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--- g_etcd_hosts: "{{ groups.etcd | default([]) }}" g_lb_hosts: "{{ groups.lb | default([]) }}" g_master_hosts: "{{ groups.masters | default([]) }}" g_node_hosts: "{{ groups.nodes | default([]) }}" g_nfs_hosts: "{{ groups.nfs | default([]) }}" g_all_hosts: "{{ g_master_hosts | union(g_node_hosts) | union(g_etcd_hosts) | union(g_lb_hosts) | default([]) }}"