openSUSE admin

pjessen wrote:

Fwiw, retrieving a mirrorlist with COUNTRY=tr, I don't get any mirrors in Turkey ?

The problem is not a mirror in Turkey, but rather that Turkey's requests should be sent to Europe instead of Asia since the internet backbone in Turkey has a better link to Europe according to Ilgaz.

Turkey is classified as being in Asia in the MaxMind DB and also by Wikipedia. That's why requests are sent to mirrors in Asia.

Is it possible to override this behavior in MirrorCache? Selected countries to override the default continent they are sent to.

Countries in South/Central America may have the same issue, as some have better backbones to Brazil or the USA instead of Europe.

avicenzi wrote:

pjessen wrote:

Fwiw, retrieving a mirrorlist with COUNTRY=tr, I don't get any mirrors in Turkey ?

The problem is not a mirror in Turkey, but rather that Turkey's requests should be sent to Europe instead of Asia since the internet backbone in Turkey has a better link to Europe according to Ilgaz.

a) the above is clearly a problem - surely I should be getting a list of our mirrors in Turkey when I specify COUNTRY=tr.
b) Ilgaz did some good work on getting more mirrors in Turkey, personally I wouldn't go creating a custom config, but it's none of my business.

We used to have ASN support (for network 'proximity') in mirrorbrain, but I guess that wasn't migrated to mirrorcache.

It seems to be working, at least one mirror in Turkey returned in this case:

$ curl -H 'X-Forwarded-For: 31.223.0.183' http://download.opensuse.org/tumbleweed/iso/README.FIRST.metalink
<?xml version="1.0" encoding="UTF-8"?>

<metalink version="3.0" xmlns="http://www.metalinker.org/" type="dynamic" origin="http://download.opensuse.org/tumbleweed/iso/README.FIRST.metalink" generator="MirrorCache" pubdate="2022-09-22 08:40:36 UTC">
  <publisher>
    <name>openSUSE</name>
    <url>download.opensuse.org</url>
  </publisher>
  <files>
    <file name="README.FIRST">
      <size>340</size>
      <!-- <mtime>1663765680</mtime> -->
      <hash type="md5">ac20b0990012314f1463bd8beda8d67e</hash>
      <hash type="sha-1">2577b0abca57bf117e04ca34c9dcc7d887e08891</hash>
      <hash type="sha-256">7d30e2fbb33cca14376829a76e7c298c91ff50b82389c63da942477d6bfe3fc1</hash>
      <resources>
        <!-- Mirrors which handle this country (TR):  -->
        <url type="http" location="TR" preference="100">http://ftp.linux.org.tr/opensuse/tumbleweed/iso/README.FIRST</url>
        <!-- Mirrors in the same continent (AS):  -->
        <url type="http" location="SG" preference="99">http://twrepo.opensuse.id//tumbleweed/iso/README.FIRST</url>
        <url type="http" location="TW" preference="98">http://free.nchc.org.tw/opensuse/tumbleweed/iso/README.FIRST</url>
        <url type="http" location="IL" preference="97">http://mirror.isoc.org.il/pub/opensuse/tumbleweed/iso/README.FIRST</url>
        <url type="http" location="AM" preference="96">http://opensuse.ucom.am//tumbleweed/iso/README.FIRST</url>
        <url type="http" location="CN" preference="95">http://mirrors.bfsu.edu.cn/opensuse/tumbleweed/iso/README.FIRST</url>
        <url type="http" location="CN" preference="94">http://mirrors.nju.edu.cn/opensuse/tumbleweed/iso/README.FIRST</url>
        <url type="http" location="CN" preference="93">http://mirrors.tuna.tsinghua.edu.cn/opensuse/tumbleweed/iso/README.FIRST</url>
        <url type="http" location="CN" preference="92">http://mirrors.cqu.edu.cn/opensuse/tumbleweed/iso/README.FIRST</url>
        <url type="http" location="CN" preference="91">http://mirror.lzu.edu.cn/opensuse/tumbleweed/iso/README.FIRST</url>
        <url type="http" location="UZ" preference="90">http://mirror.dc.uz/opensuse/tumbleweed/iso/README.FIRST</url>
        <!-- Mirrors in other parts of the world:  -->
        <!-- File origin location:  -->
        <url type="http" location="" preference="89">http://downloadcontent2.opensuse.org/tumbleweed/iso/README.FIRST</url>
      </resources>
    </file>
  </files>
</metalink>

MirrorCache is returning mirrors in the same country first, not by proximity, then it adds mirrors in the same continent.

Maybe MirrorCache should do:

• Mirrors in the same country (all mirrors)
• Mirrors close to the country (top 5 or 10 by proximity)
• Mirrors in the same continent (top 5 or 10)
• Mirrors in other parts of the world

This still does not guarantee that Europe mirrors are close to Turkey if compared to Asia.
Turkey has only two mirrors it seems, it is very likely that they don't have all the data, and requests could still be sent to Asia.

avicenzi wrote:

It seems to be working, at least one mirror in Turney returned in this case:

$ curl -H 'X-Forwarded-For: 31.223.0.183' http://download.opensuse.org/tumbleweed/iso/README.FIRST.metalink

Maybe the issue is specific to the mirrorlist, with COUNTRY=cc specified?

http://download.opensuse.org/distribution/leap/15.3/iso/openSUSE-Leap-15.3-3-DVD-x86_64-Build38.1-Media.iso.mirrorlist?COUNTRY=tr

I still see:

Mirrors

List of best mirrors for IP address 185.85.248.1, located at 47.1449,8.1551 in (TR)
Mirrors which handle this country:

    None

MirrorCache is returning mirrors in the same country first, not by proximity, then it adds mirrors in the same continent.

Right, but mirrorbrain would also order those by network proximity, also within the same country.

Maybe MirrorCache should do:

• Mirrors in the same country (all mirrors)
• Mirrors close to the country (top 5 or 10 by proximity)
• Mirrors in the same continent (top 5 or 10)
• Mirrors in other parts of the world

+1 I think that is pretty much what mirrorbrain did, it would just combine 2 and 3.

This still does not guarantee that Europe mirrors are close to Turkey if compared to Asia.

I think the issue is - should we really be customising our setup depending on which countries have the "best" connections to other countries?
I agree the initial idea - that a "country will have the best connections on its own continent" - may not always hold true anymore, but what do we replace it with?