qemu: use 9p by default

Templates for the following distro are updated to continue using reverse-sshfs, as 9p is not available on them. - AlmaLinux - CentOS Stream - Debian - openSUSE - Oracle Linux - Rocky Linux Close issue 971 Signed-off-by: Akihiro Suda <[email protected]>
lima-vm · Jul 2, 2024 · 854a0a0 · 854a0a0
1 parent 912d29b
commit 854a0a0
Show file tree

Hide file tree

Showing 15 changed files with 50 additions and 3 deletions.
diff --git a/examples/almalinux-8.yaml b/examples/almalinux-8.yaml
@@ -16,6 +16,8 @@ images:
  arch: "x86_64"
 - location: "https://repo.almalinux.org/almalinux/8/cloud/aarch64/images/AlmaLinux-8-GenericCloud-latest.aarch64.qcow2"
  arch: "aarch64"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/almalinux-9.yaml b/examples/almalinux-9.yaml
@@ -13,6 +13,8 @@ images:
  arch: "x86_64"
 - location: "https://repo.almalinux.org/almalinux/9/cloud/aarch64/images/AlmaLinux-9-GenericCloud-latest.aarch64.qcow2"
  arch: "aarch64"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/centos-stream-9.yaml b/examples/centos-stream-9.yaml
@@ -14,6 +14,8 @@ images:
  arch: "x86_64"
 - location: "https://cloud.centos.org/centos/9-stream/aarch64/images/CentOS-Stream-GenericCloud-9-latest.aarch64.qcow2"
  arch: "aarch64"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/debian-11.yaml b/examples/debian-11.yaml
@@ -14,6 +14,8 @@ images:
 - location: "https://cloud.debian.org/images/cloud/bullseye/latest/debian-11-genericcloud-arm64.qcow2"
  arch: "aarch64"
 
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/debian-12.yaml b/examples/debian-12.yaml
@@ -14,6 +14,8 @@ images:
 - location: "https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-genericcloud-arm64.qcow2"
  arch: "aarch64"
 
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/default.yaml b/examples/default.yaml
@@ -99,7 +99,7 @@ mounts:
 
 # Mount type for above mounts, such as "reverse-sshfs" (from sshocker), "9p" (EXPERIMENTAL (until Lima v1.0), from QEMU’s virtio-9p-pci, aka virtfs),
 # or "virtiofs" (EXPERIMENTAL, needs `vmType: vz`)
-# 🟢 Builtin default: "reverse-sshfs" (for QEMU), "virtiofs" (for vz)
+# 🟢 Builtin default: "9p" (for QEMU, since Lima v1.0), "virtiofs" (for vz)
 mountType: null
 
 # Enable inotify support for mounted directories (EXPERIMENTAL)

diff --git a/examples/experimental/opensuse-tumbleweed.yaml b/examples/experimental/opensuse-tumbleweed.yaml
@@ -17,6 +17,8 @@ images:
 - location: "https://provo-mirror.opensuse.org/ports/aarch64/tumbleweed/appliances/openSUSE-Tumbleweed-ARM-JeOS-efi.aarch64.qcow2"
  arch: "aarch64"
 
