From 1ab3a7fa2496468c9d746e218faaac6f43dc6407 Mon Sep 17 00:00:00 2001
From: Gabriel Mougard <gabriel.mougard@canonical.com>
Date: Fri, 24 May 2024 10:12:44 +0200
Subject: [PATCH] tests: Add an interactive MicroCloud test with IPv6 disabled
 and IPv4 disabled

Signed-off-by: Gabriel Mougard <gabriel.mougard@canonical.com>
---
 test/includes/microcloud.sh |  9 ++++++++-
 test/suites/basic.sh        | 40 +++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/test/includes/microcloud.sh b/test/includes/microcloud.sh
index 0e929aa2c..208a33417 100644
--- a/test/includes/microcloud.sh
+++ b/test/includes/microcloud.sh
@@ -5,7 +5,7 @@ unset_interactive_vars() {
   unset LOOKUP_IFACE LIMIT_SUBNET SKIP_SERVICE EXPECT_PEERS REUSE_EXISTING REUSE_EXISTING_COUNT \
     SETUP_ZFS ZFS_FILTER ZFS_WIPE \
     SETUP_CEPH CEPH_WARNING CEPH_FILTER CEPH_WIPE SETUP_CEPHFS \
-    SETUP_OVN OVN_WARNING OVN_FILTER IPV4_SUBNET IPV4_START IPV4_END DNS_ADDRESSES IPV6_SUBNET
+    PROCEED_WITH_NO_OVERLAY_NETWORKING SETUP_OVN OVN_WARNING OVN_FILTER IPV4_SUBNET IPV4_START IPV4_END DNS_ADDRESSES IPV6_SUBNET
 }
 
 # microcloud_interactive: outputs text that can be passed to `TEST_CONSOLE=1 microcloud init`
@@ -27,6 +27,7 @@ microcloud_interactive() {
   CEPH_WARNING=${CEPH_WARNING:-}                  # (yes/no) input for warning about eligible disk detection.
   CEPH_FILTER=${CEPH_FILTER:-}                    # filter string for CEPH disks.
   CEPH_WIPE=${CEPH_WIPE:-}                        # (yes/no) to wipe all disks.
+  PROCEED_WITH_NO_OVERLAY_NETWORKING=${PROCEED_WITH_NO_OVERLAY_NETWORKING:-} # (yes/no) input for proceeding without overlay networking.
   SETUP_OVN=${SETUP_OVN:-}                        # (yes/no) input for initiating OVN network setup.
   OVN_WARNING=${OVN_WARNING:-}                    # (yes/no) input for warning about eligible interface detection.
   OVN_FILTER=${OVN_FILTER:-}                      # filter string for OVN interfaces.
@@ -86,6 +87,12 @@ $(true)                                                 # workaround for set -e
 "
 fi
 
+if [ -n "${PROCEED_WITH_NO_OVERLAY_NETWORKING}" ]; then
+  setup="${setup}
+${PROCEED_WITH_NO_OVERLAY_NETWORKING}                   # agree to proceed without overlay networking (neither FAN nor OVN networking) (yes/no)
+$(true)                                                 # workaround for set -e
+"
+fi
 
 if [ -n "${SETUP_OVN}" ]; then
   setup="${setup}
diff --git a/test/suites/basic.sh b/test/suites/basic.sh
index 155af598e..8c3964c6d 100644
--- a/test/suites/basic.sh
+++ b/test/suites/basic.sh
@@ -41,6 +41,46 @@ test_interactive() {
     validate_system_lxd "${m}" 3 disk1
   done
 
+  # Reset the systems with just LXD and no IPv6 support.
+  reset_systems 3 3 1
+
+  for m in micro01 micro02 micro03 ; do
+    lxc exec "${m}" -- echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
+    lxc exec "${m}" -- snap disable microceph || true
+    lxc exec "${m}" -- snap disable microovn || true
+    lxc exec "${m}" -- snap restart microcloud
+  done
+
+  echo "Creating a MicroCloud with ZFS storage and no IPv6 support"
+  microcloud_interactive | lxc exec micro01 -- sh -c "microcloud init > out"
+
+  lxc exec micro01 -- tail -1 out | grep "MicroCloud is ready" -q
+  for m in micro01 micro02 micro03 ; do
+    validate_system_lxd "${m}" 3 disk1
+  done
+
+  # Reset the systems with just LXD and no IPv4 support.
+  gw_net_addr=$(lxc network get lxdbr0 ipv4.address)
+  lxc network set lxdbr0 ipv4.address none
+  reset_systems 3 3 1
+
+  for m in micro01 micro02 micro03 ; do
+    lxc exec "${m}" -- snap disable microceph || true
+    lxc exec "${m}" -- snap disable microovn || true
+    lxc exec "${m}" -- snap restart microcloud
+  done
+
+  export PROCEED_WITH_NO_OVERLAY_NETWORKING="no" # This will avoid to setup the cluster if no overlay networking is available.
+  echo "Creating a MicroCloud with ZFS storage and no IPv4 support"
+  ! microcloud_interactive | lxc exec micro01 -- sh -c "microcloud init 2> err" || false
+
+  # Ensure we error out due to a lack of usable overlay networking.
+  lxc exec micro01 -- cat err | grep "cluster bootstrapping aborted due to lack of usable networking" -q
+
+  # Set the IPv4 address back to the original value.
+  lxc network set lxdbr0 ipv4.address "${gw_net_addr}"
+  unset PROCEED_WITH_NO_OVERLAY_NETWORKING
+
   # Reset the systems and install microceph.
   reset_systems 3 3 1