HAproxy

HAproxy

Config TCP

global
        log /dev/log    local0
        log /dev/log    local1 notice
        chroot /var/lib/haproxy
        stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
        stats timeout 30s
        user haproxy
        group haproxy
        daemon

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
        ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorfile 503 /etc/haproxy/errors/503.http
        errorfile 504 /etc/haproxy/errors/504.http

frontend www80_front
        mode tcp
        bind *:80
        default_backend www80_back


backend www80_back
        mode tcp
        balance roundrobin
        server NGINX00 192.168.0.16:80 check weight 60
        server NGINX01 192.168.0.17:80 check weight 40

Config http vhost

frontend www80_front
        bind *:80
        acl is_nginx02.example.com hdr_end(host) -i nginx02.example.com
        use_backend vhost_redirect_back if is_nginx02.example.com
        default_backend www80_back


backend www80_back
        balance roundrobin
        server NGINX00 192.168.0.16:80 check weight 60
        server NGINX01 192.168.0.17:80 check weight 40

backend vhost_redirect_back
        server NGINX02 192.168.0.18:80 check

Config https vhost

frontend www80_front
        bind *:80
        acl is_ok.trastero.org hdr_end(host) -i ok.trastero.org
        use_backend vhost_redirect_back if is_ok.trastero.org
        default_backend www80_back

frontend www443_front
        mode tcp
        option tcplog
        bind *:443
        acl tls req.ssl_hello_type 1
        tcp-request inspect-delay 5s
        tcp-request content accept if tls

        acl is_ok.trastero.org_443 req.ssl_sni -i ok.trastero.org
        use_backend vhost_redirect_back_443 if is_ok.trastero.org_443
        default_backend www443_back

backend www80_back
        balance roundrobin
        server k3s00 k3s00.local:80 check weight 60
        server k3s01 k3s01.local:80 check weight 40
        server k3s02 k3s02.local:80 check weight 40

backend www443_back
        mode tcp
        balance roundrobin
        server k3s00 k3s00.local:443 check weight 60
        server k3s01 k3s01.local:443 check weight 40
        server k3s02 k3s02.local:443 check weight 40

backend vhost_redirect_back
        server OK00 192.168.0.165:80 check

backend vhost_redirect_back_443
        mode tcp
        option tcplog
        option ssl-hello-chk
        server OK00443 192.168.0.165:443

KeepAlived

install on debian

apt install -y keepalived psmisc
touch /etc/keepalived/keepalived.conf

Master /etc/keepalived/keepalived.conf

vrrp_script chk_haproxy {
    script "killall -0 haproxy"   # verify the pid existance
    interval 2                    # check every 2 seconds
    weight 2                      # add 2 points of prio if OK
}

vrrp_instance VI_1 {
    interface eth0                # interface to monitor
    state MASTER
    virtual_router_id 51          # Assign one ID for this route
    priority 101                  # 101 on master, 100 on backup
    virtual_ipaddress {
        192.168.0.99              # the virtual IP
    }
    track_script {
        chk_haproxy
    }
}

Slave /etc/keepalived/keepalived.conf

vrrp_script chk_haproxy {
    script "killall -0 haproxy"   # verify the pid existance
    interval 2                    # check every 2 seconds
    weight 2                      # add 2 points of prio if OK
}

vrrp_instance VI_1 {
    interface eth0                # interface to monitor
    state BACKUP
    virtual_router_id 51          # Assign one ID for this route
    priority 100                  # 101 on master, 100 on backup
    virtual_ipaddress {
        192.168.0.99              # the virtual IP
    }
    track_script {
        chk_haproxy
    }
}