Merge pull request PowerDNS#14422 from Habbie/backport-14403-to-auth-…

…4.7.x

auth-4.7: switch el7 builds to Oracle Linux 7

.github/workflows/builder.yml

@@ -24,7 +24,7 @@ jobs:
       matrix:
         product: ['authoritative']
         os:
-          - centos-7
+          - el-7
           - ubuntu-bionic
           - el-8
           - centos-9-stream

builder-support/dockerfiles/Dockerfile.target.el-7

@@ -1 +1 @@
-Dockerfile.target.centos-7
+Dockerfile.target.oraclelinux-7

builder-support/dockerfiles/Dockerfile.target.oraclelinux-7

@@ -0,0 +1,18 @@
+# First do the source builds
+@INCLUDE Dockerfile.target.sdist
+
+# This defines the distribution base layer
+# Put only the bare minimum of common commands here, without dev tools
+FROM oraclelinux:7 as dist-base
+
+ARG BUILDER_CACHE_BUSTER=
+RUN touch /var/lib/rpm/* && yum install -y oracle-epel-release-el7 oracle-softwarecollection-release-el7 && \
+	yum-config-manager  --add-repo=http://yum.oracle.com/repo/OracleLinux/OL7/optional/developer/$(uname -m)/ && \
+    yum install -y --nogpgcheck devtoolset-8-gcc-c++ scl-utils
+
+# Do the actual rpm build
+@INCLUDE Dockerfile.rpmbuild
+
+# Do a test install and verify
+# Can be skipped with skippackagetest=1 in the environment
+@EXEC [ "$skippackagetest" = "" ] && include Dockerfile.rpmtest