diff --git a/doc/source/admin/image-building.rst b/doc/source/admin/image-building.rst
index 41e556e395..2f53588aa6 100644
--- a/doc/source/admin/image-building.rst
+++ b/doc/source/admin/image-building.rst
@@ -164,7 +164,7 @@ Build OpenStack from source
 
 When building images, there are two methods of the OpenStack install. One is
 ``binary``. Another is ``source``. The ``binary`` means that OpenStack will be
-installed from apt/yum. And the ``source`` means that OpenStack will be
+installed from apt/dnf. And the ``source`` means that OpenStack will be
 installed from source code. The default method of the OpenStack install is
 ``binary``. It can be changed to ``source`` using the ``-t`` option:
 
diff --git a/docker/base/Dockerfile.j2 b/docker/base/Dockerfile.j2
index a0a0ffebec..07dcc9461e 100644
--- a/docker/base/Dockerfile.j2
+++ b/docker/base/Dockerfile.j2
@@ -51,10 +51,12 @@ RUN CURRENT_DISTRO_RELEASE=$(awk '{match($0, /[0-9]+/,version)}END{print version
     && cat /tmp/kolla_bashrc >> /etc/bashrc \
     && sed -i 's|^\(override_install_langs=.*\)|# \1|' /etc/dnf/dnf.conf
 
+{% block base_dnf_conf %}
 {% block base_yum_conf %}
 
 COPY dnf.conf /etc/dnf/dnf.conf
 
+{% endblock %}
 {% endblock %}
 
 # Install what is needed for en_US.UTF-8
diff --git a/docker/bifrost/bifrost-base/Dockerfile.j2 b/docker/bifrost/bifrost-base/Dockerfile.j2
index 9efeef674b..72521cbe28 100644
--- a/docker/bifrost/bifrost-base/Dockerfile.j2
+++ b/docker/bifrost/bifrost-base/Dockerfile.j2
@@ -34,7 +34,7 @@ WORKDIR /bifrost
 {% if base_package_type == 'rpm' %}
 {# Remove updated RabbitMQ packages since these are not supported by Bifrost yet. #}
 RUN rm -f /etc/yum.repos.d/rabbitmq_rabbitmq-server.repo \
-    && yum clean all &&  rm -rf /var/yum/cache
+    && dnf clean all &&  rm -rf /var/dnf/cache
 {% elif base_package_type == 'deb' %}
 RUN sed -e "s/.*mariadb.*//Ig" -e "s/.*rabbitmq.*//Ig" -i /etc/apt/sources.list \
     && apt-get purge -y mariadb* mysql*
@@ -55,7 +55,7 @@ RUN echo " " && \
 {%- if base_package_type == 'deb' %}
     apt-get clean && rm -rf /var/lib/apt/lists/*'
 {%- else %}
-    yum clean all && rm -rf /var/yum/cache'
+    dnf clean all && rm -rf /var/dnf/cache'
 {%- endif %}
 {% endblock %}
 {% endif %}
diff --git a/docker/cyborg/cyborg-agent/Dockerfile.j2 b/docker/cyborg/cyborg-agent/Dockerfile.j2
index 97e3790dd8..c50c5fc9fd 100644
--- a/docker/cyborg/cyborg-agent/Dockerfile.j2
+++ b/docker/cyborg/cyborg-agent/Dockerfile.j2
@@ -39,7 +39,7 @@ RUN curl -sSL -o /tmp/opae-libs.rpm ${opae_libs_rpm_url} \
     && echo "${opae_libs_rpm_sha1sum} /tmp/opae-libs.rpm" | sha1sum -c \
     && curl -sSL -o /tmp/opae-devel.rpm ${opae_devel_rpm_url} \
     && echo "${opae_devel_rpm_sha1sum} /tmp/opae-devel.rpm" | sha1sum -c \
-    && yum -y install /tmp/opae-libs.rpm /tmp/opae-devel.rpm \
+    && dnf -y install /tmp/opae-libs.rpm /tmp/opae-devel.rpm \
     && rm -f /tmp/opae-libs.rpm /tmp/opae-devel.rpm
 
 # NOTE(Bai Yongjun) Required packages are only supported Ubuntu16.04
diff --git a/docker/logstash/Dockerfile.j2 b/docker/logstash/Dockerfile.j2
index 66a77296be..3e8bcdb1f4 100644
--- a/docker/logstash/Dockerfile.j2
+++ b/docker/logstash/Dockerfile.j2
@@ -47,7 +47,7 @@ ENV logstash_rpm_url=https://download.elastic.co/logstash/logstash/packages/cent
 ENV logstash_rpm_sha1sum=68c5e78c3d941f06f77d638c0756b6aea715bec5
 RUN curl -sSL -o /tmp/logstash.rpm ${logstash_rpm_url} \
     && echo "${logstash_rpm_sha1sum} /tmp/logstash.rpm" | sha1sum -c \
-    && yum -y install /tmp/logstash.rpm \
+    && dnf -y install /tmp/logstash.rpm \
     && rm -f /tmp/logstash.rpm
 
 {% elif base_package_type == 'deb' %}
diff --git a/kolla/image/build.py b/kolla/image/build.py
index 7f5c833e43..dec484af6f 100755
--- a/kolla/image/build.py
+++ b/kolla/image/build.py
@@ -833,8 +833,8 @@ class KollaWorker(object):
 
         for config in rpm_setup_config:
             if config.endswith('.rpm'):
-                # RPM files can be installed with yum from file path or url
-                cmd = "RUN yum -y install {}".format(config)
+                # RPM files can be installed with dnf from file path or url
+                cmd = "RUN dnf -y install {}".format(config)
             elif config.endswith('.repo'):
                 if config.startswith('http'):
                     # Curl http://url/etc.repo to /etc/yum.repos.d/etc.repo
diff --git a/tools/validate-install-command.sh b/tools/validate-install-command.sh
index bc74096902..eff67d5cfe 100755
--- a/tools/validate-install-command.sh
+++ b/tools/validate-install-command.sh
@@ -3,8 +3,8 @@
 RES=0
 
 for dockerfile in "$@"; do
-    if grep "apt-get install\|yum install" "$dockerfile"; then
-        echo "ERROR: $dockerfile has incorrectly formatted install command Should be in the form 'apt-get|yum -y install ...'" >&2
+    if grep "apt-get install\|dnf install" "$dockerfile"; then
+        echo "ERROR: $dockerfile has incorrectly formatted install command Should be in the form 'apt-get|dnf -y install ...'" >&2
         RES=1
     fi
 done