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Fix scanning of failed targets

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If a iSCSI target is down while a volume is attached, reading from
/sys/class/iscsi_host/host415/device/session383/connection383:0/iscsi_connection/connection383:0/address
fails with an error. Kubelet should assume that such target is not
available / logged in and try to relogin. Eventually, if such error
persists, it should continue mounting the volume if the other
paths are healthy instead of failing whole WaitForAttach().
This commit is contained in:
Jan Safranek 2019-02-20 17:17:01 +01:00
parent 2f52e91d56
commit dc46f483b5
1 changed files with 14 additions and 7 deletions
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21
pkg/volume/util/device_util_linux.go
View File

@ -21,10 +21,11 @@ package util
import (
"errors"
"fmt"
"k8s.io/klog"
"path"
"strconv"
"strings"
"k8s.io/klog"
)
// FindMultipathDeviceForDevice given a device name like /dev/sdx, find the devicemapper parent
@ -135,7 +136,8 @@ func (handler *deviceHandler) GetISCSIPortalHostMapForTarget(targetIqn string) (
targetNamePath := sessionPath + "/iscsi_session/" + sessionName + "/targetname"
targetName, err := io.ReadFile(targetNamePath)
if err != nil {
return nil, err
klog.Infof("Failed to process session %s, assuming this session is unavailable: %s", sessionName, err)
continue
}
// Ignore hosts that don't matchthe target we were looking for.
@ -147,7 +149,8 @@ func (handler *deviceHandler) GetISCSIPortalHostMapForTarget(targetIqn string) (
// for the iSCSI connection.
dirs2, err := io.ReadDir(sessionPath)
if err != nil {
return nil, err
klog.Infof("Failed to process session %s, assuming this session is unavailable: %s", sessionName, err)
continue
}
for _, dir2 := range dirs2 {
// Skip over files that aren't the connection
@ -164,25 +167,29 @@ func (handler *deviceHandler) GetISCSIPortalHostMapForTarget(targetIqn string) (
addrPath := connectionPath + "/address"
addr, err := io.ReadFile(addrPath)
if err != nil {
return nil, err
klog.Infof("Failed to process connection %s, assuming this connection is unavailable: %s", dirName, err)
continue
}
portPath := connectionPath + "/port"
port, err := io.ReadFile(portPath)
if err != nil {
return nil, err
klog.Infof("Failed to process connection %s, assuming this connection is unavailable: %s", dirName, err)
continue
}
persistentAddrPath := connectionPath + "/persistent_address"
persistentAddr, err := io.ReadFile(persistentAddrPath)
if err != nil {
return nil, err
klog.Infof("Failed to process connection %s, assuming this connection is unavailable: %s", dirName, err)
continue
}
persistentPortPath := connectionPath + "/persistent_port"
persistentPort, err := io.ReadFile(persistentPortPath)
if err != nil {
return nil, err
klog.Infof("Failed to process connection %s, assuming this connection is unavailable: %s", dirName, err)
continue
}
// Add entries to the map for both the current and persistent portals