Harmonise sysctl between host and guest

Author: zaymat

tools/osbuilder/rootfs-builder/datadog-files/etc/sysctl.d/99-datadog.conf

@@ -0,0 +1,40 @@
+fs.nr_open = 2097152
+fs.suid_dumpable = 0
+kernel.dmesg_restrict = 1
+kernel.hung_task_warnings = -1
+kernel.keys.maxkeys = 500
+kernel.perf_event_mlock_kb = 2064
+kernel.perf_event_paranoid = 2
+kernel.randomize_va_space = 2
+net.core.netdev_max_backlog = 40000
+net.core.rmem_max = 16777216
+net.core.somaxconn = 10240
+net.core.wmem_max = 16777216
+net.ipv4.conf.all.accept_redirects = 0
+net.ipv4.conf.all.accept_source_route = 0
+net.ipv4.conf.all.log_martians = 1
+net.ipv4.conf.all.route_localnet = 1
+net.ipv4.conf.all.rp_filter = 2
+net.ipv4.conf.all.secure_redirects = 0
+net.ipv4.conf.all.send_redirects = 0
+net.ipv4.conf.default.accept_redirects = 0
+net.ipv4.conf.default.accept_source_route = 0
+net.ipv4.conf.default.log_martians = 1
+net.ipv4.conf.default.rp_filter = 2
+net.ipv4.conf.default.secure_redirects = 0
+net.ipv4.conf.default.send_redirects = 0
+net.ipv4.icmp_echo_ignore_broadcasts = 1
+net.ipv4.icmp_ignore_bogus_error_responses = 1
+net.ipv4.ip_forward = 1
+net.ipv4.neigh.default.gc_thresh1 = 0
+net.ipv4.neigh.default.gc_thresh2 = 8192
+net.ipv4.neigh.default.gc_thresh3 = 16384
+net.ipv4.tcp_max_syn_backlog = 10240
+net.ipv4.tcp_max_tw_buckets = 2000000
+net.ipv4.tcp_retries2 = 7
+net.ipv4.tcp_rfc1337 = 1
+net.ipv4.tcp_rmem = 4096 65536 16777216
+net.ipv4.tcp_syn_retries = 2
+net.ipv4.tcp_syncookies = 1
+net.ipv4.tcp_wmem = 4096 65536 16777216
+vm.max_map_count = 2147483647