoo-git-config

unzip

cp -v portage-gentoo-git-config-master/etc/portage/repo.postsync.d/*
/etc/portage/repo.postsync.d/

cp portage-gentoo-git-config-master/etc/portage/repos.conf/gentoo.conf
/etc/portage/repos.conf/

if needed: chmod +x /etc/portage/repo.postsync.d/sync_overlay_cache
cd /usr/
mv portage portage.old

emerge --sync


To use as the master for your own mirror system:
Uncomment the lines in /etc/rsyncd.conf to set up your own
gentoo-portage rsync server - still needed for now

rc-update add rsyncd

/etc/init.d/rsyncd start



On the internal clients wanting to use the mirror:
reccomended: set up passwordless ssh between clients and the master

emerge dev-vcs/git

create /etc/portage/repos.conf/olympus.conf as follows
--------------------
[DEFAULT]
main-repo = olympus

[olympus]
location = /usr/portage
sync-type = git
sync-uri = git://olympus.lan.localdomain:/usr/portage
auto-sync = yes
--------------------

create /etc/portage/repo.postsync.d/sync_olympus
--------------------
#!/bin/bash

repository_name="${1}"
repository_path="${3}"

[[ ${repository_name} == "olympus" ]] || exit 0

source /lib/gentoo/functions.sh

# Number of jobs for egencache, default is number or processors.
parallel_jobs="$(nproc)"

# caches
ebegin "Fetching pre-generated metadata cache for ${repository_name}"
	rsync -a
rsync://olympus.lan.localdomain/gentoo-portage/metadata/md5-cache/
"${repository_path}"/metadata/md5-cache/
eend $?

ebegin "Updating metadata cache for ${repository_name}"
	egencache --jobs="${parallel_jobs}" --repo="${repository_name}"
--update --update-use-local-desc
eend $?

#DTD's
DTDDIR="${repository_path}"/metadata/dtd
ebegin "Updating DTDs"
if [[ -e ${DTDDIR} ]]; then
        git -C "${DTDDIR}" pull -q --ff
else
        git clone olympus.lan.localdomain:/usr/portage/metadata/dtd
"${DTDDIR}"
fi
eend "$?"

#GLSA's
GLSADIR="${repository_path}"/metadata/glsa
ebegin "Updating GLSAs"
if [[ -e ${GLSADIR} ]]; then
        git -C "${GLSADIR}" pull -q --ff
else
        git clone olympus.lan.localdomain:/usr/portage/metadata/glsa
"${GLSADIR}"
fi
eend "$?"

# herds
ebegin "Updating herds.xml"
    rsync -a
rsync://olympus.lan.localdomain/gentoo-portage/metadata/herds.xml
"${repository_path}"/metadata/md5-cache/
eend $?

#news
NEWSDIR="${repository_path}"/metadata/news
ebegin "Updating news items"
if [[ -e ${NEWSDIR} ]]; then
        git -C "${NEWSDIR}" pull -q --ff
else
        git clone olympus.lan.localdomain:/usr/portage/metadata/news
"${NEWSDIR}"
fi
eend $? "Try to remove ${NEWSDIR}"
--------------------


mv /usr/portage /usr/portage.old

git clone olympus.lan.localdomain:/usr/portage /usr/portage

echo 'olympus' > /usr/portage/profiles/repo_name

echo 'masters = olympus' > /usr/local/portage/metadata/layout.conf

echo 'thin-manifests = true' >> /usr/local/portage/metadata/layout.conf

cp  /usr/portage/metadata/layout.conf
/usr/local/portage/metadata/layout.conf

cp /etc/portage/repos.conf/olympus.conf /usr/share/portage/config/repos.conf

emerge --sync
emerge --sync

* the first sync will complete the process, the second is to check there are
  no errors.