Mock and squid

[Michael Thomas]

Paul Howarth wrote:
> Anybody have squid working well with mock?
> 
> I followed the guide on the wiki (Extras/MockTricks) and have the
> following non-default config options:
> 
> cache_swap_low 95
> cache_swap_high 98
> maximum_object_size 150000 KB
> maximum_object_size_in_memory 8 MB
> cache_replacement_policy heap LFUDA
> memory_replacement_policy heap LFUDA
> cache_dir ufs /var/spool/squid 4400 16 256
> acl localnet src 192.168.2.0/24
> http_access allow localnet
> memory_pools_limit 64 MB
> 
> /var/spool/squid is a separate 5G partition but squid seems very
> reluctant to fill it. After several mock builds, it's using only a small
> percentage of the available space:
> 
> /dev/mapper/VgBuildSys-squid
>                        5160576    489928   4408504  11% /var/spool/squid
> 
> The store.log indicates that it's not saving much at all (most RPM
> packages are RELEASE-d, and only the repodata XML files appear to be
> being stored).
> 
> Any suggestions as to why this might be, and/or how to debug it?

Are you sure the RELEASE lines correspond to the actual rpm files and
not the rpm headers?  Check for a HTTP status code of 200 for the actual
rpm files, vs. a status code of 206 (partial content) for the rpm
headers.  The squid configuration on this page does not cache partial
downloads (will squid even do that?) and will RELEASE them immediately:

Partial download (rpm header) not stored:
1156979634.763 RELEASE -1 FFFFFFFF 831BB6E09AECB2516F9279A7271237F9  206
1156979626        -1        -1 application/x-rpm 26711/26711 GET
http://newmirror.linux.duke.edu/pub/fedora/linux/core/updates/5/i386/selinux-policy-targeted-2.3.7-2.fc5.noarch.rpm

Full rpm stored:
1156979716.933 SWAPOUT 00 00000076 E8B3B83D4E58A2EA421A5B88B72B8C8C  200
1156979642 1156785034        -1 application/x-rpm 532860/532860 GET
http://newmirror.linux.duke.edu/pub/fedora/linux/core/updates/5/i386/selinux-policy-targeted-2.3.7-2.fc5.noarch.rpm

You might be able to use squidclient to tell you directly if something
is in the cache, but I haven't found decent docuementation for this tool
yet.  Instead you can use it to download individual packages and look in
access.log for the TCP_HIT vs. TCP_MISS messages, where TCP_HIT
indicates that a cached object is returned and TCP_MISS indicates that
the object was not cached:

# squidclient -s -v -m GET
http://newmirror.linux.duke.edu/pub/fedora/linux/core/updates/5/i386/selinux-policy-targeted-2.3.7-2.fc5.noarch.rpm
# tail -1 access.log
# tail -1 access.log
1156980363.449      5 127.0.0.1 TCP_HIT/200 533210 GET
http://newmirror.linux.duke.edu/pub/fedora/linux/core/updates/5/i386/selinux-policy-targeted-2.3.7-2.fc5.noarch.rpm
- NONE/- application/x-rpm

--Wart

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