T5222: Add load-balancing for web traffic

2 files changed, 168 insertions, 0 deletions

diff --git a/data/templates/load-balancing/haproxy.cfg.j2 b/data/templates/load-balancing/haproxy.cfg.j2
new file mode 100644
index 000000000..3d98d78b7
--- /dev/null
+++ b/data/templates/load-balancing/haproxy.cfg.j2
@@ -0,0 +1,154 @@
+# Generated by ${vyos_conf_scripts_dir}/load-balancing-haproxy.py
+
+global
+    log /dev/log local0
+    log /dev/log local1 notice
+    chroot /var/lib/haproxy
+    stats socket /run/haproxy/admin.sock mode 660 level admin
+    stats timeout 30s
+    user haproxy
+    group haproxy
+    daemon
+
+{% if global_parameters is vyos_defined %}
+{%     if global_parameters.max_connections is vyos_defined %}
+    maxconn {{ global_parameters.max_connections }}
+{%     endif %}
+
+    # Default SSL material locations
+    ca-base /etc/ssl/certs
+    crt-base /etc/ssl/private
+
+{%     if global_parameters.tls.ssl_bind_ciphers is vyos_defined %}
+    # https://ssl-config.mozilla.org/#server=haproxy&version=2.6.12-1&config=intermediate&openssl=3.0.8-1&guideline=5.6
+    ssl-default-bind-ciphers {{ global_parameters.tls.ssl_bind_ciphers | join(':') | upper }}
+{%     endif %}
+    ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
+{%     if global_parameters.tls.tls_version_min is vyos_defined('1.3') %}
+    ssl-default-bind-options force-tlsv13
+{%     else %}
+    ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets
+{%     endif %}
+{% endif %}
+
+defaults
+    log     global
+    mode    http
+    option  dontlognull
+    timeout connect 10s
+    timeout client  50s
+    timeout server  50s
+    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
+{% if server is vyos_defined %}
+{%     for front, front_config in server.items() %}
+frontend {{ front }}
+{%         set ssl_front =  'ssl crt /run/haproxy/' ~ front_config.ssl.certificate ~ '.pem' if front_config.ssl.certificate is vyos_defined else '' %}
+    bind {{ front_config.listen_address if front_config.listen_address if vyos_defined else '*' }}:{{ front_config.port }} {{ ssl_front }}
+{%         if front_config.redirect_http_to_https is vyos_defined %}
+    http-request redirect scheme https unless { ssl_fc }
+{%         endif %}
+{%         if front_config.mode is vyos_defined %}
+    mode {{ front_config.mode }}
+{%         endif %}
+{%         if front_config.rule is vyos_defined %}
+{%             for rule, rule_config in front_config.rule.items() %}
+    # rule {{ rule }}
+{%                 if rule_config.domain_name is vyos_defined and rule_config.set.server is vyos_defined %}
+{%                     set rule_options = 'hdr(host)' %}
+{%                     if rule_config.ssl is vyos_defined %}
+{%                         set ssl_rule_translate = {'req-ssl-sni': 'req_ssl_sni', 'ssl-fc-sni': 'ssl_fc_sni', 'ssl-fc-sni-end': 'ssl_fc_sni_end'} %}
+{%                         set rule_options = ssl_rule_translate[rule_config.ssl] %}
+{%                     endif %}
+    acl {{ rule }} {{ rule_options }} -i {{ rule_config.domain_name }}
+    use_backend {{ rule_config.set.server }} if {{ rule }}
+{%                 endif %}
+{# path url #}
+{%                 if rule_config.url_path is vyos_defined and rule_config.set.redirect_location is vyos_defined %}
+{%                     set path_mod_translate = {'begin': '-i -m beg', 'end': '-i -m end', 'exact': ''} %}
+{%                     for path, path_config in rule_config.url_path.items() %}
+{%                         for url in path_config %}
+    acl {{ rule }} path {{ path_mod_translate[path] }} {{ url }}
+{%                         endfor %}
+{%                     endfor %}
+    http-request redirect location {{ rule_config.set.redirect_location }} code 301 if {{ rule }}
+{%                 endif %}
+{# endpath #}
+{%             endfor %}
+{%         endif %}
+{%         if front_config.backend is vyos_defined %}
+{%             for backend in front_config.backend %}
+    default_backend {{ backend }}
+{%             endfor %}
