Merge pull request #14912 from edsantiago/ci_confirm_runtime

[CI:DOCS] CI: sanity check for desired runtime

.cirrus.yml

@@ -167,14 +167,18 @@ build_task:
               VM_IMAGE_NAME: ${FEDORA_CACHE_IMAGE_NAME}
               CTR_FQIN: ${FEDORA_CONTAINER_FQIN}
               # ID for re-use of build output
+              CI_DESIRED_RUNTIME: crun
         - env: &priorfedora_envvars
               DISTRO_NV: ${PRIOR_FEDORA_NAME}
               VM_IMAGE_NAME: ${PRIOR_FEDORA_CACHE_IMAGE_NAME}
               CTR_FQIN: ${PRIOR_FEDORA_CONTAINER_FQIN}
+              CI_DESIRED_RUNTIME: crun
         - env: &ubuntu_envvars
               DISTRO_NV: ${UBUNTU_NAME}
               VM_IMAGE_NAME: ${UBUNTU_CACHE_IMAGE_NAME}
               CTR_FQIN: ${UBUNTU_CONTAINER_FQIN}
+              # FIXME 2022-07-12: change to runc once #14833 is fixed!
+              CI_DESIRED_RUNTIME: crun
     env:
         TEST_FLAVOR: build
     clone_script: *full_clone

contrib/cirrus/runner.sh

@@ -236,6 +236,16 @@ function _run_build() {
     make clean
     make vendor
     make podman-release  # includes podman, podman-remote, and docs
+
+    # Last-minute confirmation that we're testing the desired runtime.
+    # This Can't Possibly Fail™ in regular CI; only when updating VMs.
+    # $CI_DESIRED_RUNTIME must be defined in .cirrus.yml.
+    req_env_vars CI_DESIRED_RUNTIME
+    runtime=$(bin/podman info --format '{{.Host.OCIRuntime.Name}}')
+    # shellcheck disable=SC2154
+    if [[ "$runtime" != "$CI_DESIRED_RUNTIME" ]]; then
+        die "Built podman is using '$runtime'; this CI environment requires $CI_DESIRED_RUNTIME"
+    fi
 }
 
 function _run_altbuild() {