traefik/docs/configuration/backends/etcd.md

Etcd Backend

Træfik can be configured to use Etcd as a backend configuration.

################################################################
# Etcd configuration backend
################################################################

# Enable Etcd configuration backend.
[etcd]

# Etcd server endpoint.
#
# Required
# Default: "127.0.0.1:2379"
#
endpoint = "127.0.0.1:2379"

# Enable watch Etcd changes.
#
# Optional
# Default: true
#
watch = true

# Prefix used for KV store.
#
# Optional
# Default: "/traefik"
#
prefix = "/traefik"

# Force to use API V3 (otherwise still use API V2)
#
# Deprecated
#
# Optional
# Default: false
#
useAPIV3 = true


# Override default configuration template.
# For advanced users :)
#
# Optional
#
# filename = "etcd.tmpl"

# Use etcd user/pass authentication.
#
# Optional
#
# username = foo
# password = bar

# Enable etcd TLS connection.
#
# Optional
#
#    [etcd.tls]
#    ca = "/etc/ssl/ca.crt"
#    cert = "/etc/ssl/etcd.crt"
#    key = "/etc/ssl/etcd.key"
#    insecureSkipVerify = true

To enable constraints see backend-specific constraints section.

Please refer to the Key Value storage structure section to get documentation on Traefik KV structure.

!!! note The option useAPIV3 allows using Etcd API V3 only if it's set to true. This option is deprecated and API V2 won't be supported in the future.