test(22.04): add LXD backend to Spread

[cjdcordeiro]

Proposed changes

Used LXD as a Spread backend instead of docker. This is to cope with tests that need to perform privileged operations (like mount).

Related issues/PRs

#274 #222

Checklist

• I have read the contributing guidelines
• I have tested my changes (see how)
• I have already submitted the CLA form

Additional Context

See a test here: https://github.com/cjdcordeiro/chisel-releases/actions/runs/10492345808/job/29063655589?pr=17 (note, the ARM64 tests fail cause this is my fork, under my account, which doesn't have access to arm64 runners)

Needs #317 for the CI to pass

[github-actions]

Diff of dependencies:
None found.

---

[rebornplusplus]

See a test here: https://github.com/cjdcordeiro/chisel-releases/actions/runs/10492345808/job/29063655589?pr=17

The test there seems to fail on ARM64. And logs are expired probably. Could you please re-trigger it?

[cjdcordeiro]

See a test here: https://github.com/cjdcordeiro/chisel-releases/actions/runs/10492345808/job/29063655589?pr=17

The test there seems to fail on ARM64. And logs are expired probably. Could you please re-trigger it?

Yes, cause that's my fork. arm runners aren't available to non-enterprise accounts.

Added a note in the description

[rebornplusplus]

The changes look alright to me. Holding approval until #317 is merged and the tests are passing properly here.

[rebornplusplus]

Looks good to me, thank you. The diffs to the merged 24.04 changes are concise.

---

Diff with merged 24.04 changes

diff --git a/spread.yaml b/spread.yaml
index b2bb3b9..bdc21c6 100644
--- a/spread.yaml
+++ b/spread.yaml
@@ -38,9 +38,11 @@ backends:
       ADDRESS `lxc list --format=json $SPREAD_SYSTEM | jq -r '.[0].state.network.eth0.addresses[] | select(.family=="inet") | .address'`
     discard: lxc stop $SPREAD_SYSTEM || true
     systems:
-      - ubuntu-noble:
+      - ubuntu-jammy:
           password: ubuntu
-
+  
+  # The Docker backend is recommended for comprehensive multi-arch tests, but
+  # not ideal for tests that need to perform privileged operations (like "mount"). 
   docker:
     type: adhoc
     allocate: |
@@ -68,17 +70,17 @@ backends:
       ADDRESS `docker inspect $SPREAD_SYSTEM --format '{{.NetworkSettings.Networks.bridge.IPAddress}}'`
     discard: docker rm -f $SPREAD_SYSTEM
     systems:
-      - ubuntu-24.04-amd64:
+      - ubuntu-22.04-amd64:
           password: ubuntu
-      - ubuntu-24.04-arm64v8:
+      - ubuntu-22.04-arm64v8:
           password: ubuntu
-      - ubuntu-24.04-arm32v7:
+      - ubuntu-22.04-arm32v7:
           password: ubuntu
-      - ubuntu-24.04-ppc64le:
+      - ubuntu-22.04-ppc64le:
           password: ubuntu
-      - ubuntu-24.04-s390x:
+      - ubuntu-22.04-s390x:
           password: ubuntu
-      - ubuntu-24.04-riscv64:
+      - ubuntu-22.04-riscv64:
           password: ubuntu
 
 prepare: |