distributor ha_tracker config

[zhuchqun]

I want to implement distributor ha_tracker through etcd, but I check that there is no corresponding prefix in etcd, please help me. Here is my relevant configuration:
distributor:
pool:
health_check_ingesters: true
ha_tracker:
enable_ha_tracker: true
ha_tracker_update_timeout: 15s
ha_tracker_update_timeout_jitter_max: 5s
ha_tracker_failover_timeout: 30s
kvstore:
store: "etcd"
prefix: "/cortex/ha-tracker/"
etcd:
endpoints: ["192.168.2.61:2379","192.168.2.30:2379","192.168.2.159:2379"]
dial_timeout: 10s
max_retries: 10
tls_enabled: true
tls_cert_path: "/opt/cortex/pki/server.crt"
tls_key_path: "/opt/cortex/pki/server.key"
tls_ca_path: "/opt/cortex/pki/ca.crt"
tls_insecure_skip_verify: true
max_recv_msg_size: 104857600
remote_timeout: 15s
extra_queue_delay: 0s
sharding_strategy: default
shard_by_all_labels: true
extend_writes: true
ring:
kvstore:
store: "etcd"
prefix: "/cortex/collectors/"
etcd:
endpoints: ["192.168.2.61:2379","192.168.2.30:2379","192.168.2.159:2379"]
dial_timeout: 10s
max_retries: 10
tls_enabled: true
tls_cert_path: "/opt/cortex/pki/server.crt"
tls_key_path: "/opt/cortex/pki/server.key"
tls_ca_path: "/opt/cortex/pki/ca.crt"
tls_insecure_skip_verify: false
heartbeat_period: 5s
heartbeat_timeout: 1m0s
instance_id: node1
instance_port: 9005
instance_addr: "192.168.61"
instance_limits:
max_ingestion_rate: 0
max_inflight_push_requests: 0

please help me. Thanks.