InfluxDB之配置修改

influxdb安装完毕之后，一般来讲，有些配置有必要改一下的，比如默认的端口号，默认的数据存储位置，本篇将介绍下常用配置的修改姿势

I. 配置

系统环境为centos，influxdb的版本为1.6

1. 配置文件

默认配置文件安装目录为: /etc/influxdb/influxdb.conf

默认配置查看

infuxd config

输出结果如

Merging with configuration at: /etc/influxdb/influxdb.conf
reporting-disabled = false
bind-address = "127.0.0.1:8088"

[meta]
  dir = "/var/lib/influxdb/meta"
  retention-autocreate = true
  logging-enabled = true

[data]
  dir = "/var/lib/influxdb/data"
  index-version = "inmem"
  wal-dir = "/var/lib/influxdb/wal"
  wal-fsync-delay = "0s"
  validate-keys = false
  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"
  compact-throughput = 50331648
  compact-throughput-burst = 50331648
  max-series-per-database = 1000000
  max-values-per-tag = 100000
  max-concurrent-compactions = 0
  max-index-log-file-size = 1048576
  series-id-set-cache-size = 100
  trace-logging-enabled = false
  tsm-use-madv-willneed = 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"

[monitor]
  store-enabled = true
  store-database = "_internal"
  store-interval = "10s"

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

[http]
  enabled = true
  bind-address = ":8086"
  auth-enabled = true
  log-enabled = true
  suppress-write-log = false
  write-tracing = false
  flux-enabled = false
  flux-log-enabled = false
  pprof-enabled = true
  debug-pprof-enabled = false
  https-enabled = false
  https-certificate = "/etc/ssl/influxdb.pem"
  https-private-key = ""
  max-row-limit = 0
  max-connection-limit = 0
  shared-secret = ""
  realm = "InfluxDB"
  unix-socket-enabled = false
  unix-socket-permissions = "0777"
  bind-socket = "/var/run/influxdb.sock"
  max-body-size = 25000000
  access-log-path = ""
  max-concurrent-write-limit = 0
  max-enqueued-write-limit = 0
  enqueued-write-timeout = 30000000000

[logging]
  format = "auto"
  level = "info"
  suppress-logo = false

[[graphite]]
  enabled = false
  bind-address = ":2003"
  database = "graphite"
  retention-policy = ""
  protocol = "tcp"
  batch-size = 5000
  batch-pending = 10
  batch-timeout = "1s"
  consistency-level = "one"
  separator = "."
  udp-read-buffer = 0

[[collectd]]
  enabled = false
  bind-address = ":25826"
  database = "collectd"
  retention-policy = ""
  batch-size = 5000
  batch-pending = 10
  batch-timeout = "10s"
  read-buffer = 0
  typesdb = "/usr/share/collectd/types.db"
  security-level = "none"
  auth-file = "/etc/collectd/auth_file"
  parse-multivalue-plugin = "split"

[[opentsdb]]
  enabled = false
  bind-address = ":4242"
  database = "opentsdb"
  retention-policy = ""
  consistency-level = "one"
  tls-enabled = false
  certificate = "/etc/ssl/influxdb.pem"
  batch-size = 1000
  batch-pending = 5
  batch-timeout = "1s"
  log-point-errors = true

[[udp]]
  enabled = false
  bind-address = ":8089"
  database = "udp"
  retention-policy = ""
  batch-size = 5000
  batch-pending = 10
  read-buffer = 0
  batch-timeout = "1s"
  precision = ""

[continuous_queries]
  log-enabled = true
  enabled = true
  query-stats-enabled = false
  run-interval = "1s"

[tls]
  min-version = ""
  max-version = ""

2. 数据存储修改

从上面的配置中可以知道，默认的数据存储为/var/lib/influxdb/data， /var/lib/influxdb/wal, /var/lib/influxdb/meta

将数据保存在我们挂载的硬盘 /influx

第一步，修改配置文件

vim /etc/influxdb/influxdb.conf

## 修改配置
[meta]
  dir = '/influx/meta'
  
[data]
  dir = '/influx/data'
  war-dir = '/influx/wal'

第二步，修改用户组

重新制定存储目录之后，需要修改文件夹的owner和分组，否则influxdb将无法正常启动

chown -R influxdb:influxdb /influx

第三步，重启

service influxdb restart

3. 端口修改

可以修改默认的端口号，首先进入配置文件

[[udp]]
  bind-address = ":18089"

[[http]]
  bind-address = ":18086"
  # 开启下权限验证，相关配置可以参考博文: https://blog.hhui.top/hexblog/2019/05/05/190505-InfluxDB之权限管理/ 
  auth-enabled = true