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1031c31e6a
This PR provides a new primary storage volume type called "FiberChannel" that allows access to volumes connected to hosts over fiber channel connections. It requires Multipath to provide path discovery and failover. Second, the PR adds an AdaptivePrimaryDatastoreProvider that abstracts how volumes are managed/orchestrated from the connector to communicate with the primary storage provider, using a ProviderAdapter interface, allowing the code interacting with the primary storage provider API's to be simpler and have no direct dependencies on Cloudstack code. Lastly, the PR provides an implementation of the ProviderAdapter classes for the HP Enterprise Primera line of storage solutions and the Pure Flash Array line of storage solutions.
134 lines
4.9 KiB
Bash
134 lines
4.9 KiB
Bash
#!/usr/bin/env bash
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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#####################################################################################
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#
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# Given a lun # and a WWID for a volume provisioned externally, find the volume
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# through the SCSI bus and make sure its visable via multipath
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#
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#####################################################################################
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LUN=${1:?"LUN required"}
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WWID=${2:?"WWID required"}
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WWID=$(echo $WWID | tr '[:upper:]' '[:lower:]')
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systemctl is-active multipathd || systemctl restart multipathd || {
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echo "$(date): Multipathd is NOT running and cannot be started. This must be corrected before this host can access this storage volume."
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logger -t "CS_SCSI_VOL_FIND" "${WWID} cannot be mapped to this host because multipathd is not currently running and cannot be started"
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exit 1
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}
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echo "$(date): Looking for ${WWID} on lun ${LUN}"
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# get vendor OUI. we will only delete a device on the designated lun if it matches the
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# incoming WWN OUI value. This is because multiple storage arrays may be mapped to the
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# host on different fiber channel hosts with the same LUN
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INCOMING_OUI=$(echo ${WWID} | cut -c2-7)
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echo "$(date): Incoming OUI: ${INCOMING_OUI}"
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# first we need to check if any stray references are left from a previous use of this lun
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for fchost in $(ls /sys/class/fc_host | sed -e 's/host//g'); do
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lingering_devs=$(lsscsi -w "${fchost}:*:*:${LUN}" | grep /dev | awk '{if (NF > 6) { printf("%s:%s ", $NF, $(NF-1));} }' | sed -e 's/0x/3/g')
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if [ ! -z "${lingering_devs}" ]; then
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for dev in ${lingering_devs}; do
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LSSCSI_WWID=$(echo $dev | awk -F: '{print $2}' | sed -e 's/0x/3/g')
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FOUND_OUI=$(echo ${LSSCSI_WWID} | cut -c3-8)
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if [ "${INCOMING_OUI}" != "${FOUND_OUI}" ]; then
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continue;
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fi
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dev=$(echo $dev | awk -F: '{ print $1}')
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logger -t "CS_SCSI_VOL_FIND" "${WWID} processing identified a lingering device ${dev} from previous lun use, attempting to clean up"
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MP_WWID=$(multipath -l ${dev} | head -1 | awk '{print $1}')
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MP_WWID=${MP_WWID:1} # strip first character (3) off
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# don't do this if the WWID passed in matches the WWID from multipath
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if [ ! -z "${MP_WWID}" ] && [ "${MP_WWID}" != "${WWID}" ]; then
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# run full removal again so all devices and multimap are cleared
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$(dirname $0)/disconnectVolume.sh ${MP_WWID}
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# we don't have a multimap but we may still have some stranded devices to clean up
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elif [ "${LSSCSI_WWID}" != "${WWID}" ]; then
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echo "1" > /sys/block/$(echo ${dev} | awk -F'/' '{print $NF}')/device/delete
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fi
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done
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sleep 3
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fi
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done
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logger -t "CS_SCSI_VOL_FIND" "${WWID} awaiting disk path at /dev/mapper/3${WWID}"
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# wait for multipath to map the new lun to the WWID
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echo "$(date): Waiting for multipath entry to show up for the WWID"
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while true; do
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ls /dev/mapper/3${WWID} >/dev/null 2>&1
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if [ $? == 0 ]; then
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break
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fi
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logger -t "CS_SCSI_VOL_FIND" "${WWID} not available yet, triggering scan"
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# instruct bus to scan for new lun
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for fchost in $(ls /sys/class/fc_host); do
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echo " --> Scanning ${fchost}"
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echo "- - ${LUN}" > /sys/class/scsi_host/${fchost}/scan
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done
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multipath -v2 2>/dev/null
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ls /dev/mapper/3${WWID} >/dev/null 2>&1
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if [ $? == 0 ]; then
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break
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fi
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sleep 5
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done
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echo "$(date): Doing a recan to make sure we have proper current size locally"
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for device in $(multipath -ll 3${WWID} | egrep '^ ' | awk '{print $2}'); do
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echo "1" > /sys/bus/scsi/drivers/sd/${device}/rescan;
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done
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sleep 3
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multipathd reconfigure
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sleep 3
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# cleanup any old/faulty paths
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delete_needed=false
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multipath -l 3${WWID}
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for dev in $(multipath -l 3${WWID} 2>/dev/null| grep failed | awk '{print $3}' ); do
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logger -t "CS_SCSI_VOL_FIND" "${WWID} multipath contains faulty path ${dev}, removing"
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echo 1 > /sys/block/${dev}/device/delete;
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delete_needed=true
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done
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if [ "${delete_needed}" == "true" ]; then
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sleep 10
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multipath -v2 >/dev/null
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fi
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multipath -l 3${WWID}
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logger -t "CS_SCSI_VOL_FIND" "${WWID} successfully discovered and available"
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echo "$(date): Complete - found mapped LUN at /dev/mapper/3${WWID}"
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exit 0
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