[lxc-devel] [lxc-ci/master] Adds test for LXD VMs

[tomponline on Github]

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From 9e7f5e431d73348d67d1f1a643d8f29c9bead2dd Mon Sep 17 00:00:00 2001
From: Thomas Parrott <thomas.parrott at canonical.com>
Date: Mon, 7 Dec 2020 20:57:38 +0000
Subject: [PATCH] Adds test for LXD VMs

Signed-off-by: Thomas Parrott <thomas.parrott at canonical.com>
---
 bin/test-lxd-vm | 152 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100755 bin/test-lxd-vm

diff --git a/bin/test-lxd-vm b/bin/test-lxd-vm
new file mode 100755
index 0000000..7c51b65
--- /dev/null
+++ b/bin/test-lxd-vm
@@ -0,0 +1,152 @@
+#!/bin/sh
+set -eux
+
+cleanup() {
+    echo ""
+    if [ "${FAIL}" = "1" ]; then
+        echo "Test failed"
+        exit 1
+    fi
+
+    echo "Test passed"
+    exit 0
+}
+
+poolDriverList="${1:-dir btrfs lvm zfs}"
+FAIL=1
+trap cleanup EXIT HUP INT TERM
+
+# Wait for snapd seeding
+sleep 1m
+
+# Configure to use the proxy
+curl -s http://canonical-lxd.stgraber.org/config/snapd.sh | sh
+
+# Install LXD
+while :; do
+    [ ! -e /usr/bin/lxd ] && break
+    apt remove --purge lxd lxd-client --yes && break
+done
+snap install lxd --edge
+snap install jq
+snap refresh lxd --channel=latest/edge
+lxd waitready --timeout=300
+
+# Configure LXD
+lxc network create lxdbr0 
+lxc profile device add default eth0 nic network=lxdbr0
+
+for poolDriver in $poolDriverList
+do
+	echo "==> Create storage pool using driver ${poolDriver}"
+        if [ "${poolDriver}" = "dir" ]; then
+		lxc storage create vmpool "${poolDriver}"
+	else
+		lxc storage create vmpool "${poolDriver}" size=20GB
+	fi
+
+	echo "==> Create VM and boot"
+	lxc init images:ubuntu/20.04/cloud v1 --vm -s vmpool
+	lxc start v1
+	sleep 60
+	lxc info v1
+
+	echo "==> Checking VM root disk size is 10GB"
+	lxc exec v1 -- df -B1000000000 | grep sda2 | grep 10
+
+	echo "==> Increasing VM root disk size for next boot"
+	lxc config device set v1 root size=11GB
+	lxc config get v1 volatile.root.apply_quota | grep 11GB
+	lxc stop -f v1
+	lxc start v1
+	sleep 60
+
+	echo "==> Checking VM root disk size is 11GB"
+	lxc exec v1 -- df -B1000000000 | grep sda2 | grep 11
+
+	echo "==> Check VM shrink is blocked"
+	! lxc config device set v1 root size=10GB || false
+
+	echo "==> Deleting VM"
+	lxc delete -f v1
+
+	echo "==> Change volume.size on pool and create VM"
+	lxc storage set vmpool volume.size 6GB
+	lxc init images:ubuntu/20.04/cloud v1 --vm -s vmpool
+        lxc start v1
+        sleep 60
+        lxc info v1
+
+        echo "==> Checking VM root disk size is 6GB"
+        lxc exec v1 -- df -B1000000000 | grep sda2 | grep 6
+
+        echo "==> Deleting VM and reset pool volume.size"
+        lxc delete -f v1
+	lxc storage unset vmpool volume.size
+
+	if [ "${poolDriver}" = "lvm" ]; then
+        	echo "==> Change volume.block.filesystem on pool and create VM"
+		lxc storage set vmpool volume.block.filesystem xfs
+		lxc init images:ubuntu/20.04/cloud v1 --vm -s vmpool
+		lxc start v1
+		sleep 60
+		lxc info v1
+
+		echo "==> Checking VM config disk filesyste is XFS"
+		serverPID="$(lxc query /1.0 | jq .environment.server_pid)"
+		nsenter -m -t "${serverPID}" stat -f -c %T /var/snap/lxd/common/lxd/virtual-machines/v1 | grep xfs
+
+		echo "==> Deleting VM"
+		lxc delete -f v1
+		lxc storage unset vmpool volume.block.filesystem
+	fi
+
+	echo "==> Create VM from profile with small disk size"
+	lxc profile copy default vmsmall
+	lxc profile device add vmsmall root disk pool=vmpool path=/ size=7GB
+        lxc init images:ubuntu/20.04/cloud v1 --vm -p vmsmall
+        lxc start v1
+        sleep 60
+        lxc info v1
+
+        echo "==> Checking VM root disk size is 7GB"
+        lxc exec v1 -- df -B1000000000 | grep sda2 | grep 7
+	lxc stop -f v1
+
+	echo "==> Copy to different storage pool and check size"
+	dstPoolDriver=zfs # Use ZFS storage pool as that fixed volumes not files.
+	if [ "${poolDriver}" = "zfs" ]; then
+		dstPoolDriver=lvm # Use something different when testing ZFS.
+	fi
+
+	lxc storage create vmpool2 "${dstPoolDriver}" size=20GB
+	lxc copy v1 v2 -s vmpool2
+	lxc start v2
+	sleep 60
+	lxc info v2
+
+        echo "==> Checking copied VM root disk size is 7GB"
+        lxc exec v2 -- df -B1000000000 | grep sda2 | grep 7
+        lxc delete -f v2
+
+        echo "==> Grow above default voume size and copy to different storage pool"
+	lxc config device override v1 root size=11GB
+        lxc copy v1 v2 -s vmpool2
+        lxc start v2
+        sleep 60
+        lxc info v2
+
+        echo "==> Checking copied VM root disk size is 11GB"
+        lxc exec v2 -- df -B1000000000 | grep sda2 | grep 11
+        lxc delete -f v2
+
+        echo "==> Deleting VM and vmsmall profile"
+        lxc delete -f v1
+        lxc profile delete vmsmall
+
+        echo "==> Deleting storage pool"
+        lxc storage delete vmpool2
+        lxc storage delete vmpool
+done
+
+FAIL=0