--- a
+++ b/docker/epel.repo
@@ -0,0 +1,26 @@
+[epel]
+name=Extra Packages for Enterprise Linux 7 - $basearch
+baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/$basearch
+#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
+failovermethod=priority
+enabled=1
+gpgcheck=1
+gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
+
+[epel-debuginfo]
+name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
+baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/$basearch/debug
+#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-7&arch=$basearch
+failovermethod=priority
+enabled=0
+gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
+gpgcheck=1
+
+[epel-source]
+name=Extra Packages for Enterprise Linux 7 - $basearch - Source
+baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/SRPMS
+#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-7&arch=$basearch
+failovermethod=priority
+enabled=0
+gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
+gpgcheck=1