Adds genisoimage for cloud-init

Userdata is not able to be generated as a config drive
due to missing package in snap.

Change snap build to explicitly install LXD as confined
snap.

Change-Id: If03923a7a8223a9eec4e49bd612d39b231e788fb
Closes-Bug: 1884320
Signed-off-by: beierlm <mark.beierl@canonical.com>

snapcraft.yaml

@@ -572,6 +572,8 @@ parts:
       - uca-sources
     source: patches/
     plugin: dump
+    build-packages:
+      - curl
     override-build: |
       # Create ${SNAPCRAFT_STAGE}/patches/upper-constraints
 
@@ -830,6 +832,7 @@ parts:
     - dmidecode
     - dnsmasq
     - iptables
+    - genisoimage
     - libxml2
     - libyajl2
     - try: [libnuma1]

tools/lxd_build.sh

@@ -10,9 +10,16 @@ sudo apt install -y firefox-geckodriver python3-petname python3-selenium
 
 # Setup snapd and snapcraft
 sudo apt install -y snapd
-sudo snap install --classic snapcraft
-sudo snap install --classic lxd
-sudo lxd init --auto
 
 # Build our snap!
-sudo snapcraft --use-lxd
+sudo snap install --classic snapcraft
+sudo snap install lxd
+
+sudo usermod -a -G lxd ${USER}
+
+# Since the current shell does not have the lxd group gid, use newgrp.
+newgrp lxd << END
+set -ex
+lxd init --auto
+snapcraft --use-lxd
+END