From dfea790b36ddab4c6661436c8eed3cea7af5bd3a Mon Sep 17 00:00:00 2001 From: Daniil Baturin Date: Wed, 6 May 2026 14:08:24 +0100 Subject: Revert "Add incremental RST-to-MyST swap mechanism (#1857)" (#1892) This reverts commit 4b36114e053ee11d0cb264a1e4cfe4692d78f194. --- docs/configuration/loadbalancing/md-haproxy.md | 510 ------------------------- 1 file changed, 510 deletions(-) delete mode 100644 docs/configuration/loadbalancing/md-haproxy.md (limited to 'docs/configuration/loadbalancing/md-haproxy.md') diff --git a/docs/configuration/loadbalancing/md-haproxy.md b/docs/configuration/loadbalancing/md-haproxy.md deleted file mode 100644 index d60c5248..00000000 --- a/docs/configuration/loadbalancing/md-haproxy.md +++ /dev/null @@ -1,510 +0,0 @@ ---- -lastproofread: '2026-04-06' ---- - -# HAproxy - -```{include} /_include/need_improvement.txt -``` - -HAProxy is a load balancer and proxy server that provides -high-availability, load balancing, and proxying for TCP (level 4) and -HTTP-based (level 7) applications. - -## Configuration - -Service configuration specifies the port to bind to. Backend -configuration defines the load balancing method and specifies the backend -servers. - -### Service - -```{cfgcmd} set load-balancing haproxy service \ listen-address \ - -Set the IP address for the service to bind to. By default, the service -listens on all IPv4 and IPv6 addresses. -``` - -```{cfgcmd} set load-balancing haproxy service \ port \ - -Create service ** to listen on \ -``` - -```{cfgcmd} set load-balancing haproxy service \ mode \ - -Configure service ** mode TCP or HTTP -``` - -```{cfgcmd} set load-balancing haproxy service \ backend \ - -Configure service ** to use the backend \ -``` - -```{cfgcmd} set load-balancing haproxy service \ ssl certificate \ - -Set the SSL certificate \ for service \. You can define -multiple certificates. -``` - -```{cfgcmd} set load-balancing haproxy service \ http-response-headers \ value \ - -Set custom HTTP headers to include in all responses. -``` - -```{cfgcmd} set load-balancing haproxy service \ logging facility \ level \ - -Specify facility and level for logging. -For an explanation on {ref}`syslog_facilities` and -{ref}`syslog_severity_level`, -see tables in the syslog configuration section. -``` - -```{cfgcmd} set load-balancing haproxy service \ timeout client \ - -Set the maximum inactivity time on the client side for this service. -Value range 1-3600 seconds. -``` - -```{cfgcmd} set load-balancing haproxy service \ http-compression algorithm \ - -Set the compression algorithm to be used when compressing HTTP responses. -``` - -```{cfgcmd} set load-balancing haproxy service \ http-compression mime-type \ - -Set the list of HTTP response MIME types which haproxy will attempt to -compress, if received uncompressed from backend server. -``` - -#### Rules - -Rules control and route incoming traffic to specific backends based on -predefined conditions. Rules define matching criteria and specify actions -to perform. - -```{cfgcmd} set load-balancing haproxy service \ rule \ domain-name \ - -Match domain name -``` - -````{cfgcmd} set load-balancing haproxy service \ rule \ ssl \ - -```{eval-rst} -SSL match Server Name Indication (SNI) option: - * ``req-ssl-sni`` SSL Server Name Indication (SNI) request match - * ``ssl-fc-sni`` SSL frontend connection Server Name Indication match - * ``ssl-fc-sni-end`` SSL frontend match end of connection Server Name - - Indication -``` -```` - -````{cfgcmd} set load-balancing haproxy service \ rule \ url-path \ \ - -Define URL path matching rules for a specific service. Use this command -to specify how to match the URL path against incoming requests. - -```{eval-rst} -The available options for are: - * ``begin`` Matches the beginning of the URL path - * ``end`` Matches the end of the URL path. - * ``exact`` Matches the URL path exactly. -``` -```` - -```{cfgcmd} set load-balancing haproxy service \ rule \ set backend \ - -Assign a specific backend to a rule -``` - -```{cfgcmd} set load-balancing haproxy service \ rule \ redirect-location \ - -Redirect URL to a new location. -``` - -### Backend - -````{cfgcmd} set load-balancing haproxy backend \ balance \ - -Specify the load balancing algorithm for distributing requests among -available servers. - -```{eval-rst} -Balance algorithms: - * ``source-address`` Distributes