負荷試験で使う感じのuserdata

userdata

#!/bin/bash

sudo yum update
sudo yum install unbound jq -y
sudo systemctl enable unbound.service
sudo sed -i 's/PEERDNS=yes/PEERDNS=no/g' /etc/sysconfig/network-scripts/ifcfg-eth0
sudo sed -i 's/nameserver .*/nameserver 127.0.0.1/g' /etc/resolv.conf
sudo systemctl start unbound.service

cat <<EOF | sudo tee -a /etc/security/limits.conf
*       soft    nofile  65535
*       hard    nofile  65535
EOF

cat <<EOF | sudo tee -a /etc/sysctl.d/my_sysctl.conf
net.core.netdev_max_backlog = 300000
net.core.rmem_default = 8388608
net.core.rmem_max = 134217728
net.core.somaxconn = 32768
net.core.somaxconn = 40000
net.core.wmem_default = 8388608
net.core.wmem_max = 134217728
net.ipv4.ip_local_port_range = 1025 65535
net.ipv4.tcp_fin_timeout = 15
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_max_syn_backlog = 40000
net.ipv4.tcp_max_tw_buckets = 2000000
net.ipv4.tcp_mem  = 134217728 134217728 134217728
net.ipv4.tcp_moderate_rcvbuf = 1
net.ipv4.tcp_rmem = 4096 277750 134217728
net.ipv4.tcp_sack = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_wmem = 4096 277750 134217728
EOF

sysctl -p /etc/sysctl.d/my_sysctl.conf