github-actions[bot] commented on issue #12772:
URL: https://github.com/apache/cloudstack/issues/12772#issuecomment-5294166135
## ๐ฏ Triage report
`GuestNetworkGuru.allocate()` calls `allocateDirectIp()` (intended for
Shared networks) for Isolated networks configured with `SpecifyIpRanges=true`,
causing `InsufficientAddressCapacityException` when the zone's VLAN pools are
exhausted even though the isolated network's own CIDR still has capacity. Issue
includes detailed repro steps, stack trace, and a proposed code fix, though the
reporter admits the root cause analysis may be incomplete.
### ๐ Assessment
| Dimension | Value | Reasoning |
|---|---|---|
| **Type** | type:bug | VM deployment failure caused by incorrect IP
allocation path selection based on network type |
| **Component** | component:networking | Guest network IP allocation logic
(`GuestNetworkGuru`) |
| **Severity** | Severity:Major | Blocks VM deployment entirely in the
affected configuration once VLAN pools are exhausted |
| **Labels** | type:bug, component:networking, Severity:Major | |
| **Coding agent** | Needs more info | Reporter explicitly states
uncertainty about the root cause ("it's a little complicated"); a maintainer is
already assigned and discussing the correct fix, so validation/design input is
needed before implementation |
### ๐ Similar issues
No duplicate or closely related open issues found.
<details><summary>๐ก Notes and suggestions</summary>
- A maintainer (weizhouapache, assigned) already commented that the check
should likely be scoped to Shared networks only (`GuestType.Shared`),
consistent with the reporter's proposed fix โ worth confirming there isn't a
case where Isolated + `SpecifyIpRanges` legitimately needs `allocateDirectIp()`.
- Suggested test coverage: deploy VM in Isolated network with
`SpecifyIpRanges=true` after exhausting VLAN pool IPs, verify IP is now sourced
from the network's CIDR via `acquireGuestIpAddress()`.
</details>
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