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rbd: fix rbd-nbd io-timeout to never abort

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With the tests at CI, it kind of looks like that the IO is timing out after
30 seconds (default with rbd-nbd). Since we have tweaked reattach-timeout
to 300 seconds at ceph-csi, we need to explicitly set io-timeout on the
device too, as it doesn't make any sense to keep
io-timeout < reattach-timeout

Hence we set io-timeout for rbd nbd to 0. Specifying io-timeout 0 tells
the nbd driver to not abort the request and instead see if it can be
restarted on another socket.

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Suggested-by: Ilya Dryomov <idryomov@redhat.com>
This commit is contained in:
Prasanna Kumar Kalever 2021-08-19 11:55:21 +05:30 committed by mergify[bot]
parent 3bf17ade7a
commit 4f40213d8e
1 changed files with 11 additions and 0 deletions
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11
internal/rbd/rbd_attach.go
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@ -49,6 +49,7 @@ const (
rbdMapConnectionTimeout = "Connection timed out"
defaultNbdReAttachTimeout = 300 /* in seconds */
defaultNbdIOTimeout = 0 /* do not abort the requests */
// The default way of creating nbd devices via rbd-nbd is through the
// legacy ioctl interface, to take advantage of netlink features we
@ -59,6 +60,10 @@ const (
// It specifies how long the device should be held waiting for the
// userspace process to come back to life.
setNbdReattach = "reattach-timeout"
// `io-timeout` of rbd-nbd is to tweak NBD_ATTR_TIMEOUT. It specifies
// how long the IO should wait to get handled before bailing out.
setNbdIOTimeout = "io-timeout"
)
var hasNBD = false
@ -256,6 +261,9 @@ func appendDeviceTypeAndOptions(cmdArgs []string, isNbd, isThick bool, userOptio
if !strings.Contains(userOptions, setNbdReattach) {
cmdArgs = append(cmdArgs, "--options", fmt.Sprintf("%s=%d", setNbdReattach, defaultNbdReAttachTimeout))
}
if !strings.Contains(userOptions, setNbdIOTimeout) {
cmdArgs = append(cmdArgs, "--options", fmt.Sprintf("%s=%d", setNbdIOTimeout, defaultNbdIOTimeout))
}
}
if isThick {
// When an image is thick-provisioned, any discard/unmap/trim
@ -280,6 +288,9 @@ func appendRbdNbdCliOptions(cmdArgs []string, userOptions string) []string {
if !strings.Contains(userOptions, setNbdReattach) {
cmdArgs = append(cmdArgs, fmt.Sprintf("--%s=%d", setNbdReattach, defaultNbdReAttachTimeout))
}
if !strings.Contains(userOptions, setNbdIOTimeout) {
cmdArgs = append(cmdArgs, fmt.Sprintf("--%s=%d", setNbdIOTimeout, defaultNbdIOTimeout))
}
if userOptions != "" {
options := strings.Split(userOptions, ",")
for _, opt := range options {