Add KV store providers (dynamic configuration only)

Co-authored-by: Jean-Baptiste Doumenjou <jb.doumenjou@gmail.com>

docs/content/reference/static-configuration/env-ref.md

@@ -243,6 +243,9 @@ EntryPoint (Default: ```traefik```)
 `TRAEFIK_PING_MANUALROUTING`:  
 Manual routing (Default: ```false```)
 
+`TRAEFIK_PROVIDERS_CONSUL`:  
+Enable Consul backend with default settings. (Default: ```false```)
+
 `TRAEFIK_PROVIDERS_CONSULCATALOG_CACHE`:  
 Use local agent caching for catalog reads. (Default: ```false```)
 
@@ -303,6 +306,33 @@ Forces the read to be fully consistent. (Default: ```false```)
 `TRAEFIK_PROVIDERS_CONSULCATALOG_STALE`:  
 Use stale consistency for catalog reads. (Default: ```false```)
 
+`TRAEFIK_PROVIDERS_CONSUL_ENDPOINTS`:  
+KV store endpoints (Default: ```127.0.0.1:8500```)
+
+`TRAEFIK_PROVIDERS_CONSUL_PASSWORD`:  
+KV Password
+
+`TRAEFIK_PROVIDERS_CONSUL_ROOTKEY`:  
+Root key used for KV store (Default: ```traefik```)
+
+`TRAEFIK_PROVIDERS_CONSUL_TLS_CA`:  
+TLS CA
+
+`TRAEFIK_PROVIDERS_CONSUL_TLS_CAOPTIONAL`:  
+TLS CA.Optional (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_CONSUL_TLS_CERT`:  
+TLS cert
+
+`TRAEFIK_PROVIDERS_CONSUL_TLS_INSECURESKIPVERIFY`:  
+TLS insecure skip verify (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_CONSUL_TLS_KEY`:  
+TLS key
+
+`TRAEFIK_PROVIDERS_CONSUL_USERNAME`:  
+KV Username
+
 `TRAEFIK_PROVIDERS_DOCKER`:  
 Enable Docker backend with default settings. (Default: ```false```)
 
@@ -348,6 +378,36 @@ Use the ip address from the bound port, rather than from the inner network. (Def
 `TRAEFIK_PROVIDERS_DOCKER_WATCH`:  
 Watch provider. (Default: ```true```)
 
+`TRAEFIK_PROVIDERS_ETCD`:  
+Enable Etcd backend with default settings. (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_ETCD_ENDPOINTS`:  
+KV store endpoints (Default: ```127.0.0.1:2379```)
+
+`TRAEFIK_PROVIDERS_ETCD_PASSWORD`:  
+KV Password
+
+`TRAEFIK_PROVIDERS_ETCD_ROOTKEY`:  
+Root key used for KV store (Default: ```traefik```)
+
+`TRAEFIK_PROVIDERS_ETCD_TLS_CA`:  
+TLS CA
+
+`TRAEFIK_PROVIDERS_ETCD_TLS_CAOPTIONAL`:  
+TLS CA.Optional (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_ETCD_TLS_CERT`:  
+TLS cert
+
+`TRAEFIK_PROVIDERS_ETCD_TLS_INSECURESKIPVERIFY`:  
+TLS insecure skip verify (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_ETCD_TLS_KEY`:  
+TLS key
+
+`TRAEFIK_PROVIDERS_ETCD_USERNAME`:  
+KV Username
+
 `TRAEFIK_PROVIDERS_FILE_DEBUGLOGGENERATEDTEMPLATE`:  
 Enable debug logging of generated configuration template. (Default: ```false```)
 
@@ -516,12 +576,72 @@ Defines the polling interval in seconds. (Default: ```15```)
 `TRAEFIK_PROVIDERS_RANCHER_WATCH`:  
 Watch provider. (Default: ```true```)
 
+`TRAEFIK_PROVIDERS_REDIS`:  
+Enable Redis backend with default settings. (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_REDIS_ENDPOINTS`:  
+KV store endpoints (Default: ```127.0.0.1:6379```)
+
+`TRAEFIK_PROVIDERS_REDIS_PASSWORD`:  
+KV Password
+
+`TRAEFIK_PROVIDERS_REDIS_ROOTKEY`:  
+Root key used for KV store (Default: ```traefik```)
+
+`TRAEFIK_PROVIDERS_REDIS_TLS_CA`:  
+TLS CA
+
+`TRAEFIK_PROVIDERS_REDIS_TLS_CAOPTIONAL`:  
+TLS CA.Optional (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_REDIS_TLS_CERT`:  
+TLS cert
+
+`TRAEFIK_PROVIDERS_REDIS_TLS_INSECURESKIPVERIFY`:  
+TLS insecure skip verify (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_REDIS_TLS_KEY`:  
+TLS key
+
+`TRAEFIK_PROVIDERS_REDIS_USERNAME`:  
+KV Username
+
 `TRAEFIK_PROVIDERS_REST`:  
 Enable Rest backend with default settings. (Default: ```false```)
 
 `TRAEFIK_PROVIDERS_REST_INSECURE`:  
 Activate REST Provider directly on the entryPoint named traefik. (Default: ```false```)
 
+`TRAEFIK_PROVIDERS_ZOOKEEPER`:  
+Enable ZooKeeper backend with default settings. (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_ENDPOINTS`:  
+KV store endpoints (Default: ```127.0.0.1:2181```)
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_PASSWORD`:  
+KV Password
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_ROOTKEY`:  
+Root key used for KV store (Default: ```traefik```)
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_TLS_CA`:  
+TLS CA
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_TLS_CAOPTIONAL`:  
+TLS CA.Optional (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_TLS_CERT`:  
+TLS cert
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_TLS_INSECURESKIPVERIFY`:  
+TLS insecure skip verify (Default: ```false```)
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_TLS_KEY`:  
+TLS key
+
+`TRAEFIK_PROVIDERS_ZOOKEEPER_USERNAME`:  
+KV Username
+
 `TRAEFIK_SERVERSTRANSPORT_FORWARDINGTIMEOUTS_DIALTIMEOUT`:  
 The amount of time to wait until a connection to a backend server can be established. If zero, no timeout exists. (Default: ```30```)