Fix building Ubuntu 20.04 focal amphorae

Ubuntu 20.04 is a "Tested Runtime" for the Victoria release[1].
This patch updated our diskimage-create script and elements to
support building a amphora image that uses Ubuntu 20.04 (focal).

[1] https://governance.openstack.org/tc/reference/runtimes/victoria.html

Change-Id: I6f53ea5d012ab64b985d981ecd1b1967e18e4e81

diskimage-create/diskimage-create.sh

@@ -420,10 +420,8 @@ AMP_element_sequence="$AMP_element_sequence ${AMP_BASEOS}"
 
 if [ "$AMP_PACKAGE_INSTALL" -eq 1 ]; then
     export DIB_INSTALLTYPE_amphora_agent=package
-else
-    # We will need pip for amphora-agent
-    AMP_element_sequence="$AMP_element_sequence pip-and-virtualenv"
 fi
+
 # Add our backend element (haproxy, etc.)
 AMP_element_sequence="$AMP_element_sequence $AMP_BACKEND"
 

elements/amphora-agent/install.d/amphora-agent-source-install/75-amphora-agent-install

@@ -9,8 +9,7 @@ set -o pipefail
 SCRIPTDIR=$(dirname $0)
 AMP_VENV=/opt/amphora-agent-venv
 
-# Create a virtual environment to contain the amphora agent
-${DIB_PYTHON} -m virtualenv $AMP_VENV
+/usr/bin/python3 -m venv $AMP_VENV
 
 $AMP_VENV/bin/pip install pip --upgrade
 

elements/amphora-agent/package-installs.yaml

@@ -6,8 +6,14 @@ libffi-dev:
   build-only: True
 libssl-dev:
   build-only: True
-python-dev:
+python3-dev:
   build-only: True
+  installtype: source
+python3-pip:
+  installtype: source
+python3:
+python3-venv:
+  installtype: source
 
 acl:
 # Note: Red Hat family does not currently ship acpid for ppc64le.

elements/amphora-agent/pkg-map

@@ -3,7 +3,9 @@
     "rhel": {
       "8": {
         "isc-dhcp-client": "dhcp-client",
-        "python-dev": "platform-python-devel",
+        "python3-dev": "platform-python-devel",
+        "python3-venv": "python3-virtualenv",
+        "python3": "python36",
         "vlan": "",
         "screen": "",
         "dkms": ""
@@ -12,11 +14,18 @@
     "centos": {
       "8": {
         "isc-dhcp-client": "dhcp-client",
-        "python-dev": "platform-python-devel",
+        "python3-dev": "platform-python-devel",
+        "python3-venv": "python3-virtualenv",
+        "python3": "python36",
         "vlan": "",
         "screen": "",
         "dkms": ""
       }
+    },
+    "ubuntu": {
+      "focal": {
+        "ureadahead": ""
+      }
     }
   },
   "family": {

elements/amphora-agent/post-install.d/10-enable-network-scripts

@@ -10,3 +10,7 @@ set -o pipefail
 if [[ "$DISTRO_NAME" =~ (rhel|centos) ]] && [ "$DIB_RELEASE" == "8" ]; then
     chkconfig network on
 fi
+
+if [[ "$DISTRO_NAME" =~ (ubuntu) ]] && [ "$DIB_RELEASE" == "focal" ]; then
+    systemctl enable systemd-networkd
+fi