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ControlNetworkGuru does not take into account custom CIDR when assigning System VM link local IP address #6715
Description
ISSUE TYPE
- Bug Report
COMPONENT NAME
Management, Network, SystemVM
CLOUDSTACK VERSION
4.16.1
CONFIGURATION
In database:
MariaDB [cloud]> select name,value from configuration where name = 'control.cidr';
+--------------+------------------+
| name | value |
+--------------+------------------+
| control.cidr | 169.254.240.0/20 |
+--------------+------------------+
MariaDB [cloud]> select name,value from configuration where name = 'control.gateway';
+-----------------+---------------+
| name | value |
+-----------------+---------------+
| control.gateway | 169.254.240.1 |
+-----------------+---------------+
MariaDB [cloud]> select count(*) from op_dc_link_local_ip_address_alloc;
+----------+
| count(*) |
+----------+
| 65533 |
+----------+
On agent:
root@hv-04-02-21:~# grep control.cidr /etc/cloudstack/agent/agent.properties
control.cidr=169.254.240.0/20
SUMMARY
When having set a control.cidr different from the norm (168.254.0.0/16) and the database table op_dc_link_local_ip_address_alloc is already populated with all the addresses in the default CIDR, then allocating an IP to a System VM does not take into account the requested CIDR, thus allocating an IP address in the wrong range.
https://github.com/apache/cloudstack/blob/main/engine/schema/src/main/java/com/cloud/dc/dao/DataCenterLinkLocalIpAddressDaoImpl.java#L52 should take this into account. This function is called in https://github.com/apache/cloudstack/blob/main/server/src/main/java/com/cloud/network/guru/ControlNetworkGuru.java#L134
STEPS TO REPRODUCE
- Install new management server
- After kickstart, disable the zone to prevent any system vm deploys
- In mysql database:
select count(*) from op_dc_link_local_ip_address_alloc;, it would return65533 - Connect agents
- Configure
control.cidron the manager and agents, andcontrol.gatewayon the manager, ie:
control.cidr=169.254.240.0/20
control.gateway=169.254.240.1
- Enable the zone, check the system vm link local address
EXPECTED RESULTS
- The System VMs should receive an IP address in the configured CIDR.
- Additional expected: In mysql database:
select count(*) from op_dc_link_local_ip_address_alloc;, it should return4093
ACTUAL RESULTS
- System VMs receive an IP address in the default
169.254.0.0/16range
2022-09-07 22:45:35,338 DEBUG [o.a.c.e.o.NetworkOrchestrator] (Work-Job-Executor-3:ctx-b1c76634 job-149/job-150 ctx-224681ec) (logid:32608415) Network id=201 is already implemented
2022-09-07 22:45:35,524 DEBUG [c.c.n.g.ControlNetworkGuru] (Work-Job-Executor-3:ctx-b1c76634 job-149/job-150 ctx-224681ec) (logid:32608415) Reserved NIC for v-18-VM [ipv4:169.254.167.69 netmask:255.255.240.0 gateway:169.254.240.1]
Activity
weizhouapache commentedon Jun 29, 2023
this seems to be related to #7580
github-actions commentedon May 23, 2026
This issue is stale because it has been open for 120 days with no activity. It may be removed by administrators of this project at any time. Remove the stale label or comment to request for removal of it to prevent this.