Support RHEL base image in DIB

This adds a rhel type and gives some pointers on needed environment
variables for base image, registration, needed subscriptions.

no-resolvconf is also updated to work on rhel-type systems

Depends-On: Icb0e20b01479fea345e01309fc4bf3f7f639900c
Change-Id: Ic452feaf32fe7699ebd072f21dd630a2ac93bb5f

diskimage-create/README.rst

@@ -93,7 +93,7 @@ Command syntax:
             [-b **haproxy** ]
             [-c **~/.cache/image-create** | <cache directory> ]
             [-h]
-            [-i **ubuntu** | fedora | centos ]
+            [-i **ubuntu** | fedora | centos | rhel ]
             [-o **amphora-x64-haproxy** | <filename> ]
             [-r <root password> ]
             [-s **5** | <size in GB> ]
@@ -159,9 +159,42 @@ ELEMENTS_REPO_PATH
 
 OCTAVIA_REPO_PATH
     - Directory containing octavia
-    - <directory above the script location>
+    - Default: <directory above the script location>
     - Reference: https://github.com/openstack/octavia
 
+RHEL specific variables
+------------------------
+Building a RHEL-based image requires:
+    - a RHEL 7 base cloud image, manually download from the
+      Red Hat Customer Portal. Set the DIB_LOCAL_IMAGE variable
+      to point to the file. More details at:
+      <DIB_REPO_PATH>/elements/rhel7
+
+    - a Red Hat subscription for the matching Red Hat OpenStack Platform
+      repository. Set the needed registration parameters depending on your
+      configuration. More details at:
+      <DIB_REPO_PATH>/elements/rhel-common
+
+Here is an example with Customer Portal registration and OSP 8 repository:
+.. code:: bash
+
+    $ export DIB_LOCAL_IMAGE='/tmp/rhel-guest-image-7.2-20160302.0.x86_64.qcow2'
+
+    $ export REG_METHOD='portal' REG_REPOS='rhel-7-server-openstack-8-rpms'
+
+    $ export REG_USER='<user>' REG_PASSWORD='<password>' REG_AUTO_ATTACH=true
+
+This example uses registration via a Satellite (the activation key must enable
+an OSP repository):
+.. code:: bash
+
+    $ export DIB_LOCAL_IMAGE='/tmp/rhel-guest-image-7.2-20160302.0.x86_64.qcow2'
+
+    $ export REG_METHOD='satellite' REG_ACTIVATION_KEY="<activation key>"
+
+    $ export REG_SAT_URL="<satellite url>" REG_ORG="<satellite org>"
+
+
 Container Support
 =================
 The Docker command line required to import a tar file created with this script

diskimage-create/diskimage-create.sh

@@ -24,7 +24,7 @@ usage() {
     echo "            [-b **haproxy** ]"
     echo "            [-c **~/.cache/image-create** | <cache directory> ]"
     echo "            [-h]"
-    echo "            [-i **ubuntu** | fedora | centos ]"
+    echo "            [-i **ubuntu** | fedora | centos | rhel ]"
     echo "            [-o **amphora-x64-haproxy** | <filename> ]"
     echo "            [-r <root password> ]"
     echo "            [-s **5** | <size in GB> ]"
@@ -88,7 +88,8 @@ while getopts "a:b:c:hi:o:t:r:s:vw:" opt; do
             AMP_BASEOS=$OPTARG
             if [ $AMP_BASEOS != "ubuntu" ] && \
                 [ $AMP_BASEOS != "fedora" ] && \
-                [ $AMP_BASEOS != "centos" ]; then
+                [ $AMP_BASEOS != "centos" ] && \
+                [ $AMP_BASEOS != "rhel" ]; then
                 echo "Error: Unsupported base OS " $AMP_BASEOS " specified"
                 exit 3
             fi
@@ -194,6 +195,15 @@ fi
 
 export CLOUD_INIT_DATASOURCES=${CLOUD_INIT_DATASOURCES:-"ConfigDrive"}
 
+# Additional RHEL environment checks
+if [ "${AMP_BASEOS}" = "rhel" ]; then
+    if [ -z "${DIB_LOCAL_IMAGE}" ]; then
+        echo "DIB_LOCAL_IMAGE variable must be set and point to a RHEL 7 base cloud image. Exiting."
+        echo "For more information, see the README file in ${DIB_ELEMENTS_PATH}/elements/rhel7"
+        exit 1
+    fi
+fi
+
 # Find out what platform we are on
 if [ -e /etc/os-release ]; then
     platform=$(head -1 /etc/os-release)
@@ -206,7 +216,7 @@ else
 fi
 
 if [ "$AMP_ROOTPW" ] && [ "$platform" != 'NAME="Ubuntu"' ]; then
-    if [ "$(getenforce)" != "Disabled" ]; then
+    if [ "$(getenforce)" == "Enforcing" ]; then
         echo "A root password cannot be enabled for images built on this platform while SELinux is enabled."
         exit 1
     fi
@@ -321,6 +331,9 @@ elif [ "$AMP_BASEOS" = "centos" ]; then
         AMP_element_sequence="$AMP_element_sequence centos-mirror"
         export CENTOS_MIRROR="$BASE_OS_MIRROR"
     fi
+elif [ "$AMP_BASEOS" = "rhel" ]; then
+    AMP_element_sequence=${AMP_element_sequence:-"base vm rhel7"}
+    AMP_element_sequence="$AMP_element_sequence $AMP_BACKEND"
 fi
 
 if [ "$AMP_ROOTPW" ]; then

elements/centos-mirror/README.rst

@@ -6,4 +6,4 @@ variable.
 
 .. code:: bash
 
-    $ export UBUNTU_MIRROR=http://<local mirror hostname>/<path to mirror>
+    $ export CENTOS_MIRROR=http://<local mirror hostname>/<path to mirror>

elements/fedora-mirror/README.rst

@@ -6,4 +6,4 @@ variable.
 
 .. code:: bash
 
-    $ export UBUNTU_MIRROR=http://<local mirror hostname>/<path to mirror>
+    $ export FEDORA_MIRROR=http://<local mirror hostname>/<path to mirror>

elements/no-resolvconf/finalise.d/99-disable-resolv-conf

@@ -1,7 +1,16 @@
 #!/bin/bash
 echo "" > /etc/resolv.conf
 echo "" > /etc/resolv.conf.ORIG
-echo "#!/bin/sh
+if [ -d /etc/dhcp/dhclient-enter-hooks.d ]
+then
+    # Debian/Ubuntu
+    echo "#!/bin/sh
 make_resolv_conf() { : ; }" > /etc/dhcp/dhclient-enter-hooks.d/noresolvconf
-chmod +x /etc/dhcp/dhclient-enter-hooks.d/noresolvconf
-rm -f /etc/dhcp/dhclient-enter-hooks.d/resolvconf
+    chmod +x /etc/dhcp/dhclient-enter-hooks.d/noresolvconf
+    rm -f /etc/dhcp/dhclient-enter-hooks.d/resolvconf
+else
+    # RHEL/CentOS/Fedora
+    echo "#!/bin/sh
+make_resolv_conf() { : ; }" > /etc/dhclient-enter-hooks
+    chmod +x /etc/dhclient-enter-hooks
+fi