update some docs

config/elasticsearch.yml

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+# ======================== Elasticsearch Configuration =========================
+#
+# NOTE: Elasticsearch comes with reasonable defaults for most settings.
+#       Before you set out to tweak and tune the configuration, make sure you
+#       understand what are you trying to accomplish and the consequences.
+#
+# The primary way of configuring a node is via this file. This template lists
+# the most important settings you may want to configure for a production cluster.
+#
+# Please consult the documentation for further information on configuration options:
+# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
+#
+# ---------------------------------- Cluster -----------------------------------
+#
+# Use a descriptive name for your cluster:
+#
+# 集群名称-qhdata-elk
+cluster.name: qhdata-elk
+#
+# ------------------------------------ Node ------------------------------------
+#
+# Use a descriptive name for the node:
+#
+node.name: stxz-elk-01
+#
+# Add custom attributes to the node:
+#
+#node.attr.rack: r1
+#
+# ----------------------------------- Paths ------------------------------------
+#
+# Path to directory where to store the data (separate multiple locations by comma):
+#
+path.data: /home/elasticsearch/data
+#
+# Path to log files:
+#
+path.logs: /home/elasticsearch/log
+#
+# ----------------------------------- Memory -----------------------------------
+#
+# Lock the memory on startup:
+#
+#bootstrap.memory_lock: true
+#
+# Make sure that the heap size is set to about half the memory available
+# on the system and that the owner of the process is allowed to use this
+# limit.
+#
+# Elasticsearch performs poorly when the system is swapping the memory.
+#
+# ---------------------------------- Network -----------------------------------
+#
+# By default Elasticsearch is only accessible on localhost. Set a different
+# address here to expose this node on the network:
+#
+network.host: 0.0.0.0
+#
+# By default Elasticsearch listens for HTTP traffic on the first free port it
+# finds starting at 9200. Set a specific HTTP port here:
+#
+http.port: 9200
+#
+# For more information, consult the network module documentation.
+#
+# --------------------------------- Discovery ----------------------------------
+#
+# Pass an initial list of hosts to perform discovery when this node is started:
+# The default list of hosts is ["127.0.0.1", "[::1]"]
+#
+# 集群自动发现
+discovery.seed_hosts: ["stxz-elk-01", "stxz-elk-02","stxz-elk-03"]
+#
+# Bootstrap the cluster using an initial set of master-eligible nodes:
+#
+cluster.initial_master_nodes: ["stxz-elk-01"]
+#
+# For more information, consult the discovery and cluster formation module documentation.
+#
+# ---------------------------------- Various -----------------------------------
+#
+# Require explicit names when deleting indices:
+#
+#action.destructive_requires_name: true
+#
+
+# 集群认证配置
+xpack.security.enabled: true
+xpack.license.self_generated.type: basic
+xpack.security.transport.ssl.enabled: true
+xpack.security.transport.ssl.verification_mode: certificate
+xpack.security.transport.ssl.keystore.path: elastic-certificates.p12
+xpack.security.transport.ssl.truststore.path: elastic-certificates.p12