[libvirt] Remove hugepages creation test

The tests is useless as libvirt is not running in the pod
cgroup so pod settings are not applied to it.

Change-Id: Ice3957c800e29a0885a341103c453c4d6c921fd3

libvirt/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm libvirt
 name: libvirt
-version: 0.1.33
+version: 0.1.34
 home: https://libvirt.org
 sources:
   - https://libvirt.org/git/?p=libvirt.git;a=summary

libvirt/templates/bin/_libvirt.sh.tpl

@@ -24,13 +24,6 @@ if [ -f /tmp/vnc.crt ]; then
   mv /tmp/vnc-ca.crt /etc/pki/libvirt-vnc/ca-cert.pem
 fi
 
-# TODO: We disable cgroup functionality for cgroup v2, we should fix this in the future
-if $(stat -fc %T /sys/fs/cgroup/ | grep -q cgroup2fs); then
-  CGROUP_VERSION=v2
-else
-  CGROUP_VERSION=v1
-fi
-
 if [ -n "$(cat /proc/*/comm 2>/dev/null | grep -w libvirtd)" ]; then
   set +x
   for proc in $(ls /proc/*/comm 2>/dev/null); do
@@ -82,41 +75,6 @@ if [ 0"$hp_count" -gt 0 ]; then
     echo "ERROR: Hugepages configured in kernel, but libvirtd container cannot access /dev/hugepages"
     exit 1
   fi
-
-  if [ $CGROUP_VERSION != "v2" ]; then
-    # Kubernetes 1.10.x introduced cgroup changes that caused the container's
-    # hugepage byte limit quota to zero out. This workaround sets that pod limit
-    # back to the total number of hugepage bytes available to the baremetal host.
-    if [ -d /sys/fs/cgroup/hugetlb ]; then
-      limits="$(ls /sys/fs/cgroup/hugetlb/{{ .Values.conf.kubernetes.cgroup }}/hugetlb.*.limit_in_bytes)" || \
-        (echo "ERROR: Failed to locate any hugetable limits. Did you set the correct cgroup in your values used for this chart?"
-         exit 1)
-      for limit in $limits; do
-        target="/sys/fs/cgroup/hugetlb/$(dirname $(awk -F: '($2~/hugetlb/){print $3}' /proc/self/cgroup))/$(basename $limit)"
-        # Ensure the write target for the hugepage limit for the pod exists
-        if [ ! -f "$target" ]; then
-          echo "ERROR: Could not find write target for hugepage limit: $target"
-        fi
-
-        # Write hugetable limit for pod
-        echo "$(cat $limit)" > "$target"
-      done
-    fi
-
-    # Determine OS default hugepage size to use for the hugepage write test
-    default_hp_kb="$(cat /proc/meminfo | grep Hugepagesize | tr -cd '[:digit:]')"
-
-    # Attempt to write to the hugepage mount to ensure it is operational, but only
-    # if we have at least 1 free page.
-    num_free_pages="$(cat /sys/kernel/mm/hugepages/hugepages-${default_hp_kb}kB/free_hugepages | tr -cd '[:digit:]')"
-    echo "INFO: '$num_free_pages' free hugepages of size ${default_hp_kb}kB"
-    if [ 0"$num_free_pages" -gt 0 ]; then
-      (fallocate -o0 -l "$default_hp_kb" /dev/hugepages/foo && rm /dev/hugepages/foo) || \
-        (echo "ERROR: fallocate failed test at /dev/hugepages with size ${default_hp_kb}kB"
-         rm /dev/hugepages/foo
-         exit 1)
-    fi
-  fi
 fi
 
 if [ -n "${LIBVIRT_CEPH_CINDER_SECRET_UUID}" ] || [ -n "${LIBVIRT_EXTERNAL_CEPH_CINDER_SECRET_UUID}" ] ; then

releasenotes/notes/libvirt.yaml

@@ -34,4 +34,5 @@ libvirt:
   - 0.1.31 Use quay.io/airshipit/kubernetes-entrypoint:latest-ubuntu_focal by default
   - 0.1.32 Enable a flag to parse Libvirt Nova metadata in libvirt exporter
   - 0.1.33 Handle cgroupv2 correctly
+  - 0.1.34 Remove hugepages creation test
 ...