+{%         endif %}
+
+{%     endfor %}
+{% endif %}
+
+# Backend
+{% if backend is vyos_defined %}
+{%     for back, back_config in backend.items() %}
+backend {{ back }}
+{%         if back_config.balance is vyos_defined %}
+{%             set balance_translate = {'least-connection': 'leastconn', 'round-robin': 'roundrobin', 'source-address': 'source'} %}
+    balance {{ balance_translate[back_config.balance] }}
+{%         endif %}
+{# If mode is not TCP skip Forwarded #}
+{%         if back_config.mode is not vyos_defined('tcp') %}
+    option forwardfor
+    http-request set-header X-Forwarded-Port %[dst_port]
+    http-request add-header X-Forwarded-Proto https if { ssl_fc }
+{%         endif %}
+{%         if back_config.mode is vyos_defined %}
+    mode {{ back_config.mode }}
+{%         endif %}
+{%         if back_config.rule is vyos_defined %}
+{%             for rule, rule_config in back_config.rule.items() %}
+{%                 if rule_config.domain_name is vyos_defined and rule_config.set.server is vyos_defined %}
+{%                     set rule_options = 'hdr(host)' %}
+{%                     if rule_config.ssl is vyos_defined %}
+{%                         set ssl_rule_translate = {'req-ssl-sni': 'req_ssl_sni', 'ssl-fc-sni': 'ssl_fc_sni', 'ssl-fc-sni-end': 'ssl_fc_sni_end'} %}
+{%                         set rule_options = ssl_rule_translate[rule_config.ssl] %}
+{%                     endif %}
+    acl {{ rule }} {{ rule_options }} -i {{ rule_config.domain_name }}
+    use-server {{ rule_config.set.server }} if {{ rule }}
+{%                 endif %}
+{# path url #}
+{%                 if rule_config.url_path is vyos_defined and rule_config.set.redirect_location is vyos_defined %}
+{%                     set path_mod_translate = {'begin': '-i -m beg', 'end': '-i -m end', 'exact': ''} %}
+{%                     for path, path_config in rule_config.url_path.items() %}
+{%                         for url in path_config %}
+    acl {{ rule }} path {{ path_mod_translate[path] }} {{ url }}
+{%                         endfor %}
+{%                     endfor %}
+    http-request redirect location {{ rule_config.set.redirect_location }} code 301 if {{ rule }}
+{%                 endif %}
+{# endpath #}
+{%             endfor %}
+{%         endif %}
+{%         if back_config.server is vyos_defined %}
+{%             set ssl_back =  'ssl ca-file /run/haproxy/' ~ back_config.ssl.ca_certificate ~ '.pem' if back_config.ssl.ca_certificate is vyos_defined else '' %}
+{%             for server, server_config in back_config.server.items() %}
+    server {{ server }} {{ server_config.address }}:{{ server_config.port }} {{ 'check' if server_config.check is vyos_defined }} {{ ssl_back }}
+{%             endfor %}
+{%         endif %}
+{%         if back_config.timeout.check is vyos_defined %}
+    timeout check {{ back_config.timeout.check }}
+{%         endif %}
+{%         if back_config.timeout.connect is vyos_defined %}
+    timeout connect {{ back_config.timeout.connect }}
+{%         endif %}
+{%         if back_config.timeout.server is vyos_defined %}
+    timeout server {{ back_config.timeout.server }}
+{%         endif %}
+
+{%     endfor %}
+{% endif %}
+
diff --git a/data/templates/load-balancing/override_haproxy.conf.j2 b/data/templates/load-balancing/override_haproxy.conf.j2
new file mode 100644
index 000000000..395b5d279
--- /dev/null
+++ b/data/templates/load-balancing/override_haproxy.conf.j2
@@ -0,0 +1,14 @@
+{% set haproxy_command = 'ip vrf exec ' ~ vrf ~ ' ' if vrf is vyos_defined else '' %}
+[Unit]
+StartLimitIntervalSec=0
+After=vyos-router.service
+ConditionPathExists=/run/haproxy/haproxy.cfg
+
+[Service]
+EnvironmentFile=
+Environment=
+Environment="CONFIG=/run/haproxy/haproxy.cfg" "PIDFILE=/run/haproxy.pid" "EXTRAOPTS=-S /run/haproxy-master.sock"
+ExecStart=
+ExecStart={{ haproxy_command }}/usr/sbin/haproxy -Ws -f /run/haproxy/haproxy.cfg -p /run/haproxy.pid -S /run/haproxy-master.sock
+Restart=always
+RestartSec=10