優化CentOS上的Kubernetes(K8S)部署可以從多個方面入手,包括系統初始化、軟件安裝、網絡配置和資源管理等。以下是一些詳細的優化策略:
系統初始化和配置:
/etc/sysctl.d/k8s.conf
文件,優化內核參數,例如:net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
vm.overcommit_memory = 1
vm.panic_on_oom = 0
fs.inotify.max_user_watches = 89100
fs.file-max = 52706963
fs.nr_open = 52706963
net.netfilter.nf_conntrack_max = 2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
執行 sysctl -p /etc/sysctl.d/k8s.conf
使配置生效。軟件安裝和配置:
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install -y docker-ce docker-ce-cli containerd.io
systemctl enable docker
systemctl start docker
sudo setenforce 0
sudo sed -i --follow-symlinks 's/^SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
hostnamectl set-hostname <hostname>
cat >> /etc/hosts << eof
192.168.2.190 k8s-master
192.168.2.126 k8s-node1
192.168.2.135 k8s-node2
eof
網絡配置:
資源管理和優化:
監控和日志管理:
通過這些優化措施,可以顯著提升CentOS上Kubernetes集群的性能和穩定性。具體的配置參數可能需要根據實際的集群規模、網絡環境和性能需求進行調整。