Etapa 1 – Instalando HAProxy e Keepalived para Load Balancer Estimated reading: 3 minutes 147 views Ambiente lb1: 192.168.1.190 lb2: 192.168.1.191 VIP: 192.168.1.200 (o IP flutuante que o kubeadm vai usar) Passo 1 – Pré-requisitos Ubuntu 22.04 (ou similar) Interface de rede: eth0 (verifique com ip a) Acesso root ou sudo Passo 2 – Instalar HAProxy Execute em lb1 e lb2: sudo apt update && sudo apt install -y haproxysudo apt update && sudo apt install -y haproxy Passo 3 – Configurar o HAProxy Em ambos (lb1 e lb2): Edite o arquivo /etc/haproxy/haproxy.cfg: sudo nano /etc/haproxy/haproxy.cfgsudo nano /etc/haproxy/haproxy.cfg Substitua o conteúdo por: global log /dev/log local0 maxconn 2000 daemon defaults log global mode tcp option tcplog timeout connect 10s timeout client 1m timeout server 1m frontend kubernetes-api bind *:6443 default_backend kubernetes-masters backend kubernetes-masters balance roundrobin server master1 192.168.1.201:6443 check server master2 192.168.1.202:6443 checkglobal log /dev/log local0 maxconn 2000 daemon defaults log global mode tcp option tcplog timeout connect 10s timeout client 1m timeout server 1m frontend kubernetes-api bind *:6443 default_backend kubernetes-masters backend kubernetes-masters balance roundrobin server master1 192.168.1.201:6443 check server master2 192.168.1.202:6443 check Altere os IPs 192.168.1.201 e 202 conforme o IP dos seus control planes. Salve e reinicie o serviço: sudo systemctl restart haproxy sudo systemctl enable haproxysudo systemctl restart haproxy sudo systemctl enable haproxy Passo 4 – Instalar Keepalived Execute em lb1 e lb2: sudo apt install -y keepalivedsudo apt install -y keepalived Passo 5 – Configurar o Keepalived Em lb1 (PRINCIPAL): cat <<EOF | sudo tee /etc/keepalived/keepalived.conf vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 101 advert_int 1 authentication { auth_type PASS auth_pass kubevip } virtual_ipaddress { 192.168.1.200 } } EOFcat <<EOF | sudo tee /etc/keepalived/keepalived.conf vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 101 advert_int 1 authentication { auth_type PASS auth_pass kubevip } virtual_ipaddress { 192.168.1.200 } } EOF Em lb2 (BACKUP): cat <<EOF | sudo tee /etc/keepalived/keepalived.conf vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass kubevip } virtual_ipaddress { 192.168.1.200 } } EOFcat <<EOF | sudo tee /etc/keepalived/keepalived.conf vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass kubevip } virtual_ipaddress { 192.168.1.200 } } EOF Substitua eth0 se o nome da sua interface for diferente (use “ip add” para conferir). Passo 6 – Iniciar o Keepalived Execute em ambos: sudo systemctl restart keepalived sudo systemctl enable keepalivedsudo systemctl restart keepalived sudo systemctl enable keepalived Testar o VIP De outro host (ou mesmo do master), execute: ping 192.168.1.200ping 192.168.1.200 Desligue o lb1 (temporariamente) e veja se o IP flutuante continua pingando via lb2. Ligue de novo e veja se ele reassume. Agora você pode iniciar instalando seu cluster kubernetes na Etapa 2 – Instalação do Cluster Kubernetes com kubeadm
