2 description "Base role applied to all servers"
7 :grant => { :status => :administrator },
8 :tomh => { :status => :administrator },
9 :matt => { :status => :administrator },
10 :jburgess => { :status => :administrator }
15 :internal => { :metric => 200 },
16 :external => { :metric => 100 }
18 :search => ["openstreetmap.org"]
22 :exim_queue_limit => {
23 :help => "Mail queue alert level",
30 :comment => "Reboot automatically after a panic",
31 :parameters => { "kernel.panic" => "60" }
34 :comment => "Do TCP level MTU probing if we seem to have an ICMP blackhole",
36 "net.ipv4.tcp_mtu_probing" => "1",
37 "net.ipv4.tcp_base_mss" => "1024"
41 :comment => "Tune network buffers",
43 "net.core.rmem_max" => "16777216",
44 "net.core.wmem_max" => "16777216",
45 "net.ipv4.tcp_rmem" => "4096 87380 16777216",
46 "net.ipv4.tcp_wmem" => "4096 65536 16777216",
47 "net.ipv4.udp_mem" => "3145728 4194304 16777216"
51 :comment => "Increase maximum backlog for incoming network packets",
53 "net.core.netdev_max_backlog" => "2500",
54 "net.core.netdev_budget" => "600"
57 :network_conntrack_established => {
58 :comment => "Only track established connections for four hours",
60 "net.netfilter.nf_conntrack_tcp_timeout_established" => "14400"
64 :comment => "Turn on syncookies to protect against SYN floods",
66 "net.ipv4.tcp_syncookies" => "1"
70 :comment => "Use fq as the default queuing discipline",
72 "net.core.default_qdisc" => "fq"
75 :tune_cpu_scheduler => {
76 :comment => "Tune CPU scheduler for server scheduling",
78 "kernel.sched_autogroup_enabled" => 0