github.com/openebs/api@v1.12.0/pkg/util/iscsi.go (about)

     1  // Copyright © 2020 The OpenEBS Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // CheckForIscsi is blocking call for checking status of istgt in cstor-istgt container.
    16  package util
    17  
    18  import (
    19  	"time"
    20  
    21  	"k8s.io/klog"
    22  )
    23  
    24  const (
    25  	IstgtConfPath        = "/usr/local/etc/istgt/istgt.conf"
    26  	IstgtStatusCmd       = "STATUS"
    27  	IstgtRefreshCmd      = "REFRESH"
    28  	IstgtReplicaCmd      = "REPLICA"
    29  	IstgtExecuteQuietCmd = "-q"
    30  	ReplicaStatus        = "Replica status"
    31  	WaitTimeForIscsi     = 3 * time.Second
    32  	// IstgtResizeCmd holds the command to trigger resize
    33  	IstgtResizeCmd = "RESIZE"
    34  	IstgtDRFCmd    = "DRF"
    35  )
    36  
    37  func CheckForIscsi(UnixSockVar UnixSock) {
    38  	for {
    39  		_, err := UnixSockVar.SendCommand(IstgtStatusCmd)
    40  		if err != nil {
    41  			time.Sleep(WaitTimeForIscsi)
    42  			klog.Warningf("Waiting for istgt... err : %v", err)
    43  			continue
    44  		}
    45  		break
    46  	}
    47  }