Cloudstack doesn't validate the nfs secondary storage mount point

### problem

Cloudstack doesn't validate the secondary storage

### versions

ACS 4.22

### The steps to reproduce the bug

1. Have a cloudstack environment

2. Add a secondary storage

Provide an incorrect nfs mount point

3. Cloudstack adds secondary storage successfully even though there is an exception in logs

```

2026-02-20 11:28:49,044 DEBUG [c.c.u.SystemVmTemplateRegistration] (qtp1390913202-17:[ctx-c6004122, ctx-953c673e]) (logid:fd82bd2b) Successfully executed process [29541] for command [/usr/share/cloudstack-common/scripts/storage/secondary/setup-sysvm-tmplt -u 379d95ca-ae32-448b-821e-1f69ac0c0ae9 -f /usr/share/cloudstack-management/templates/systemvm/systemvmtemplate-4.22.0-x86_64-kvm.qcow2.bz2 -h kvm -d /tmp/tmp15364234521465452733/template/tmpl/1/3 ].
2026-02-20 11:28:49,044 DEBUG [c.c.u.SystemVmTemplateRegistration] (qtp1390913202-17:[ctx-c6004122, ctx-953c673e]) (logid:fd82bd2b) + [[ ! -u 379d95ca-ae32-448b-821e-1f69ac0c0ae9 -f /usr/share/cloudstack-management/templates/systemvm/systemvmtemplate-4.22.0-x86_64-kvm.qcow2.bz2 -h kvm -d /tmp/tmp15364234521465452733/template/tmpl/1/3 =~ ^-.+ ]]
+ OPTERR=0
+ DISKSPACE=2120000
+ getopts h:f:d:u::# OPTION
+ case $OPTION in
+ uflag=1
+ uuid=379d95ca-ae32-448b-821e-1f69ac0c0ae9
+ getopts h:f:d:u::# OPTION
+ case $OPTION in
+ fflag=1
+ tmpltimg=/usr/share/cloudstack-management/templates/systemvm/systemvmtemplate-4.22.0-x86_64-kvm.qcow2.bz2
+ getopts h:f:d:u::# OPTION
+ case $OPTION in
+ hyper=kvm
+ getopts h:f:d:u::# OPTION
+ case $OPTION in
+ destdir=/tmp/tmp15364234521465452733/template/tmpl/1/3
+ getopts h:f:d:u::# OPTION
+ [[ kvm == \k\v\m ]]
+ ext=qcow2
++ which qemu-img
+ qemuimgcmd=/usr/bin/qemu-img
+ localfile=379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2
+ sudo mkdir -p /tmp/tmp15364234521465452733/template/tmpl/1/3
+ [[ 0 -ne 0 ]]
+ [[ -f /tmp/tmp15364234521465452733/template/tmpl/1/3/template.properties ]]
++ sudo find /tmp/tmp15364234521465452733/template/tmpl/1/3 -name '*.qcow2'
+ destfiles=

+ sudo cp /usr/share/cloudstack-management/templates/systemvm/systemvmtemplate-4.22.0-x86_64-kvm.qcow2.bz2 /tmp/cloud/templates//379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2
+ [[ 0 -ne 0 ]]
+++ dirname /usr/share/cloudstack-common/scripts/storage/secondary/setup-sysvm-tmplt
++ /usr/share/cloudstack-common/scripts/storage/secondary/createtmplt.sh -s 2 -d 'SystemVM Template ( kvm )' -n 379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2 -t /tmp/tmp15364234521465452733/template/tmpl/1/3/ -f /tmp/cloud/templates//379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2 -u -v -c
Uncompressing to /tmp/cloud/templates//379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2.tmp (type bz2)...could take a long time
Copying to /tmp/tmp15364234521465452733/template/tmpl/1/3//379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2...could take a while
+ installrslt=
+ [[ 0 -ne 0 ]]
+ tmpdestdir=/tmp/cloud/templates/
+ '[' qcow2 == ova ']'
+ rm -rf /tmp/cloud/templates//379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2.tmp
+ tmpltfile=/tmp/tmp15364234521465452733/template/tmpl/1/3/379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2
++ awk '-F ' '{print $5}'
++ sudo ls -l /tmp/tmp15364234521465452733/template/tmpl/1/3/379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2
+ tmpltsize=522649088
+ [[ qcow2 == \q\c\o\w\2 ]]
++ xargs
++ grep -i 'virtual size'
