2 description "Base role applied to all servers"
7 :grant => { :status => :administrator },
8 :tomh => { :status => :administrator },
9 :matt => { :status => :administrator },
10 :jburgess => { :status => :administrator }
16 :systime => { :warning => "100", :critical => "250" }
22 :internal => { :metric => 200, :zone => "loc" },
23 :external => { :metric => 100, :zone => "osm" }
25 :search => ["openstreetmap.org"]
29 :exim_queue_limit => {
30 :help => "Mail queue alert level",
37 :comment => "Reboot automatically after a panic",
38 :parameters => { "kernel.panic" => "60" }
41 :comment => "Do TCP level MTU probing if we seem to have an ICMP blackhole",
43 "net.ipv4.tcp_mtu_probing" => "1",
44 "net.ipv4.tcp_base_mss" => "1024"
48 :comment => "Tune network buffers",
50 "net.core.rmem_max" => "16777216",
51 "net.core.wmem_max" => "16777216",
52 "net.ipv4.tcp_rmem" => "4096 87380 16777216",
53 "net.ipv4.tcp_wmem" => "4096 65536 16777216",
54 "net.ipv4.udp_mem" => "3145728 4194304 16777216"
58 :comment => "Increase maximum backlog for incoming network packets",
60 "net.core.netdev_max_backlog" => "2500",
61 "net.core.netdev_budget" => "600"
64 :network_conntrack_established => {
65 :comment => "Only track established connections for four hours",
67 "net.netfilter.nf_conntrack_tcp_timeout_established" => "14400"
71 :comment => "Turn on syncookies to protect against SYN floods",
73 "net.ipv4.tcp_syncookies" => "1"
77 :comment => "Use fq as the default queuing discipline and cubic for congestion control",
79 "net.core.default_qdisc" => "fq",
80 "net.ipv4.tcp_congestion_control" => "cubic"
83 :tune_cpu_scheduler => {
84 :comment => "Tune CPU scheduler for server scheduling",
86 "kernel.sched_migration_cost_ns" => 50000000,
87 "kernel.sched_autogroup_enabled" => 0
100 "recipe[munin::plugins]",
101 "recipe[networking]",