traefik/docs/content/reference/routing-configuration/http/load-balancing/serverstransport.md

title, description

title	description
ServersTransport	ServersTransport allows configuring the connection between Traefik and the HTTP servers.

ServersTransport allows you to configure the transport between Traefik and your HTTP servers.

Configuration Example

Declare the serversTransport:

http:
  serversTransports:
    mytransport:
      serverName: "myhost"
      certificates:
        - "/path/to/cert1.pem"
        - "/path/to/cert2.pem"
      insecureSkipVerify: true
      rootcas:
        - "/path/to/rootca1.pem"
        - "/path/to/rootca2.pem"
      maxIdleConnsPerHost: 100
      disableHTTP2: true
      peerCertURI: "spiffe://example.org/peer"
      forwardingTimeouts:
        dialTimeout: "30s"
        responseHeaderTimeout: "10s"
        idleConnTimeout: "60s"
        readIdleTimeout: "5s"
        pingTimeout: "15s"
      spiffe:
        ids:
          - "spiffe://example.org/id1"
          - "spiffe://example.org/id2"
        trustDomain: "example.org"

[http.serversTransports.mytransport]
  serverName = "myhost"
  certificates = ["/path/to/cert1.pem", "/path/to/cert2.pem"]
  insecureSkipVerify = true
  rootcas = ["/path/to/rootca1.pem", "/path/to/rootca2.pem"]
  maxIdleConnsPerHost = 100
  disableHTTP2 = true
  peerCertURI = "spiffe://example.org/peer"

  [http.serversTransports.mytransport.forwardingTimeouts]
    dialTimeout = "30s"
    responseHeaderTimeout = "10s"
    idleConnTimeout = "60s"
    readIdleTimeout = "5s"
    pingTimeout = "15s"

  [http.serversTransports.mytransport.spiffe]
    ids = ["spiffe://example.org/id1", "spiffe://example.org/id2"]
    trustDomain = "example.org"

Attach the serversTransport to a service:

## Dynamic configuration
http:
  services:
    Service01:
      loadBalancer:
        serversTransport: mytransport

## Dynamic configuration
[http.services]
  [http.services.Service01]
    [http.services.Service01.loadBalancer]
      serversTransport = "mytransport"

labels:
  - "traefik.http.services.Service01.loadBalancer.serversTransport=mytransport"

{
  // ...
  "Tags": [
    "traefik.http.services.Service01.loadBalancer.serversTransport=mytransport"
  ]
}

Configuration Options

Field	Description	Default	Required
serverName	Configures the server name that will be used as the SNI.	""	No
certificates	Defines the list of certificates (as file paths, or data bytes) that will be set as client certificates for mTLS.	[]	No
insecureSkipVerify	Controls whether the server's certificate chain and host name is verified.	false	No
rootcas	Set of root certificate authorities to use when verifying server certificates. (for mTLS connections).	[]	No
maxIdleConnsPerHost	Maximum idle (keep-alive) connections to keep per-host.	200	No
disableHTTP2	Disables HTTP/2 for connections with servers.	false	No
peerCertURI	Defines the URI used to match against SAN URIs during the server's certificate verification.	""	No
forwardingTimeouts.dialTimeout	Amount of time to wait until a connection to a server can be established. 0 = no timeout	30s	No
forwardingTimeouts.responseHeaderTimeout	Amount of time to wait for a server's response headers after fully writing the request (including its body, if any). 0 = no timeout	0s	No
forwardingTimeouts.idleConnTimeout	Maximum amount of time an idle (keep-alive) connection will remain idle before closing itself. 0 = no timeout	90s	No
forwardingTimeouts.readIdleTimeout	Defines the timeout after which a health check using ping frame will be carried out if no frame is received on the HTTP/2 connection.	0s	No
forwardingTimeouts.pingTimeout	Defines the timeout after which the HTTP/2 connection will be closed if a response to ping is not received.	15s	No
spiffe	Defines the SPIFFE configuration. An empty spiffe section enables SPIFFE (that allows any SPIFFE ID).		No
spiffe.ids	Defines the allowed SPIFFE IDs. This takes precedence over the SPIFFE TrustDomain.	[]	No
spiffe.trustDomain	Defines the SPIFFE trust domain.	""	No