diff --git a/Dockerfile.centos73.TC-builder b/Dockerfile.centos73.TC-builder
index b4773475..31b1f41b 100644
--- a/Dockerfile.centos73.TC-builder
+++ b/Dockerfile.centos73.TC-builder
@@ -117,6 +117,7 @@ RUN useradd -r -u $MYUID -g cgts -m $MYUNAME && \
 
 COPY toCOPY/finishSetup.sh /usr/local/bin
 COPY toCOPY/generate-cgcs-tis-repo /usr/local/bin
+COPY toCOPY/generate-cgcs-centos-repo /usr/local/bin
 COPY toCOPY/.inputrc /home/$MYUNAME/
 COPY toCOPY/.gitconfig /home/$MYUNAME/
 
diff --git a/README.md b/README.md
index 3ec7b0c1..2fb2b41c 100644
--- a/README.md
+++ b/README.md
@@ -174,6 +174,20 @@ repo init -u git@git.openstack.org:openstack/stx-manifest.git -m stx-manifest.xm
 repo sync
 ```
 
+### To generate cgcs-centos-repo
+
+The cgcs-centos-repo is a set of symbolic links to the packages in the mirror
+and the mock configuration file. It is needed to create these links if this is
+the first build or the mirror has been updated.
+
+```
+cd $MY_REPO_ROOT_DIR/stx-tools/scripts
+./generate-cgcs-centos-repo.sh /import/mirror/CentOS/pike
+```
+
+Where the argument to the script is the path of the mirror.
+
+
 ### To build all packages:
 ```
 $ cd $MY_REPO
diff --git a/toCOPY/generate-cgcs-centos-repo.sh b/toCOPY/generate-cgcs-centos-repo.sh
new file mode 100755
index 00000000..32de2b91
--- /dev/null
+++ b/toCOPY/generate-cgcs-centos-repo.sh
@@ -0,0 +1,119 @@
+#!/bin/bash
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+usage () {
+    echo "$0 <mirror-path>"
+}
+
+if [ $# -ne 1 ]; then
+    usage
+    exit -1
+fi
+
+if [ -z "$MY_REPO" ]; then
+    echo "\$MY_REPO is not set. Ensure you are running this script"
+    echo "from the container and \$MY_REPO points to the root of"
+    echo "your folder tree."
+    exit -1
+fi
+
+mirror_dir=$1
+dest_dir=$MY_REPO/cgcs-centos-repo
+timestamp="$(date +%F_%H%M)"
+mock_cfg_file=$dest_dir/mock.cfg.proto
+
+if [[ ( ! -d $mirror_dir/Binary ) || ( ! -d $mirror_dir/Source ) ]]; then
+    echo "The mirror $mirror_dir doesn't has the Binary and Source"
+    echo "folders. Please provide a valid mirror"
+    exit -1
+fi
+
+if [ ! -d "$dest_dir" ]; then
+    mkdir -p "$dest_dir"
+fi
+
+for t in "Binary" "Source" ; do
+    target_dir=$dest_dir/$t
+    if [ ! -d "$target_dir" ]; then
+        mkdir -p "$target_dir"
+    else
+        mv -f "$target_dir" "$target_dir-backup-$timestamp"
+        mkdir -p "$target_dir"
+    fi
+
+    pushd "$mirror_dir/$t"|| exit 1
+    find . -type d -exec mkdir -p "${target_dir}"/{} \;
+    popd || exit 1
+
+    all_files=$(find "$mirror_dir/$t" -type f -name "*")
+    for ff in $all_files; do
+        f_name=$(basename "$ff")
+        ln -sf "$ff" "$target_dir/$f_name"
+        echo "Creating symlink for $target_dir/$f_name"
+        echo "------------------------------"
+    done
+done
+
+read -r -d '' MOCK_CFG <<-EOF
+config_opts['root'] = 'BUILD_ENV/mock'
+config_opts['target_arch'] = 'x86_64'
+config_opts['legal_host_arches'] = ('x86_64',)
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['dist'] = 'el7'  # only useful for --resultdir variable subst
+config_opts['releasever'] = '7'
+config_opts['rpmbuild_networking'] = False
+
+config_opts['yum.conf'] = """
+[main]
+keepcache=1
+debuglevel=2
+reposdir=/dev/null
+logfile=/var/log/yum.log
+retries=20
+obsoletes=1
+gpgcheck=0
+assumeyes=1
+syslog_ident=mock
+syslog_device=
+
+# repos
+[local-std]
+name=local-std
+baseurl=LOCAL_BASE/MY_BUILD_DIR/std/rpmbuild/RPMS
+enabled=1
+skip_if_unavailable=1
+metadata_expire=0
+
+[local-rt]
+name=local-rt
+baseurl=LOCAL_BASE/MY_BUILD_DIR/rt/rpmbuild/RPMS
+enabled=1
+skip_if_unavailable=1
+metadata_expire=0
+
+[local-installer]
+name=local-installer
+baseurl=LOCAL_BASE/MY_BUILD_DIR/installer/rpmbuild/RPMS
+enabled=1
+skip_if_unavailable=1
+metadata_expire=0
+
+[TisCentos7Distro]
+name=Tis-Centos-7-Distro
+enabled=1
+baseurl=LOCAL_BASE/MY_REPO_DIR/cgcs-centos-repo/Binary
+failovermethod=priority
+exclude=kernel-devel libvirt-devel
+
+
+"""
+EOF
+
+if [ -f "$mock_cfg_file" ]; then
+    mv "$mock_cfg_file" "$mock_cfg_file-backup-$timestamp"
+fi
+
+echo "Creating mock config file"
+echo "$MOCK_CFG" >> "$mock_cfg_file"