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 :comment => "Reboot automatically after a panic",
30 :parameters => { "kernel.panic" => "60" }
33 :comment => "Do TCP level MTU probing if we seem to have an ICMP blackhole",
35 "net.ipv4.tcp_mtu_probing" => "1",
36 "net.ipv4.tcp_base_mss" => "1024"
40 :comment => "Tune network buffers",
42 "net.core.rmem_max" => "16777216",
43 "net.core.wmem_max" => "16777216",
44 "net.ipv4.tcp_rmem" => "4096\t87380\t16777216",
45 "net.ipv4.tcp_wmem" => "4096\t65536\t16777216",
46 "net.ipv4.udp_mem" => "3145728\t4194304\t16777216"
50 :comment => "Increase maximum backlog for incoming network packets",
52 "net.core.netdev_max_backlog" => "2500",
53 "net.core.netdev_budget" => "600"
56 :network_conntrack_established => {
57 :comment => "Only track established connections for four hours",
59 "net.netfilter.nf_conntrack_tcp_timeout_established" => "14400"
63 :comment => "Turn on syncookies to protect against SYN floods",
65 "net.ipv4.tcp_syncookies" => "1"
69 :comment => "Use fq as the default queuing discipline and cubic for congestion control",
71 "net.core.default_qdisc" => "fq",
72 "net.ipv4.tcp_congestion_control" => "cubic"
75 :tune_cpu_scheduler => {
76 :comment => "Tune CPU scheduler for server scheduling",
78 "kernel.sched_migration_cost_ns" => 50000000,
79 "kernel.sched_autogroup_enabled" => 0
91 "recipe[munin::plugins]",