如何在Ubuntu上部署InfluxDB集群

在Ubuntu上部署InfluxDB集群需要以下几个步骤：

1. 安装InfluxDB

首先，在每个节点上安装InfluxDB。可以使用以下命令来添加InfluxDB的存储库并安装软件包：

wget -qO- https://repos.influxdata.com/influxdb.key | sudo apt-key add -
source /etc/lsb-release
echo "deb https://repos.influxdata.com/${DISTRIB_ID,,} ${DISTRIB_CODENAME} stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
sudo apt-get update && sudo apt-get install influxdb

2. 配置InfluxDB

在每个节点上，编辑/etc/influxdb/influxdb.conf文件，以配置数据和元数据存储、HTTP API绑定地址、端口等。例如：

[meta]
  dir = "/var/lib/influxdb/meta"
  bind-address = "0.0.0.0:8088"
  retention-autocreate = true
  logging-enabled = true

[data]
  dir = "/var/lib/influxdb/data"
  wal-dir = "/var/lib/influxdb/wal"
  query-log-enabled = true
  cache-max-memory-size = 1073741824
  cache-snapshot-memory-size = 26214400
  cache-snapshot-write-cold-duration = "10m0s"
  compact-full-write-cold-duration = "4h0m0s"
  max-series-per-database = 1000000
  max-values-per-tag = 100000
  max-concurrent-compactions = 0
  trace-logging-enabled = false

[coordinator]
  write-timeout = "10s"
  max-concurrent-queries = 0
  query-timeout = "0s"
  log-queries-after = "0s"
  max-select-point = 0
  max-select-series = 0
  max-select-buckets = 0

[retention]
  enabled = true
  check-interval = "30m0s"

[shard-precreation]
  enabled = true
  check-interval = "10m0s"
  advance-period = "30m0s"

[admin]
  enabled = false
  bind-address = ":8083"
  https-enabled = false
  https-certificate = "/etc/ssl/influxdb.pem"

[http]
  enabled = true
  bind-address = ":8086"
  auth-enabled = false
  log-enabled = true
  write-tracing = false
  pprof-enabled = false
  https-enabled = false
  https-certificate = "/etc/ssl/influxdb.pem"
  https-private-key = ""
  max-row-limit = 10000
  max-connection-limit = 0
  shared-secret = ""
  realm = "InfluxDB"
  unix-socket-enabled = false
  bind-socket = "/var/run/influxdb.sock"

[subscriber]
  enabled = true
  http-timeout = "30s"
  insecure-skip-verify = false
  ca-certs = ""
  write-concurrency = 40
  write-buffer-size = 1000

3. 配置集群

在每个数据节点上，编辑/etc/influxdb/influxdb.conf文件，添加[cluster]部分以配置集群通信。例如：

[cluster]
  dial-timeout = "1s"
  shard-writer-timeout = "5s"
  shard-reader-timeout = "0"
  max-remote-write-connections = 10
  cluster-tracing = false

在每个元数据节点上，编辑/etc/influxdb/influxdb.conf文件，添加[enterprise]部分以配置企业许可证和注册信息（如果有）。例如：

[enterprise]
  registration-enabled = false
  registration-server-url = ""
  license-key = ""
  license-path = ""

4. 启动InfluxDB

在每个节点上，使用以下命令启动InfluxDB服务：

sudo systemctl start influxdb

5. 初始化集群

在一个元数据节点上，使用以下命令初始化集群：

influxd-ctl init

这将输出一个示例命令，用于将其他数据节点添加到集群中。例如：

influxd-ctl join <data-node-1-ip>:8088

6. 添加数据节点

在其他数据节点上，运行上一步中生成的join命令，将它们添加到集群中。

7. 验证集群状态

在任何元数据节点上，使用以下命令查看集群状态：

influxd-ctl show

这将显示集群中所有节点的状态。如果一切正常，您现在应该已经成功部署了一个InfluxDB集群。