macros stopped to substitute in the agent (7)

[wojkuk]

Hello,

Some of the items on my hosts stopped working - the error "special characters .... are not allowed in the parameters" started appearing i zabbix_agent logs.
it's strange because it worked before and looking in the GUI I see that the macros still exist (or are inhrerited from the template).

Now I see errors in zabbix_agent.log looking like this:

active check "file.stat[{$SYSLOG_FILE},14]" is not supported: Special characters "\, ', ", `, *, ?, [, ], {, }, ~, $, !, &, ;, (, ), <, >, |, #, @, 0x0a" are not allowed in the parameters.

It looks like zabbix_agent is getting "raw" configuration without any macros substituted.

A week earlier we migrated the entire infrastructure to zabbix7 and proxygroups.
The problem appeared after several days - as if only after some discovery, or previous items expired, or some failover on proxygroups.

[wojkuk]

Additional findings:
After changing the proxy to generic, the macros are translated to strings like /var/log/syslog in the item parameters and everything goes back to normal.
But after returning to the proxygroup, the agent starts executing items with unresolved macros like {$SYSLOG_FILE} again.

I checked mysql databases of both proxies, and all entries (items, hosts, hostmacro, host_template) are identical.
It looks like "generic" zabbix_proxy resolves macros when sending config to agent, and proxygroup sends raw config, without lookup to hostmacros.

Both proxies are 7.0.3 Revision d93ce022627

[cyber]

You can submit a bug report at https://support.zabbix.com/projects/ZBX/issues/ to get it confirmed and fixed.

[wojkuk]

https://support.zabbix.com/browse/ZBX-25283