Re: net-mgmt/net-snmp needs JAIL : off to get Memory usage

On Thu, Dec 28, 2023, at 1:24 PM, Dan Langille wrote:
> On Thu, Dec 28, 2023, at 11:28 AM, Dan Langille wrote:
>> Hello,
>>
>> I've just solved a long-puzzling issue with net-mgmt/net-snmp which was 
>> not reporting Memory Usage on my hosts.
>>
>> Tests show it is related to the JAIL build-time configuration option.
>>
>>   JAIL=off: Options for running snmpd within a jail(8)
>>
>> If off, the default, Memory Usage is available via snmpd.
>>
>> If on, it is not.
>>
>> One might ask: why have it on if not running in a jail?
>>
>> Simplicity: I build my own packages. I could have one repo specifically 
>> for hosts (i.e. non-jails), but until now, it's never been an issue.
>>
>> However, I want to point that that JAIL=off does not seem to affect 
>> usage within a jail.
>>
>> It becomes clear what JAIL does when looking at the Makefile:
>>
>> if ${PORT_OPTIONS:MJAIL}
>> NET_SNMP_WITHOUT_MIB_MODULE_LIST+=      host
>> NET_SNMP_WITHOUT_MIB_MODULE_LIST+=      ucd-snmp/memory
>> CONFIGURE_ARGS+=                        --without-kmem-usage
>> endif
>>
>> Not it's clear.  Don't report host-like objects when within a jail.
>>
>> It is time for some flavors on this port?  I know I'd like one for my 
>> use: one without the above and with.
>>
>> I'll see if I can mangle something up which works.
>
> This works for me.
>
> -- 
>   Dan Langille
>   dan@langille.org
> Attachments:
> * patch-net-snmp-jail-flavor


I forgot the mailing list strips attachments.  Here is that patch, pasted in:

[9:16 air01 dan ~/Downloads] % cat patch-net-snmp-jail-flavor
diff --git a/net-mgmt/net-snmp/Makefile b/net-mgmt/net-snmp/Makefile
index e5f60faefcbd..686c393991ea 100644
--- a/net-mgmt/net-snmp/Makefile
+++ b/net-mgmt/net-snmp/Makefile
@@ -18,6 +18,17 @@ LICENSE_FILE=	${WRKSRC}/COPYING
 NOT_FOR_ARCHS=		mips mips64
 NOT_FOR_ARCHS_REASON=	SSP is currently broken on MIPS
 
+FLAVORS=	default jail
+FLAVORS?=	${FLAVORS:[1]}
+
+.if ${FLAVOR:U} == jail
+NET_SNMP_WITHOUT_MIB_MODULE_LIST+=	host
+NET_SNMP_WITHOUT_MIB_MODULE_LIST+=	ucd-snmp/memory
+CONFIGURE_ARGS+=			--without-kmem-usage
+.endif
+
+jail_PKGNAMESUFFIX=	-jail
+
 OPTIONS_DEFINE=	IPV6 MFD_REWRITES PERL PERL_EMBEDDED PYTHON DUMMY TKMIB \
 		MYSQL AX_SOCKONLY UNPRIVILEGED SMUX DOCS JAIL AX_DISABLE_TRAP \
 		TLS NEWSYSLOG NOLIBPKG SCTP
[9:17 air01 dan ~/Downloads] % 

-- 
  Dan Langille
  dan@langille.org