requests based on the source IP address - of the client. - * ``round-robin`` Distributes requests in a circular manner, - sequentially sending each request to the next server in line. - * ``least-connection`` Distributes requests to the server with the fewest - active connections. -``` -```` - -```{cfgcmd} set load-balancing haproxy backend \ mode \ - -Configure backend ** mode TCP or HTTP. -``` - -```{cfgcmd} set load-balancing haproxy backend \ server \ address \ - -Set the address of the backend server that receives incoming traffic. -``` - -```{cfgcmd} set load-balancing haproxy backend \ server \ port \ - -Set the address of the backend port. -``` - -```{cfgcmd} set load-balancing haproxy backend \ server \ check - -Active health check backend server. -``` - -```{cfgcmd} set load-balancing haproxy backend \ server \ check port \ - -Set an alternative port number for health checks. -Overrides the default server port used for TCP/HTTP checks. -``` - -```{cfgcmd} set load-balancing haproxy backend \ server \ send-proxy - -Send a Proxy Protocol version 1 header (text format). -``` - -```{cfgcmd} set load-balancing haproxy backend \ server \ send-proxy-v2 - -Send a Proxy Protocol version 2 header (binary format). -``` - -```{cfgcmd} set load-balancing haproxy backend \ ssl ca-certificate \ - -Use SSL encryption for backend requests and authenticate the backend -against ````. -``` - -```{cfgcmd} set load-balancing haproxy backend \ ssl no-verify - -Use SSL encryption for backend requests without validating the server -certificate. -``` - -```{cfgcmd} set load-balancing haproxy backend \ http-response-headers \ value \ - -Set custom HTTP headers to include in all responses from the backend. -``` - -```{cfgcmd} set load-balancing haproxy backend \ logging facility \ level \ - -Specify facility and level for logging. -For an explanation on {ref}`syslog_facilities` and -{ref}`syslog_severity_level`, -see tables in the syslog configuration section. -``` - -```{cfgcmd} set load-balancing haproxy backend \ timeout check \ - -Set the timeout in seconds for established connections. -Value range 1-3600 seconds. -``` -```{cfgcmd} set load-balancing haproxy backend \ timeout connect \ - -Set the maximum time to wait for a connection attempt to a server to succeed. -Value range 1-3600 seconds. -``` - - -```{cfgcmd} set load-balancing haproxy backend \ timeout server \ - -Set the maximum inactivity time on the server side. -Value range 1-3600 seconds. -``` - -### Global - -Global configuration parameters: - -```{cfgcmd} set load-balancing haproxy global-parameters max-connections \ - -Limit maximum number of connections -``` - - -```{cfgcmd} set load-balancing haproxy global-parameters ssl-bind-ciphers \ - -Limit the cipher algorithms allowed during SSL/TLS handshake. -``` - - -```{cfgcmd} set load-balancing haproxy global-parameters tls-version-min \ - -Specify the minimum required TLS version 1.2 or 1.3 -``` - - -```{cfgcmd} set load-balancing haproxy global-parameters logging facility \ level \ - -Specify facility and level for logging. -For an explanation on {ref}`syslog_facilities` and -{ref}`syslog_severity_level`, -see tables in the syslog configuration section. -``` - - -```{cfgcmd} set load-balancing haproxy timeout check \ - -Set the timeout in seconds for established connections. -Value range 1-3600 seconds. Default is 5 seconds. -``` - - -```{cfgcmd} set load-balancing haproxy timeout client \ - -Set the maximum inactivity time on the client side. -Value range 1-3600 seconds. Default is 50 seconds. -``` - - -```{cfgcmd} set load-balancing haproxy timeout connect \ - -Set the maximum time to wait for a connection attempt to a server to succeed. -Value range 1-3600 seconds. Default is 10 seconds. -``` - - -```{cfgcmd} set load-balancing haproxy timeout server \ - -Set the maximum inactivity time on the server side. -Value range 1-3600 seconds. Default is 50 seconds. -``` - -## Health checks - - -### HTTP checks - - -Use HTTP health checks to monitor web applications that provide health status -information and determine their availability. - -```{cfgcmd} set load-balancing haproxy backend \ http-check - -Enables HTTP health checks using OPTION HTTP requests against '/' and -expecting a successful response code in the 200-399 range. -``` - - -```{cfgcmd} set load-balancing haproxy backend \ http-check method \ - -Set the HTTP method: ``OPTION``, ``GET``, ``POST``, or ``PUT``. -``` - - -```{cfgcmd} set load-balancing haproxy backend \ http-check uri \ - -Set the endpoint to use for health checks. -``` - - -````{cfgcmd} set load-balancing haproxy backend \ http-check expect \ - -Set the expected result condition for a server to be considered healthy. - -```{eval-rst} -Some possible examples are: - * ``status 200`` Expecting a 200 response code - * ``status 200-399`` Expecting a non-failure response code - * ``string success`` Expecting the string success in the response body -``` -```` - -### TCP checks - -Configure health checks for TCP mode backends. You can configure protocol-aware -checks for a range of Layer 7 protocols: - -````{cfgcmd} set load-balancing haproxy backend \ health-check \ - -```{eval-rst} -Available health check protocols: - * ``ldap`` LDAP protocol check. - * ``redis`` Redis protocol check. - * ``mysql`` MySQL protocol check. - * ``pgsql`` PostgreSQL protocol check. - * ``smtp`` SMTP protocol check. -``` -```` - -:::{note} -If you specify a server to check but do not configure a -protocol, HAProxy performs a basic TCP health check. A server is online if -it responds to a connection attempt with a valid `SYN/ACK` packet. -::: -## Redirect HTTP to HTTPS - -Configure a HAProxy service for HTTP that listens on port 80 and redirects -incoming requests to HTTPS: - -```none -set load-balancing haproxy service http port '80' -set load-balancing haproxy service http redirect-http-to-https -``` - -You can use a different service name; in this example, `http` is just for -convenience. - -## Examples -### Level 4 balancing - -This configuration enables the TCP reverse proxy for the `my-tcp-api` -service. Incoming TCP connections on port 8888 are load balanced across the -backend servers (srv01 and srv02) using the round-robin load balancing -algorithm. - -```none -set load-balancing haproxy service my-tcp-api backend 'bk-01' -set load-balancing haproxy service my-tcp-api mode 'tcp' -set load-balancing haproxy service my-tcp-api port '8888' - -set load-balancing haproxy backend bk-01 balance 'round-robin' -set load-balancing haproxy backend bk-01 mode 'tcp' - -set load-balancing haproxy backend bk-01 server srv01 address '192.0.2.11' -set load-balancing haproxy backend bk-01 server srv01 port '8881' -set load-balancing haproxy backend bk-01 server srv02 address '192.0.2.12' -set load-balancing haproxy backend bk-01 server srv02 port '8882' -``` - -### Balancing based on domain name - -The following configuration demonstrates how to use VyOS -to achieve load balancing based on the domain name: - -The HTTP service listens on TCP port 80. - -Rule 10 matches requests with the domain name `node1.example.com` and -forwards them to the backend `bk-api-01`. - -Rule 20 matches requests with the domain name `node2.example.com` and -forwards them to the backend `bk-api-02`. - -```none -set load-balancing haproxy service http description 'bind app listen on 443 port' -set load-balancing haproxy service http mode 'tcp' -set load-balancing haproxy service http port '80' - -set load-balancing haproxy service http rule 10 domain-name 'node1.example.com' -set load-balancing haproxy service http rule 10 set backend 'bk-api-01' -set load-balancing haproxy service http rule 20 domain-name 'node2.example.com' -set load-balancing haproxy service http rule 20 set backend 'bk-api-02' - -set load-balancing haproxy backend bk-api-01 description 'My API-1' -set load-balancing haproxy backend bk-api-01 mode 'tcp' -set load-balancing haproxy backend bk-api-01 server api01 address '127.0.0.1' -set load-balancing haproxy backend bk-api-01 server api01 port '4431' -set load-balancing haproxy backend bk-api-02 description 'My API-2' -set load-balancing haproxy backend bk-api-02 mode 'tcp' -set load-balancing haproxy backend bk-api-02 server api01 address '127.0.0.2' -set load-balancing haproxy backend bk-api-02 server api01 port '4432' -``` - -### Terminate SSL - -The following configuration terminates SSL on the router. - -The `http` service listens on port 80 and redirects HTTP requests to -HTTPS. - -The `https` service listens on port 443 with the `bk-default` backend -and handles HTTPS traffic using the `cert` certificate for SSL termination. -The HSTS header is set with a 1-year expiry to tell