Hey All, Been working on rolling out HTCP cache_peer relationships within my squid cluster, but I'm running into a 'small' issue. After starting squid with the cache_peers configured to use htcp, squid sends quite a few UDP packets to the siblings on the htcp port, however, it then marks them as dead. Ideas/help would be appreciated! Below are tcpdumps, and the config I'm utilizing. Cache8 tcpdump from squid startup on cache1 to cache8 being marked as dead: 00:52:41.512445 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 921 00:52:41.807481 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 789 00:52:41.807995 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 346 00:52:41.808106 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 354 00:52:41.808227 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 362 00:52:41.968961 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 322 00:52:42.023668 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 789 00:52:42.173640 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 299 00:52:42.277635 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 789 00:52:42.641855 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 485 00:52:42.790272 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 366 00:52:42.795551 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 350 00:52:42.898732 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 292 00:52:43.293162 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 296 00:52:43.627891 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 284 00:52:44.394020 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 366 00:52:44.675878 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 321 00:52:45.241068 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 940 00:52:47.834801 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 349 00:52:48.947938 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 302 00:52:49.048647 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 321 00:52:49.120675 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 567 00:52:49.324587 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 363 00:52:50.250438 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 370 00:52:51.396922 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 318 00:52:51.512461 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 935 00:52:51.927925 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 349 00:53:02.172733 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 771 Cache1 tcpdump from squid startup on cache1 to cache8 being marked as dead: 00:52:41.506998 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 921 00:52:41.802035 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 789 00:52:41.802574 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 346 00:52:41.802686 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 354 00:52:41.802807 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 362 00:52:41.963543 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 322 00:52:42.018232 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 789 00:52:42.168224 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 299 00:52:42.272199 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 789 00:52:42.636431 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 485 00:52:42.784852 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 366 00:52:42.790131 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 350 00:52:42.893315 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 292 00:52:43.287743 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 296 00:52:43.622474 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 284 00:52:44.388599 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 366 00:52:44.670459 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 321 00:52:45.235623 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 940 00:52:47.829382 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 349 00:52:48.942519 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 302 00:52:49.043228 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 321 00:52:49.115246 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 567 00:52:49.319166 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 363 00:52:50.245010 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 370 00:52:51.391500 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 318 00:52:51.507016 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 935 00:52:51.922504 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 349 00:53:02.167290 IP cache1.int.last.fm.4827 > cache8.int.last.fm.4827: UDP, length 771 Cache1 cache.log from restart to cache8 being marked dead: 2007/10/12 00:52:41| Reconfiguring Squid Cache (version 2.6.STABLE14)... 2007/10/12 00:52:41| FD 339 Closing HTTP connection 2007/10/12 00:52:41| Closing Pinger socket on FD 344 2007/10/12 00:52:41| FD 340 Closing ICP connection 2007/10/12 00:52:41| FD 341 Closing HTCP socket 2007/10/12 00:52:41| FD 343 Closing SNMP socket 2007/10/12 00:52:41| Cache dir '/var/spool/squid-int' size remains unchanged at 104857600 KB 2007/10/12 00:52:41| User-Agent logging is disabled. 2007/10/12 00:52:41| DNS Socket created at 0.0.0.0, port 32825, FD 219 2007/10/12 00:52:41| Adding nameserver 10.0.6.12 from squid.conf 2007/10/12 00:52:41| Adding nameserver 10.0.0.12 from squid.conf 2007/10/12 00:52:41| Accepting accelerated HTTP connections at 0.0.0.0, port 8081, FD 225. 2007/10/12 00:52:41| Accepting ICP messages at 0.0.0.0, port 3131, FD 228. 2007/10/12 00:52:41| Accepting HTCP messages on port 4827, FD 233. 2007/10/12 00:52:41| Accepting SNMP messages on port 3402, FD 244. 2007/10/12 00:52:41| WCCP Disabled. 