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multipath.go
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multipath.go
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// Copyright 2020 Red Hat, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package misc
import (
"strings"
"github.com/coreos/mantle/kola/cluster"
"github.com/coreos/mantle/kola/register"
"github.com/coreos/mantle/platform"
"github.com/coreos/mantle/platform/conf"
"github.com/coreos/mantle/system"
)
var (
mpath_on_boot_day1 = conf.Butane(`
variant: fcos
version: 1.4.0
kernel_arguments:
should_exist:
- rd.multipath=default
- root=/dev/disk/by-label/dm-mpath-root
- rw`)
mpath_on_var_lib_containers = conf.Butane(`
variant: fcos
version: 1.4.0
systemd:
units:
- name: mpath-configure.service
enabled: true
contents: |
[Unit]
Description=Configure Multipath
ConditionFirstBoot=true
ConditionPathExists=!/etc/multipath.conf
Before=multipathd.service
DefaultDependencies=no
[Service]
Type=oneshot
ExecStart=/usr/sbin/mpathconf --enable
[Install]
WantedBy=multi-user.target
- name: mpath-var-lib-containers.service
enabled: true
contents: |
[Unit]
Description=Set Up Multipath On /var/lib/containers
ConditionFirstBoot=true
Requires=dev-mapper-mpatha.device
After=dev-mapper-mpatha.device
# See https://github.com/coreos/coreos-assembler/pull/2457
# and https://github.com/openshift/os/issues/743
After=ostree-remount.service
Before=kubelet.service
DefaultDependencies=no
[Service]
Type=oneshot
ExecStart=/usr/sbin/mkfs.xfs -L containers -m reflink=1 /dev/mapper/mpatha
# This is usually created by tmpfiles.d, but we run earlier than that.
ExecStart=/usr/bin/mkdir -p /var/lib/containers
[Install]
WantedBy=multi-user.target
- name: var-lib-containers.mount
enabled: true
contents: |
[Unit]
Description=Mount /var/lib/containers
After=mpath-var-lib-containers.service
Before=kubelet.service
[Mount]
What=/dev/disk/by-label/dm-mpath-containers
Where=/var/lib/containers
Type=xfs
[Install]
WantedBy=multi-user.target`)
)
func init() {
register.RegisterTest(®ister.Test{
Name: "multipath.day1",
Run: runMultipathDay1,
ClusterSize: 1,
Platforms: []string{"qemu-unpriv"},
UserData: mpath_on_boot_day1,
MultiPathDisk: true,
})
register.RegisterTest(®ister.Test{
Name: "multipath.day2",
Run: runMultipathDay2,
ClusterSize: 1,
Platforms: []string{"qemu-unpriv"},
MultiPathDisk: true,
})
register.RegisterTest(®ister.Test{
Name: "multipath.partition",
Run: runMultipathPartition,
ClusterSize: 1,
Platforms: []string{"qemu-unpriv"},
UserData: mpath_on_var_lib_containers,
AdditionalDisks: []string{"1G:mpath"},
})
}
func verifyMultipathBoot(c cluster.TestCluster, m platform.Machine) {
for _, mnt := range []string{"/sysroot", "/boot"} {
verifyMultipath(c, m, mnt)
}
c.MustSSH(m, "test -f /etc/multipath.conf")
}
func verifyBootDropins(c cluster.TestCluster, m platform.Machine, checkBootuuid bool) {
// Check that we took ownership of the rootfs
c.RunCmdSync(m, "sudo test -f /boot/.root_uuid")
if checkBootuuid {
// Check for bootuuid dropins where available
switch system.RpmArch() {
case "s390x":
case "x86_64", "aarch64":
c.RunCmdSync(m, `
sudo mount -o ro /dev/disk/by-label/EFI-SYSTEM /boot/efi
sudo sh -c 'test -f /boot/efi/EFI/*/bootuuid.cfg'
sudo umount /boot/efi`)
fallthrough
case "ppc64le":
c.RunCmdSync(m, "sudo test -f /boot/grub2/bootuuid.cfg")
}
}
}
func verifyMultipath(c cluster.TestCluster, m platform.Machine, path string) {
srcdev := string(c.MustSSHf(m, "findmnt -nvr %s -o SOURCE", path))
if !strings.HasPrefix(srcdev, "/dev/mapper/mpath") {
c.Fatalf("mount %s has non-multipath source %s", path, srcdev)
}
}
func runMultipathDay1(c cluster.TestCluster) {
m := c.Machines()[0]
verifyMultipathBoot(c, m)
if err := m.Reboot(); err != nil {
c.Fatalf("Failed to reboot the machine: %v", err)
}
verifyMultipathBoot(c, m)
verifyBootDropins(c, m, true)
}
func runMultipathDay2(c cluster.TestCluster) {
m := c.Machines()[0]
c.RunCmdSync(m, "sudo rpm-ostree kargs --append rd.multipath=default --append root=/dev/disk/by-label/dm-mpath-root")
if err := m.Reboot(); err != nil {
c.Fatalf("Failed to reboot the machine: %v", err)
}
verifyMultipathBoot(c, m)
verifyBootDropins(c, m, false)
}
func runMultipathPartition(c cluster.TestCluster) {
m := c.Machines()[0]
verifyMultipath(c, m, "/var/lib/containers")
if err := m.Reboot(); err != nil {
c.Fatalf("Failed to reboot the machine: %v", err)
}
verifyMultipath(c, m, "/var/lib/containers")
}