tools/stx/stx-build-tools-chart/stx-builder/dependency_chart/stx-pkgbuilder
Davlet Panech ec39ac4d95 debian: better resolv.conf in builder containers
Add option ndots:1 to /etc/resolv.conf

This fixes a few issues with DNS queries within docker containers.

Normally when looking up a host name such as "debian.org", libc appends
the search domains from /etc/resolv.conf to the host name, then makes a
separate query for each "long" name. For example, if "search" in
/etc/resolv.conf contains "domain1.org domain2.org", we make 3 queries
when looking for debian.org's IP addr:

- debian.org.domain1.org (fail)
- debian.org.domain2.org (fail)
- debian.org (success)

Setting "ndots:1" makes it send the last unqualified query before the
other queries with appended search domains -- for any names that
contain >= 1 dot.

This patch solves 2 problems:

(1) In Alpine Linux (used by the "docker" pod), libc has a limitation:
    the domain search list can't have more than 5 entries. If it does it
    stops sending any more DNS queries and the last (unqualified) query
    never happens, so many hostname lookups fail.

(2) These extra queries are not necessary a lot of the time, so this
    patch makes host name lookups faster

TESTS
===============================

- Rebuild all containers
- Rebuild packages and the ISO
- Make sure DNS queries work in all containers

Story: 2009897
Task: 45156

Signed-off-by: Davlet Panech <davlet.panech@windriver.com>
Change-Id: I7dd72b8fcc776821138c362c3aec9f4e5962a319
2022-04-22 11:58:49 -04:00
..
templates debian: better resolv.conf in builder containers 2022-04-22 11:58:49 -04:00
Chart.yaml stx tool: control: Add the support of control module 2021-09-15 21:35:47 -04:00
values.yaml debian: better resolv.conf in builder containers 2022-04-22 11:58:49 -04:00