问题1、ERROR: [1] bootstrap checks failed
[1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
修改：elasticsearch.yml
取消注释保留一个节点
cluster.initial_master_nodes: ["node-1"]
这里的node-1，是上面的节点名称。
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问题2：shasum command not found
解决方法：
yum install perl-Digest-SHA