Skip containerd setup on images without systemd

They cannot work, so there is no point in running them.

Show an optional requirements failure to the user instead.

Signed-off-by: Jan Dubois <[email protected]>

Author: jandubois

pkg/cidata/user-data.TEMPLATE

@@ -146,11 +146,14 @@ write_files:
    owner: root:root
    path: /var/lib/cloud/scripts/per-boot/10-alpine-prep.boot.sh
    permissions: '0755'
+ {{- if .Containerd.User}}
  - content: |
       #!/bin/bash
       set -eux -o pipefail
 
-      {{- if .Containerd.User}}
+      # This script does not work unless systemd is available
+      command -v systemctl 2>&1 >/dev/null || exit 0
+
       # Set up env
       for f in .profile .bashrc; do
         if ! grep -q "# Lima BEGIN" "/home/{{.User}}.linux/$f"; then
@@ -194,7 +197,14 @@ write_files:
 
       # Start systemd session
       loginctl enable-linger "{{.User}}"
-      {{- end}}
+   owner: root:root
+   # We do not use per-once.
+   path: /var/lib/cloud/scripts/per-boot/20-rootless-base.boot.sh
+   permissions: '0755'
+ {{- end}}
+ - content: |
+      #!/bin/bash
+      set -eux -o pipefail
 
       # Create mount points
       {{- range $val := .Mounts}}
@@ -218,12 +228,13 @@ write_files:
       fi
    owner: root:root
    # We do not use per-once.
-   path: /var/lib/cloud/scripts/per-boot/20-base.boot.sh
+   path: /var/lib/cloud/scripts/per-boot/25-guestagent-base.boot.sh
    permissions: '0755'
  {{- if or .Mounts .Containerd.System .Containerd.User }}
  - content: |
       #!/bin/bash
       set -eux -o pipefail
+
       # Install minimum dependencies
       if command -v apt-get 2>&1 >/dev/null; then
         export DEBIAN_FRONTEND=noninteractive
@@ -276,6 +287,10 @@ write_files:
  - content: |
       #!/bin/bash
       set -eux -o pipefail
+
+      # This script does not work unless systemd is available
+      command -v systemctl 2>&1 >/dev/null || exit 0
+
       if [ ! -x /usr/local/bin/nerdctl ]; then
         mkdir -p -m 600 /mnt/lima-cidata
         mount -t iso9660 -o ro /dev/disk/by-label/cidata /mnt/lima-cidata

pkg/hostagent/requirements.go

@@ -26,6 +26,12 @@ func (a *HostAgent) waitForRequirements(ctx context.Context, label string, requi
 				a.l.Infof("The %s requirement %d of %d is satisfied", label, i+1, len(requirements))
 				break retryLoop
 			}
+			if req.fatal {
+				a.l.Infof("No further %s requirements will be checked", label)
+				return multierror.Append(mErr,
+					errors.Wrapf(err, "failed to satisfy the %s requirement %d of %d %q: %s; skipping further checks",
+						label, i+1, len(requirements), req.description, req.debugHint))
+			}
 			if j == retries-1 {
 				mErr = multierror.Append(mErr,
 					errors.Wrapf(err, "failed to satisfy the %s requirement %d of %d %q: %s",
@@ -52,6 +58,7 @@ type requirement struct {
 	description string
 	script      string
 	debugHint   string
+	fatal       bool
 }
 
 func (a *HostAgent) essentialRequirements() []requirement {
@@ -117,20 +124,37 @@ A possible workaround is to run "lima-guestagent install-systemd" in the guest.
 func (a *HostAgent) optionalRequirements() []requirement {
 	req := make([]requirement, 0)
 	if *a.y.Containerd.System || *a.y.Containerd.User {
-		req = append(req, requirement{
-			description: "containerd binaries to be installed",
-			script: `#!/bin/bash
+		req = append(req,
+			requirement{
+				description: "systemd must be available",
+				fatal:       true,
+				script: `#!/bin/bash
+set -eux -o pipefail
+if ! command -v systemctl 2>&1 >/dev/null; then
+    echo >&2 "systemd is not available on this OS"
+    exit 1
+fi
+`,
+				debugHint: `systemd is required to run containerd, but does not seem to be available.
+Make sure that you use an image that supports systemd. If you do not want to run
+containerd, please make sure that both 'container.system' and 'containerd.user'
+are set to 'false' in the config file.
+`,
+			},
+			requirement{
+				description: "containerd binaries to be installed",
+				script: `#!/bin/bash
 set -eux -o pipefail
 if ! timeout 30s bash -c "until command -v nerdctl; do sleep 3; done"; then
 	echo >&2 "nerdctl is not installed yet"
 	exit 1
 fi
 `,
-			debugHint: `The nerdctl binary was not installed in the guest.
+				debugHint: `The nerdctl binary was not installed in the guest.
 Make sure that you are using an officially supported image.
 Also see "/var/log/cloud-init-output.log" in the guest.
 `,
-		})
+			})
 	}
 	for _, probe := range a.y.Probes {
 		if probe.Mode == limayaml.ProbeModeReadiness {