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server: trim autoscale Windows VM hostname #11327

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server: trim autoscale Windows VM hostname #11327

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36e636a
server: trim autoscale Windows VM hostname
shwstppr Jul 29, 2025
0c34a76
fix
shwstppr Jul 30, 2025
aa21706
fix imports
shwstppr Jul 30, 2025
b97ef66
Merge remote-tracking branch 'apache/main' into fix-autoscalewinvm
shwstppr Aug 1, 2025
4c9de62
Merge branch 'main' into fix-autoscalewinvm
shwstppr Aug 8, 2025
4c9ff4c
improve
shwstppr Aug 25, 2025
16240b9
return if okay
shwstppr Aug 26, 2025
1857433
address comment
shwstppr Sep 9, 2025
087f2ab
fix
shwstppr Sep 30, 2025
fa30c81
missing test change
shwstppr Sep 30, 2025
1efc967
Merge remote-tracking branch 'apache/main' into fix-autoscalewinvm
shwstppr Oct 1, 2025
313e4d4
avoid chances of npe if both guestos name and displayname are null
shwstppr Oct 1, 2025
d24ffc3
change
shwstppr Oct 8, 2025
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17 changes: 12 additions & 5 deletions server/src/main/java/com/cloud/network/as/AutoScaleManagerImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1968,12 +1968,19 @@ protected Pair<String, String> getNextVmHostAndDisplayName(AutoScaleVmGroupVO as
RandomStringUtils.random(VM_HOSTNAME_RANDOM_SUFFIX_LENGTH, 0, 0, true, false, (char[])null, new SecureRandom()).toLowerCase();
// Truncate vm group name because max length of vm name is 63
int subStringLength = Math.min(asGroup.getName().length(), 63 - VM_HOSTNAME_PREFIX.length() - vmHostNameSuffix.length());
String displayName = VM_HOSTNAME_PREFIX + asGroup.getName().substring(0, subStringLength) + vmHostNameSuffix;
String hostName = displayName;
if (isWindows) {
hostName = displayName.substring(Math.max(0, displayName.length() - 15));
String name = VM_HOSTNAME_PREFIX + asGroup.getName().substring(0, subStringLength) + vmHostNameSuffix;
if (!isWindows) {
return new Pair<>(name, name);
}
return new Pair<>(hostName, displayName);
String hostName = name.substring(Math.max(0, name.length() - 15));
if (Character.isLetterOrDigit(hostName.charAt(0))) {
return new Pair<>(hostName, name);
}
String temp = name.substring(0, Math.max(0, name.length() - 15)).replaceAll("[^a-zA-Z0-9]", "");
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@DaanHoogland DaanHoogland Aug 25, 2025

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edge case: all of the last 15 chars are special chars or whitespace. I think we better do a replace first and then take the last 15.

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@shwstppr shwstppr Aug 26, 2025

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@DaanHoogland I don't think this case can happen.
The only user-defined part in the VM name is the name of the autoscale group, and we've checks for that to only contain letters, numbers and hyphen. checkAutoScaleVmGroupName` does that

if (!temp.isEmpty()) {
return new Pair<>(temp.charAt(temp.length() - 1) + hostName.substring(1), name);
}
return new Pair<>('a' + hostName.substring(1), name);
}

@Override
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