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Zabbix passive agent checks fail rand... | Closed |
Team A
[ZBX-25899] Monitoring issues with IPv6 when IPv4 is not available Created: 2025 Jan 17 Updated: 2025 Feb 17 Resolved: 2025 Feb 17 |
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| Status: | Closed |
| Project: | ZABBIX BUGS AND ISSUES |
| Component/s: | Proxy (P), Server (S) |
| Affects Version/s: | 7.0.8 |
| Fix Version/s: | 7.0.10rc1, 7.2.4rc1, 7.4.0alpha1 |
| Type: | Problem report | Priority: | Trivial |
| Reporter: | Danilo G. Baio | Assignee: | Vladislavs Sokurenko |
| Resolution: | Fixed | Votes: | 1 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | 16h | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Team: | Team A |
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| Sprint: | S25-W6/7 | ||||||||
| Story Points: | 1 | ||||||||
| Description |
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Hi, ** I have a mix of hosts/proxies with both IPv4 and IPv6, and some proxies running only on IPv6. After upgrading from 6.X to 7.0.8, I noticed that many Zabbix agent hosts were unavailable, including hosts that are monitored by proxies and the server, which has both IPv4 and IPv6. All hosts are configured with "DNS names". When I change them to "IP addresses" and insert their IPv6 addresses, they work again. Steps to reproduce:
Result: This is a log from an IPv6-only proxy that cannot connect to a host which has both IPv4 and IPv6: 75126:20250117:163846.857 In zbx_async_check_agent() key:'net.if.in[igb0]' host:'himawari.x.y.com' addr:'himawari.x.y.com' conn:'TLS with PSK' 75126:20250117:163846.857 In zbx_is_ip4() ip:'himawari.x.y.com' 75126:20250117:163846.857 End of zbx_is_ip4():FAIL 75126:20250117:163846.857 In zbx_is_ip6() ip:'himawari.x.y.com' 75126:20250117:163846.857 End of zbx_is_ip6():FAIL 75126:20250117:163846.857 In zbx_is_ip4() ip:'himawari.x.y.com' 75126:20250117:163846.857 End of zbx_is_ip4():FAIL 75126:20250117:163846.857 In zbx_is_ip6() ip:'himawari.x.y.com' 75126:20250117:163846.857 End of zbx_is_ip6():FAIL 75126:20250117:163846.857 End of zbx_async_check_agent():SUCCEED 75126:20250117:163846.858 In agent_task_process() step 'init' event:0 itemid:43726 addr:210.231.Y.Z 75126:20250117:163846.858 In zbx_is_ip4() ip:'210.231.Y.Z' 75126:20250117:163846.858 End of zbx_is_ip4():SUCCEED 75126:20250117:163846.858 In process_async_result() key:'system.users.num' host:'himawari.x.y.com' addr:'himawari.x.y.com' 75126:20250117:163846.858 finished processing itemid:43726 processing:2 75126:20250117:163846.858 End of process_async_result():NETWORK_ERROR 75126:20250117:163846.858 End of async_event():stop 75126:20250117:163846.858 End of async_dns_event() Zabbix agent item "net.if.out[igb0]" on host "himawari.x.y.com" failed: first network error, wait for 15 seconds ... temporarily disabling Zabbix agent checks on host "himawari.x.y.com": interface unavailable Expected: Zabbix agent working on IPv6 and DNS name. |
| Comments |
| Comment by Alexander Vladishev [ 2025 Feb 07 ] |
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A very similar issue is described in |
| Comment by Vladislavs Sokurenko [ 2025 Feb 10 ] |
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Implemented in pull request: |
| Comment by Vladislavs Sokurenko [ 2025 Feb 12 ] |
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Implemented in:
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| Comment by Andrii Fediuk [ 2025 Feb 13 ] |
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Updated documentation: |