kinaba 安装踩坑： FATAL Error: [elasticsearch.url]: definition for this key is missing

操作系统：Linux

kibana 版本： 7.4.0

1. 在/etc/yum.repos.d/ 下新建 kibana.repo  配置 yum 源地址 内容如下：

[root@localhost yum.repos.d]# cat kibana.repo
[kibana-.x]
name=Kibana repository for .x packages
baseurl=https://artifacts.elastic.co/packages/7.x/yum
gpgcheck=
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=
autorefresh=
type=rpm-md

2. 安装 kibana

sudo yum install kibana

3. 安装完成之后，kibana 的相关目录如下所示：

4. 修改配置文件 ，主要是添加 elasticsearch 的信息：

server.port:
server.host: "127.0.0.1"
server.name: "tanklog"
elasticsearch.url: "http://127.0.0.1:9200"

5. 启动 kibana （由于 root 用户不能直接启动 kibana，可以新建一个用户专门用来管理 kibana，或者在启动命令后追加 --allow-root）

/usr/share/kibana/bin/kibana --allow-root

6. 然后会报错如下：

FATAL  Error: [elasticsearch.url]: definition for this key is missing

7. 经过一波操作之后，发现需要将 url 换成 hosts，配置文件需要设置为如下所示：

需要用： elasticsearch.hosts， 而不是： elasticsearch.url

server.port:
server.host: "127.0.0.1"
server.name: tanklog
elasticsearch.hosts: ["http://localhost:9200/"]
# elasticsearch.url: "http://localhost:9200"

8. kibana 本身没问题，启动成功时会出现如下日志：

[root@localhost kibana]#  /usr/share/kibana/bin/kibana --allow-root
  log   [::50.254] [info][plugins-system] Setting up [] plugins: [security,translations,inspector,data]
  log   [::50.263] [info][plugins][security] Setting up plugin
  log   [::50.266] [warning][config][plugins][security] Generating a random key for xpack.security.encryptionKey. To prevent sessions from being invalidated on restart, please set xpack.security.encryptionKey in kibana.yml
  log   [::50.266] [warning][config][plugins][security] Session cookies will be transmitted over insecure connections. This is not recommended.
  log   [::50.325] [info][plugins][translations] Setting up plugin
  log   [::50.326] [info][data][plugins] Setting up plugin
  log   [::50.328] [info][plugins-system] Starting [] plugins: [security,translations,data]
  log   [::15.769] [warning][plugin] Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/metric_vis
  log   [::15.832] [warning][plugin] Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/table_vis
  log   [::15.833] [warning][plugin] Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/tagcloud
  log   [::15.910] [warning][plugin] Skipping non-plugin directory at /usr/share/kibana/src/legacy/core_plugins/vega
  log   [::17.487] [info][status][plugin:kibana@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.494] [info][status][plugin:elasticsearch@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.496] [info][status][plugin:xpack_main@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.508] [info][status][plugin:telemetry@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.511] [info][status][plugin:graph@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.525] [info][status][plugin:monitoring@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.529] [info][status][plugin:spaces@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.563] [info][status][plugin:security@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.565] [info][status][plugin:searchprofiler@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.568] [info][status][plugin:ml@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.635] [info][status][plugin:tilemap@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.638] [info][status][plugin:watcher@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.654] [info][status][plugin:grokdebugger@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.660] [info][status][plugin:dashboard_mode@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.662] [info][status][plugin:logstash@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.670] [info][status][plugin:beats_management@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.689] [info][status][plugin:apm_oss@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.727] [info][status][plugin:apm@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.729] [info][status][plugin:code@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.731] [info][status][plugin:data@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.733] [info][status][plugin:visualizations@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.740] [info][status][plugin:interpreter@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.742] [info][status][plugin:tile_map@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.746] [info][status][plugin:task_manager@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.751] [info][status][plugin:maps@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.770] [info][status][plugin:canvas@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.776] [info][status][plugin:license_management@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.779] [info][status][plugin:cloud@7.4.] Status changed from uninitialized to green - Ready
  log   [::17.781] [info][status][plugin:index_management@7.4.] Status changed from uninitialized to yellow - Waiting for Elasticsearch
  log   [::17.799] [info][status][plugin:console@7.4.] Status changed from uninitialized to green - Ready

9. 由于我的 elasticsearch 版本是7.3.2， 与 kibana 版本不一致，所以启动过程中出现了 error, 需要升级 elasticsearch 版本为 7.4.0

g   [::18.088] [info][status][plugin:table_vis@7.4.] Status changed from uninitialized to green - Ready
  log   [::18.090] [info][status][plugin:tagcloud@7.4.] Status changed from uninitialized to green - Ready
  log   [::18.092] [info][status][plugin:vega@7.4.] Status changed from uninitialized to green - Ready
  log   [::18.096] [warning][browser-driver][reporting] Enabling the Chromium sandbox provides an additional layer of protection.
  log   [::19.041] [error][status][plugin:xpack_main@7.4.] Status changed from yellow to red - This version of Kibana requires Elasticsearch v7.4.0 on all nodes. I found the following incompatible nodes in your cluster: v7.3.2 @ 192.168.1.27: (192.168.1.27)
  log   [::19.042] [error][status][plugin:graph@7.4.] Status changed from yellow to red - This version of Kibana requires Elasticsearch v7.4.0 on all nodes. I found the following incompatible nodes in your cluster: v7.3.2 @ 192.168.1.27: (192.168.1.27)

升级 elasticsearch 版本

sudo yum -y install elasticsearch-oss

10. 启动 kibana，查看日志信息，发现有很多 warn

[warning][config][plugins][security] Generating a random key for xpack.security.encryptionKey. To prevent sessions from being invalidated on restart, please set xpack.security.encryptionKey in kibana.yml

根据 warn 提示，在 kibana.yml 里面添加缺失的属性内容

xpack.reporting.encryptionKey: "a_random_string"
xpack.security.encryptionKey: "something_at_least_32_characters"

启动 kibana，且将启动日志收集到指定文件

/usr/share/kibana/bin/kibana --allow-root > /var/lib/kibana/kibana.log &

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