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

Bắt đầu với luồng thêm secondary storage và đường dẫn dọn dẹp được thể hiện trong SystemVmTemplateRegistration.java và StorageManagerImpl.java. Tái hiện vấn đề với một điểm mount NFS không hợp lệ, sau đó truy vết lý do lỗi mount không từ chối storage. Hoàn thành khi thao tác thêm ném ra một invalid-mount exception và có kiểm thử hồi quy bao phủ lỗi này.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.