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/opensuse.yaml b/examples/opensuse.yaml
@@ -5,6 +5,8 @@ images:
  arch: "x86_64"
 - location: "https://download.opensuse.org/distribution/leap/15.5/appliances/openSUSE-Leap-15.5-Minimal-VM.aarch64-Cloud.qcow2"
  arch: "aarch64"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/oraclelinux-8.yaml b/examples/oraclelinux-8.yaml
@@ -12,6 +12,8 @@ images:
 - location: "https://yum.oracle.com/templates/OracleLinux/OL8/u10/aarch64/OL8U10_aarch64-kvm-cloud-b100.qcow2"
  arch: "aarch64"
  digest: "sha256:def7b8055e275507a593f07dc6076a2adc5967af046c003072b479e69f25f407"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/oraclelinux-9.yaml b/examples/oraclelinux-9.yaml
@@ -9,6 +9,8 @@ images:
 - location: "https://yum.oracle.com/templates/OracleLinux/OL9/u4/aarch64/OL9U4_aarch64-kvm-cloud-b90.qcow2"
  arch: "aarch64"
  digest: "sha256:1f4e20190e87c76e8c3b4a9e15e660972386cbfa4f128e5cdcd8faa43a713d44"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/rocky-8.yaml b/examples/rocky-8.yaml
@@ -16,6 +16,8 @@ images:
  arch: "x86_64"
 - location: "https://dl.rockylinux.org/pub/rocky/8/images/aarch64/Rocky-8-GenericCloud.latest.aarch64.qcow2"
  arch: "aarch64"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/examples/rocky-9.yaml b/examples/rocky-9.yaml
@@ -13,6 +13,8 @@ images:
  arch: "x86_64"
 - location: "https://dl.rockylinux.org/pub/rocky/9/images/aarch64/Rocky-9-GenericCloud.latest.aarch64.qcow2"
  arch: "aarch64"
+# The mount type is set to reverse-sshfs because 9p (default for QEMU) is not supported by the guest kernel. VZ users should specify `--mount-type=virtiofs` on `limactl create` for better performance.
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
 - location: "/tmp/lima"

diff --git a/hack/test-templates/test-misc.yaml b/hack/test-templates/test-misc.yaml
@@ -1,5 +1,6 @@
 # The test template for testing misc configurations:
 # - disk
+# - snapshots
 # - (More to come)
 #
 # This template requires Lima v0.14.0 or later.
@@ -18,6 +19,8 @@ images:
 - location: "https://cloud-images.ubuntu.com/releases/24.04/release/ubuntu-24.04-server-cloudimg-arm64.img"
  arch: "aarch64"
 
+# 9p is not compatible with `limactl snapshot`
+mountType: "reverse-sshfs"
 mounts:
 - location: "~"
  writable: true

diff --git a/pkg/limayaml/defaults.go b/pkg/limayaml/defaults.go
@@ -551,9 +551,12 @@ func FillDefault(y, d, o *LimaYAML, filePath string) {
  y.MountType = o.MountType
  }
  if y.MountType == nil || *y.MountType == "" {
- if *y.VMType == VZ {
+ switch *y.VMType {
+ case VZ:
  y.MountType = ptr.Of(VIRTIOFS)
- } else {
+ case QEMU:
+ y.MountType = ptr.Of(NINEP)
+ default:
  y.MountType = ptr.Of(REVSSHFS)
  }
  }

diff --git a/website/content/en/docs/faq/_index.md b/website/content/en/docs/faq/_index.md
@@ -32,6 +32,7 @@ weight: 6
 - [Filesystem sharing](#filesystem-sharing)
  - ["Filesystem is slow"](#filesystem-is-slow)
  - ["Filesystem is not writable"](#filesystem-is-not-writable)
+ - ["Filesystem is unmounted after upgrading Lima to v1.0 (pre-release)"](#filesystem-is-unmounted-after-upgrading-lima-to-v10-pre-release)
 - [External projects](#external-projects)
  - ["I am using Rancher Desktop. How to deal with the underlying Lima?"](#i-am-using-rancher-desktop-how-to-deal-with-the-underlying-lima)
 - ["Hints for debugging other problems?"](#hints-for-debugging-other-problems)
@@ -230,6 +231,24 @@ mounts:
 
 Run `limactl edit <INSTANCE>` to open the YAML editor for an existing instance.
 
+#### "Filesystem is unmounted after upgrading Lima to v1.0 (pre-release)"
+
+Lima v1.0 (pre-release) changed the default mount driver for QEMU from `reverse-sshfs` to `9p`.
+
+This change is known to be incompatible with the following guest operating systems:
+- AlmaLinux, CentOS Stream, Oracle Linux, and RockyLinux
+- Debian GNU/Linux
+- openSUSE
+
+A new instance of these OS still use `reverse-sshfs` by default, however,
+an existing instance created with a previous version of Lima needs running the following command:
+
+```
+limactl edit --mount-type=reverse-sshfs <NAME>
+```
+
+Ubuntu users are not affected by this issue.
+
 ### External projects
 #### "I am using Rancher Desktop. How to deal with the underlying Lima?"