Added Oracle Linux 8 images instead of CentOS 8

proxy-mysql/ol/Dockerfile

@@ -45,12 +45,15 @@ RUN set -eux && \
     mkdir -p /var/lib/zabbix/ssl/ssl_ca && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /usr/share/doc/zabbix-proxy-mysql && \
+    mkdir -p /etc/yum/vars/ && \
+    echo "" > /etc/yum/vars/ociregion && \
+    echo "oracle.com" > /etc/yum/vars/ocidomain && \
     microdnf -y module enable mysql && \
     INSTALL_PKGS="libevent \
             systemd \
             libssh \
-            fping \
             file-libs \
+            fping \
             libxml2 \
             mysql \
             mysql-libs \
@@ -61,8 +64,10 @@ RUN set -eux && \
             pcre \
             zlib \
             unixODBC" && \
-    microdnf -y install --setopt=install_weak_deps=0 --best \
-        --nodocs ${INSTALL_PKGS} && \
+    microdnf -y --disablerepo="*" --enablerepo="ol8_baseos_latest" \
+        --enablerepo="ol8_appstream" \
+        --enablerepo="ol8_developer_EPEL" \
+        install --setopt=install_weak_deps=0 --best --nodocs ${INSTALL_PKGS} && \
     curl -L "https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-${ARCH_SUFFIX}" -o /sbin/tini && \
     curl -L "https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-${ARCH_SUFFIX}.asc" -o /tmp/tini.asc && \
     export GNUPGHOME="$(mktemp -d)" && \
@@ -111,9 +116,6 @@ RUN set -eux && \
             unixODBC-devel" && \
     microdnf -y install --setopt=install_weak_deps=0 --best \
         --nodocs dnf && \
-    mkdir -p /etc/yum/vars/ && \
-    echo "" > /etc/yum/vars/ociregion && \
-    echo "oracle.com" > /etc/yum/vars/ocidomain && \
     dnf -y install --disablerepo "*" --enablerepo "${REPOLIST}" --setopt=install_weak_deps=False --best \
         --setopt=tsflags=nodocs ${INSTALL_PKGS} && \
     cd /tmp/ && \
@@ -158,7 +160,6 @@ RUN set -eux && \
     dnf -y history undo last && \
     dnf -y clean all && \
     microdnf -y remove dnf && \
-    rm -rf /etc/yum/ && \
     rm -rf /var/cache/yum /var/lib/yum/yumdb/* /usr/lib/udev/hwdb.d/* && \
     rm -rf /var/cache/dnf /etc/udev/hwdb.bin /root/.pki
 

proxy-mysql/ol/conf/etc/yum.repos.d/oracle-epel-ol8.repo

@@ -3,4 +3,4 @@ name=Oracle Linux $releasever EPEL Packages for Development ($basearch)
 baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL8/developer/EPEL/$basearch/
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
 gpgcheck=1
-enabled=1
+enabled=0