el6 docker builds: prefer v4 resolution

(cherry picked from commit a610ced8e0a09540ee9aac4eea8a72f563792838)

diff --git a/builder-support/dockerfiles/Dockerfile.target.centos-6 b/builder-support/dockerfiles/Dockerfile.target.centos-6
index f4da52c362411fbe158f2fd2f7b8e065c7d4f81e..d9e5c1986597bdb7882395a0799ada7fc2a8d9a6 100644 (file)
--- a/builder-support/dockerfiles/Dockerfile.target.centos-6
+++ b/builder-support/dockerfiles/Dockerfile.target.centos-6
@@ -5,6 +5,12 @@
 # Put only the bare minimum of common commands here, without dev tools
 FROM centos:6 as dist-base
 COPY /builder-support/dockerfiles/Centos-Base-Vault.repo /etc/yum.repos.d/CentOS-Base.repo
+RUN echo precedence ::ffff:0:0/96  100 > /etc/gai.conf
+RUN echo precedence ::1/128 50 >> /etc/gai.conf
+RUN echo precedence ::/0 40 >> /etc/gai.conf
+RUN echo precedence 2002::/16 30 >> /etc/gai.conf
+RUN echo precedence ::/96 20 >> /etc/gai.conf
+
 ARG BUILDER_CACHE_BUSTER=
 RUN which yum
 RUN touch /var/lib/rpm/* && yum clean all