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Increase device discovery timeout to 30seconds/equal to checker_timeout.

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At present, iscsi plugin wait for 10seconds for a path to appear for a multipath
device, but at certain scenarios this may not be sufficient for device mapper
to get the path. The default multipath configuration has a configuation
called 'checker_timeout' which specify the timeout to user for path checkers
that issue scsi commands with an explicit timeout, in seconds;
default taken from /sys/block/sd*/device/timeout which is 30s.
This patch lift the timeout value from 10s to 30s.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
This commit is contained in:
Humble Chirammal 2019-05-29 16:37:37 +05:30
parent 223809de3b
commit d4ea88f3ce
1 changed files with 8 additions and 5 deletions
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13
pkg/volume/iscsi/iscsi_util.go
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@ -52,6 +52,9 @@ const (
// How many seconds to wait for a multipath device if at least two paths are available.
multipathDeviceTimeout = 10
// How many seconds to wait for a device/path to appear before giving up.
deviceDiscoveryTimeout = 30
// 'iscsiadm' error code stating that a session is logged in
// See https://github.com/open-iscsi/open-iscsi/blob/7d121d12ad6ba7783308c25ffd338a9fa0cc402b/include/iscsi_err.h#L37-L38
iscsiadmErrorSessExists = 15
@ -417,10 +420,10 @@ func (util *ISCSIUtil) AttachDisk(b iscsiDiskMounter) (string, error) {
devicePath = strings.Join([]string{"/dev/disk/by-path/pci", "*", "ip", tp, "iscsi", b.Iqn, "lun", b.Lun}, "-")
}
if exist := waitForPathToExist(&devicePath, multipathDeviceTimeout, iscsiTransport); !exist {
klog.Errorf("Could not attach disk: Timeout after %ds", multipathDeviceTimeout)
if exist := waitForPathToExist(&devicePath, deviceDiscoveryTimeout, iscsiTransport); !exist {
klog.Errorf("Could not attach disk: Timeout after %ds", deviceDiscoveryTimeout)
// update last error
lastErr = fmt.Errorf("Could not attach disk: Timeout after %ds", multipathDeviceTimeout)
lastErr = fmt.Errorf("Could not attach disk: Timeout after %ds", deviceDiscoveryTimeout)
continue
} else {
devicePaths[tp] = devicePath
@ -456,8 +459,8 @@ func (util *ISCSIUtil) AttachDisk(b iscsiDiskMounter) (string, error) {
}
// Try to find a multipath device for the volume
if len(bkpPortal) > 1 {
// Multipath volume was requested. Wait up to 10 seconds for the multipath device to appear.
devicePath = waitForMultiPathToExist(devicePathList, 10, b.deviceUtil)
// Multipath volume was requested. Wait up to multipathDeviceTimeout seconds for the multipath device to appear.
devicePath = waitForMultiPathToExist(devicePathList, multipathDeviceTimeout, b.deviceUtil)
} else {
// For PVs with 1 portal, just try one time to find the multipath device. This
// avoids a long pause when the multipath device will never get created, and