#修改/etc/sysctl.conf 文件中的一些默认的配置
if [ grep -v "^\s*#" /etc/sysctl.conf|grep -c "net.ipv4.ip_forward\s\+=\+0" ];then
cat >>/etc/sysctl.conf << EOF
net.ipv4.ip_forward = 0
net.ipv4.tcp_max_tw_buckets = 5000
fs.file-max = 65535
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_syncookies = 1
vm.overcommit_memory = 1
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_abort_on_overflow = 0
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 65535
vm.max_map_count=655360
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_max_syn_backlog = 262144
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
EOF
sysctl -p #effective
fi
#修改open files数目
if [ grep -v '^\s*#' /etc/security/limits.conf |grep -c 'soft nofile' -eq 0 ];then
cat >> /etc/security/limits.conf <<EOF
- soft nofile 65535
- hard nofile 65535 EOF ulimit -HSn 65535 fi
if [ grep -v '^\s*#' /etc/security/limits.d/20-nproc.conf |grep -c 'soft nofile' -eq 0 ];then
rm -rf /etc/security/limits.d/20-nproc.conf
cp $PACKAGE_DIR/20-nproc.conf /etc/security/limits.d/
fi
if [ grep -v '^\s*#' /etc/systemd/system.conf |grep -c 'DefaultLimitCORE=infinity' -eq 0 ];then
cat >> /etc/systemd/system.conf <<EOF
DefaultLimitCORE=infinity DefaultLimitNOFILE=100000 DefaultLimitNPROC=100000
EOF
fi
if [ grep -v '^\s*#' /etc/systemd/user.conf |grep -c 'DefaultLimitCORE=infinity' -eq 0 ];then
cat >> /etc/systemd/user.conf <<EOF
DefaultLimitCORE=infinity DefaultLimitNOFILE=100000 DefaultLimitNPROC=100000
EOF
