add configurable parameter for etcd_auto_compaction_retention

inventory/group_vars/all.yml

@@ -98,3 +98,6 @@ bin_dir: /usr/local/bin
 
 ## Please specify true if you want to perform a kernel upgrade
 kernel_upgrade: false
+
+## Etcd auto compaction retention for mvcc key value store in hour
+#etcd_compaction_retention: 0

roles/etcd/defaults/main.yml

@@ -22,3 +22,5 @@ etcd_memory_limit: 512M
 #etcd_cpu_limit: 300m
 
 etcd_node_cert_hosts: "{{ groups['k8s-cluster'] | union(groups.get('calico-rr', [])) }}"
+
+etcd_compaction_retention: "0"

roles/etcd/templates/etcd.env.yml

@@ -11,6 +11,7 @@ ETCD_LISTEN_PEER_URLS=https://{{ etcd_address }}:2380
 ETCD_NAME={{ etcd_member_name }}
 ETCD_PROXY=off
 ETCD_INITIAL_CLUSTER={{ etcd_peer_addresses }}
+ETCD_AUTO_COMPACTION_RETENTION={{ etcd_compaction_retention }}
 
 # TLS settings
 ETCD_TRUSTED_CA_FILE={{ etcd_cert_dir }}/ca.pem