++ sudo /usr/bin/qemu-img info /tmp/tmp15364234521465452733/template/tmpl/1/3/379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2
++ sed -ne 's/.*(\([0-9]*\).*/\1/p'
+ vrtmpltsize=5242880000
+ templateId=3
+ sudo touch /tmp/tmp15364234521465452733/template/tmpl/1/3/template.properties
+ echo qcow2=true
+ echo id=3
+ echo public=true
+ echo qcow2.filename=379d95ca-ae32-448b-821e-1f69ac0c0ae9.qcow2
+ echo uniquename=routing-3
+ echo qcow2.virtualsize=5242880000
+ echo virtualsize=5242880000
+ echo qcow2.size=522649088
+ sudo cp /tmp/cloud/templates//template.properties /tmp/tmp15364234521465452733/template/tmpl/1/3/template.properties
+ '[' -f /tmp/cloud/templates//template.properties ']'

Successfully installed system VM template /usr/share/cloudstack-management/templates/systemvm/systemvmtemplate-4.22.0-x86_64-kvm.qcow2.bz2 and template.properties to /tmp/tmp15364234521465452733/template/tmpl/1/3
+ exit 0

2026-02-20 11:28:49,067 DEBUG [c.c.u.s.Script] (qtp1390913202-17:[ctx-c6004122, ctx-953c673e]) (logid:fd82bd2b) Executing command [/bin/bash -c sudo umount /tmp/tmp15364234521465452733 ].
2026-02-20 11:28:49,097 WARN [c.c.u.s.Script] (qtp1390913202-17:[ctx-c6004122, ctx-953c673e]) (logid:fd82bd2b) Execution of process [29663] for command [/bin/bash -c sudo umount /tmp/tmp15364234521465452733 ] failed.
2026-02-20 11:28:49,097 DEBUG [c.c.u.s.Script] (qtp1390913202-17:[ctx-c6004122, ctx-953c673e]) (logid:fd82bd2b) Exit value of process [29663] for command [/bin/bash -c sudo umount /tmp/tmp15364234521465452733 ] is [32].
2026-02-20 11:28:49,097 WARN [c.c.u.s.Script] (qtp1390913202-17:[ctx-c6004122, ctx-953c673e]) (logid:fd82bd2b) Process [29663] for command [/bin/bash -c sudo umount /tmp/tmp15364234521465452733 ] encountered the error: [umount: /tmp/tmp15364234521465452733: not mounted.].
2026-02-20 11:28:49,098 ERROR [c.c.u.SystemVmTemplateRegistration] (qtp1390913202-17:[ctx-c6004122, ctx-953c673e]) (logid:fd82bd2b) Failed to cleanup mounted store at: /tmp/tmp15364234521465452733 java.nio.file.DirectoryNotEmptyException: /tmp/tmp15364234521465452733
at java.base/sun.nio.fs.UnixFileSystemProvider.implDelete(UnixFileSystemProvider.java:246)
at java.base/sun.nio.fs.AbstractFileSystemProvider.deleteIfExists(AbstractFileSystemProvider.java:110)
at java.base/java.nio.file.Files.deleteIfExists(Files.java:1191)
at com.cloud.upgrade.SystemVmTemplateRegistration.unmountStore(SystemVmTemplateRegistration.java:671)
at com.cloud.storage.StorageManagerImpl$4.doInTransactionWithoutResult(StorageManagerImpl.java:4070)
at com.cloud.utils.db.TransactionCallbackNoReturn.doInTransaction(TransactionCallbackNoReturn.java:25)
at com.cloud.utils.db.Transaction$2.doInTransaction(Transaction.java:48)
at com.cloud.utils.db.Transaction.execute(Transaction.java:38)

...

### What to do about it?

Cloudstack should throw an exception saying the nfs mount is an invalid

Cloudstack is doing the validation only when adding primary storage

Beginne mit dem Ablauf zum Hinzufügen von Sekundärspeicher und dem in SystemVmTemplateRegistration.java und StorageManagerImpl.java gezeigten Bereinigungspfad. Reproduziere das Problem mit einem ungültigen NFS-Einhängepunkt und verfolge dann, warum der Fehler beim Einhängen den Speicher nicht ablehnt. Als erledigt gilt die Aufgabe, wenn die Hinzufügeoperation eine invalid-mount exception auslöst und eine Regressionstestabdeckung für den Fehler vorhanden ist.

Vom Indexierungsmodell aus dem Issue-Text verfasst.