2007/10/12 00:52:41| Pinger socket opened on FD 288 2007/10/12 00:52:41| Configuring Parent 10.0.0.15/80/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.1/81/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.1/82/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.1/83/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.1/84/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.2/81/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.2/82/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.2/83/0 2007/10/12 00:52:41| Configuring Parent 10.0.20.2/84/0 2007/10/12 00:52:41| Configuring Parent 10.0.0.35/80/0 2007/10/12 00:52:41| Configuring Parent 10.0.0.35/81/0 2007/10/12 00:52:41| Configuring Parent 10.0.0.114/80/0 2007/10/12 00:52:41| Configuring Parent 10.0.0.114/81/0 2007/10/12 00:52:41| Configuring Parent 10.0.0.114/82/0 2007/10/12 00:52:41| Configuring Parent 10.0.0.114/83/0 2007/10/12 00:52:41| Configuring Sibling 10.0.12.8/8081/4827 2007/10/12 00:52:41| Loaded Icons. 2007/10/12 00:52:41| Ready to serve requests. 2007/10/12 00:53:02| Detected DEAD Sibling: 10.0.12.8 Global squid configuration (on deployment, things that aren't valid for a particular box - i.e. having itself in the squid.conf as a cache_peer - are removed): http_port 8081 accel vhost hosts_file /etc/hosts dns_nameservers 10.0.6.12 10.0.0.12 #mime_table /etc/squid-int/mime.conf cache_effective_user proxy cache_replacement_policy heap GDSF cache_swap_low 90 cache_swap_high 95 coredump_dir /var/spool/squid-int cache_dir aufs /var/spool/squid-int 102400 16 256 cache_mem 200 MB maximum_object_size_in_memory 50 KB access_log /var/log/squid-int/access.log cache_log /var/log/squid-int/cache.log cache_store_log /var/log/squid-int/store.log #visible_hostname cache2.int.last.fm pid_filename /var/run/squid-int.pid logfile_rotate 10 memory_pools off maximum_object_size 50 MB quick_abort_min 0 KB quick_abort_max 0 KB log_icp_queries off client_db off half_closed_clients off query_icmp on pinger_program /usr/bin/pinger netdb_ping_period 120 second test_reachability on digest_generation on digest_bits_per_entry 4 digest_rebuild_period 2 hours digest_rewrite_period 2 hours digest_swapout_chunk_size 16 KB digest_rebuild_chunk_percentage 5 prefer_direct off acl all src 0.0.0.0/0.0.0.0 acl squiddies src 10.0.0.0/255.0.0.0 acl static dstdomain static.last.fm acl userserve dstdomain userserve.last.fm acl ws dstdomain ws.audioscrobbler.com acl mainsite dstdom_regex www.last.*fm.* cn.last.fm lastfm.spiegel.de ws.audioscrobbler.com ext.last.fm http_access allow static http_access allow ws http_access allow userserve http_access allow mainsite http_access allow squiddies http_access deny all miss_access allow all miss_access deny squiddies icp_access allow squiddies icp_port 3131 htcp_port 4827 ###Static cache_peer 10.0.0.15 parent 80 0 no-query originserver no-digest no-netdb-exchange name=static cache_peer_domain static static.last.fm ###Static ends ###Userserve cache_peer 10.0.20.1 parent 81 0 no-query originserver no-digest no-netdb-exchange name=userserve1-81 round-robin cache_peer_domain userserve1-81 userserve.last.fm cache_peer 10.0.20.1 parent 82 0 no-query originserver no-digest no-netdb-exchange name=userserve1-82 round-robin cache_peer_domain userserve1-82 userserve.last.fm cache_peer 10.0.20.1 parent 83 0 no-query originserver no-digest no-netdb-exchange name=userserve1-83 round-robin cache_peer_domain userserve1-83 userserve.last.fm cache_peer 10.0.20.1 parent 84 0 no-query originserver no-digest no-netdb-exchange name=userserve1-84 round-robin cache_peer_domain userserve1-84 userserve.last.fm cache_peer 10.0.20.2 parent 81 0 no-query originserver no-digest no-netdb-exchange name=userserve2-81 round-robin cache_peer_domain userserve2-81 userserve.last.fm cache_peer 10.0.20.2 parent 82 0 no-query originserver no-digest no-netdb-exchange name=userserve2-82 round-robin cache_peer_domain userserve2-82 userserve.last.fm cache_peer 10.0.20.2 parent 83 0 no-query originserver no-digest no-netdb-exchange name=userserve2-83 round-robin cache_peer_domain userserve2-83 userserve.last.fm cache_peer 10.0.20.2 parent 84 0 no-query originserver no-digest no-netdb-exchange name=userserve2-84 round-robin cache_peer_domain userserve2-84 userserve.last.fm ###Userserve Ends ###ws.audioscrobbler.com & mainsite cache_peer 10.0.0.35 parent 80 0 no-query originserver no-digest no-netdb-exchange name=perlbal1-80 round-robin cache_peer_access perlbal1-80 allow mainsite cache_peer 10.0.0.35 parent 81 0 no-query originserver no-digest no-netdb-exchange name=perlbal1-81 round-robin cache_peer_access perlbal1-81 allow mainsite cache_peer 10.0.0.114 parent 80 0 no-query originserver no-digest no-netdb-exchange name=perlbal2-80 round-robin cache_peer_access perlbal2-80 allow mainsite cache_peer 10.0.0.114 parent 81 0 no-query originserver no-digest no-netdb-exchange name=perlbal2-81 round-robin cache_peer_access perlbal2-81 allow mainsite cache_peer 10.0.0.114 parent 82 0 no-query originserver no-digest no-netdb-exchange name=perlbal2-82 round-robin cache_peer_access perlbal2-82 allow mainsite cache_peer 10.0.0.114 parent 83 0 no-query originserver no-digest no-netdb-exchange name=perlbal2-83 round-robin cache_peer_access perlbal2-83 allow mainsite ###ws.audioscrobbler.com & mainsite Ends snmp_port 3402 acl snmppublic snmp_community public snmp_access allow snmppublic snmp_incoming_address 0.0.0.0 snmp_outgoing_address 255.255.255.255 cache_peer 10.0.12.1 neighbour 8081 4827 round-robin htcp cache_peer 10.0.12.2 neighbour 8081 4827 round-robin htcp cache_peer 10.0.12.3 neighbour 8081 4827 round-robin htcp cache_peer 10.0.12.4 neighbour 8081 4827 round-robin htcp cache_peer 10.0.12.5 neighbour 8081 4827 round-robin htcp cache_peer 10.0.12.6 neighbour 8081 4827 round-robin htcp cache_peer 10.0.12.7 neighbour 8081 4827 round-robin htcp cache_peer 10.0.12.8 neighbour 8081 4827 round-robin htcp Thanks guys -- Tony Dodd, Systems Administrator Last.fm | http://www.last.fm Karen House 1-11 Baches Street London N1 6DL check out my music taste at: http://www.last.fm/user/hawkeviper