browsers to always use -SSL for the site. - -Rule 10 matches requests with the exact URL path `/.well-known/xxx` and -redirects them to `/certs/`. - -Rule 20 matches requests with URL paths ending in `/mail` or the exact -path `/email/bar` and redirects them to `/postfix/`. - -Global parameters include a maximum connection limit of 4000 and a minimum -TLS version of 1.3. - -```none -set load-balancing haproxy service http description 'Force redirect to HTTPS' -set load-balancing haproxy service http port '80' -set load-balancing haproxy service http redirect-http-to-https - -set load-balancing haproxy service https backend 'bk-default' -set load-balancing haproxy service https description 'listen on 443 port' -set load-balancing haproxy service https mode 'http' -set load-balancing haproxy service https port '443' -set load-balancing haproxy service https ssl certificate 'cert' -set load-balancing haproxy service https http-response-headers Strict-Transport-Security value 'max-age=31536000' - -set load-balancing haproxy service https rule 10 url-path exact '/.well-known/xxx' -set load-balancing haproxy service https rule 10 set redirect-location '/certs/' -set load-balancing haproxy service https rule 20 url-path end '/mail' -set load-balancing haproxy service https rule 20 url-path exact '/email/bar' -set load-balancing haproxy service https rule 20 set redirect-location '/postfix/' - -set load-balancing haproxy backend bk-default description 'Default backend' -set load-balancing haproxy backend bk-default mode 'http' -set load-balancing haproxy backend bk-default server sr01 address '192.0.2.23' -set load-balancing haproxy backend bk-default server sr01 port '80' - -set load-balancing haproxy global-parameters max-connections '4000' -set load-balancing haproxy global-parameters tls-version-min '1.3' -``` - -### SSL Bridging - -The following configuration terminates incoming HTTPS traffic on the router, -then re-encrypts the traffic and sends it to the backend server via HTTPS. -Use this when encryption is required for both paths but you do not want to -install publicly trusted certificates on each backend server. - -Backend service certificates are checked against the certificate authority -specified in the configuration, which could be an internal CA. - -The `https` service listens on port 443 with backend `bk-bridge-ssl` to -handle HTTPS traffic. It uses certificate named `cert` for SSL termination. - -The `bk-bridge-ssl` backend connects to `sr01` server on port 443 via HTTPS -and checks backend server has a valid certificate trusted by CA `cacert` - -```none -set load-balancing haproxy service https backend 'bk-bridge-ssl' -set load-balancing haproxy service https description 'listen on 443 port' -set load-balancing haproxy service https mode 'http' -set load-balancing haproxy service https port '443' -set load-balancing haproxy service https ssl certificate 'cert' - -set load-balancing haproxy backend bk-bridge-ssl description 'SSL backend' -set load-balancing haproxy backend bk-bridge-ssl mode 'http' -set load-balancing haproxy backend bk-bridge-ssl ssl ca-certificate 'cacert' -set load-balancing haproxy backend bk-bridge-ssl server sr01 address '192.0.2.23' -set load-balancing haproxy backend bk-bridge-ssl server sr01 port '443' -``` - -### Balancing with HTTP health checks - -This configuration enables HTTP health checks for backend servers. - -```none -set load-balancing haproxy service my-tcp-api backend 'bk-01' -set load-balancing haproxy service my-tcp-api mode 'tcp' -set load-balancing haproxy service my-tcp-api port '8888' - -set load-balancing haproxy backend bk-01 balance 'round-robin' -set load-balancing haproxy backend bk-01 mode 'tcp' - -set load-balancing haproxy backend bk-01 http-check method 'get' -set load-balancing haproxy backend bk-01 http-check uri '/health' -set load-balancing haproxy backend bk-01 http-check expect 'status 200' - -set load-balancing haproxy backend bk-01 server srv01 address '192.0.2.11' -set load-balancing haproxy backend bk-01 server srv01 port '8881' -set load-balancing haproxy backend bk-01 server srv01 check -set load-balancing haproxy backend bk-01 server srv02 address '192.0.2.12' -set load-balancing haproxy backend bk-01 server srv02 port '8882' -set load-balancing haproxy backend bk-01 server srv02 check port '8892' -``` -- cgit v1.2.3