如何在terraform中使用locals来重复和合并块？(How to use locals in terraform to repeat and merge blocks?)

编程入门行业动态更新时间:2024-10-20 20:44:09

我有多个docker_container资源：

resource "docker_container" "headerdebug" {
  name  = "headerdebug"
  image = "${docker_image.headerdebug.latest}"

  labels {
    "traefik.frontend.rule" = "Host:debug.in.bb8.fun"
    "traefik.port" = 8080
    "traefik.enable" = "true"
    "traefik.frontend.passHostHeader" = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect" = "true"
    "traefik.frontend.headers.STSSeconds" = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains" = "false"
    "traefik.frontend.headers.customResponseHeaders" = "${var.xpoweredby}"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
  }
}
 
 还有一个：  
resource "docker_container" "cadvisor" {
  name  = "cadvisor"
  image = "${docker_image.cadvisor.latest}"

  labels {
    "traefik.frontend.rule" = "Host:cadvisor.bb8.fun"
    "traefik.port" = 8080
    "traefik.enable" = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect" = "true"
    "traefik.frontend.headers.STSSeconds" = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains" = "false"
    "traefik.frontend.headers.contentTypeNosniff" = "true"
    "traefik.frontend.headers.browserXSSFilter" = "true"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
    "traefik.frontend.headers.customResponseHeaders" = "${var.xpoweredby}"
  }
}
 
 我正在尝试使用locals重新使用两个容器之间的公共标签。 我有以下本地定义：  
locals {
  traefik_common_labels {
    "traefik.frontend.passHostHeader" = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect" = "true"
    "traefik.frontend.headers.STSSeconds" = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains" = "false"
    "traefik.frontend.headers.customResponseHeaders" = "${var.xpoweredby}"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
  }
}
 
 但是文档没有提到如何使用locals来合并整个块，只有地图。  
 我尝试过以下方法：  
labels "${merge(
    local.traefik_common_labels,
    map(
      "traefik.frontend.rule", "Host:debug.in.bb8.fun",
      "traefik.port", 8080,
      "traefik.enable", "true",
    )
  )}"
 
 这给出了以下错误：  
 tf11计划  
Error: Failed to load root config module: Error loading modules: module docker: Error parsing .terraform/modules/2f3785083ce0d0ac2dd3346cf129e795/main.tf: key 'labels "${merge(
    local.traefik_common_labels,
    map(
      "traefik.frontend.rule", "Host:debug.in.bb8.fun",
      "traefik.port", 8080,
      "traefik.enable", "true",
    )
  )}"' expected start of object ('{') or assignment ('=')
 
 我对此PR的尝试有很多不同： https ： //git.captnemo.in/nemo/nebula/pulls/4/files 
I have multiple docker_container resources: 
resource "docker_container" "headerdebug" {
  name  = "headerdebug"
  image = "${docker_image.headerdebug.latest}"

  labels {
    "traefik.frontend.rule" = "Host:debug.in.bb8.fun"
    "traefik.port" = 8080
    "traefik.enable" = "true"
    "traefik.frontend.passHostHeader" = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect" = "true"
    "traefik.frontend.headers.STSSeconds" = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains" = "false"
    "traefik.frontend.headers.customResponseHeaders" = "${var.xpoweredby}"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
  }
}
 
And another one: 
resource "docker_container" "cadvisor" {
  name  = "cadvisor"
  image = "${docker_image.cadvisor.latest}"

  labels {
    "traefik.frontend.rule" = "Host:cadvisor.bb8.fun"
    "traefik.port" = 8080
    "traefik.enable" = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect" = "true"
    "traefik.frontend.headers.STSSeconds" = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains" = "false"
    "traefik.frontend.headers.contentTypeNosniff" = "true"
    "traefik.frontend.headers.browserXSSFilter" = "true"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
    "traefik.frontend.headers.customResponseHeaders" = "${var.xpoweredby}"
  }
}
 
I'm trying to use locals to re-use the common labels between both the containers. I have the following local defined: 
locals {
  traefik_common_labels {
    "traefik.frontend.passHostHeader" = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect" = "true"
    "traefik.frontend.headers.STSSeconds" = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains" = "false"
    "traefik.frontend.headers.customResponseHeaders" = "${var.xpoweredby}"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
  }
}
 
But the documentation doesn't mention how to use locals for merging entire blocks, only maps. 
I've tried the following: 
labels "${merge(
    local.traefik_common_labels,
    map(
      "traefik.frontend.rule", "Host:debug.in.bb8.fun",
      "traefik.port", 8080,
      "traefik.enable", "true",
    )
  )}"
 
which gives the following error: 
tf11 plan 
Error: Failed to load root config module: Error loading modules: module docker: Error parsing .terraform/modules/2f3785083ce0d0ac2dd3346cf129e795/main.tf: key 'labels "${merge(
    local.traefik_common_labels,
    map(
      "traefik.frontend.rule", "Host:debug.in.bb8.fun",
      "traefik.port", 8080,
      "traefik.enable", "true",
    )
  )}"' expected start of object ('{') or assignment ('=')
 
There is a pretty diff of my attempts at this PR: https://git.captnemo.in/nemo/nebula/pulls/4/files
                最满意答案
                
                    
                         您需要将值分配给labels ，如此  
locals {
  traefik_common_labels {
    "traefik.frontend.passHostHeader"                  = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect"    = "true"
    "traefik.frontend.headers.STSSeconds"              = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains"    = "false"
    "traefik.frontend.headers.customResponseHeaders"   = "${var.xpoweredby}"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
  }
}

resource "docker_container" "cadvisor" {
  name  = "cadvisor"
  image = "${docker_image.cadvisor.latest}"

  labels = "${merge(
    local.traefik_common_labels,
    map(
      "traefik.frontend.rule", "Host:debug.in.bb8.fun",
      "traefik.port", 8080,
      "traefik.enable", "true",
    ))}"
}
You need to assign the value to labels like so 
locals {
  traefik_common_labels {
    "traefik.frontend.passHostHeader"                  = "true"
    "traefik.frontend.headers.SSLTemporaryRedirect"    = "true"
    "traefik.frontend.headers.STSSeconds"              = "2592000"
    "traefik.frontend.headers.STSIncludeSubdomains"    = "false"
    "traefik.frontend.headers.customResponseHeaders"   = "${var.xpoweredby}"
    "traefik.frontend.headers.customFrameOptionsValue" = "${var.xfo_allow}"
  }
}

resource "docker_container" "cadvisor" {
  name  = "cadvisor"
  image = "${docker_image.cadvisor.latest}"

  labels = "${merge(
    local.traefik_common_labels,
    map(
      "traefik.frontend.rule", "Host:debug.in.bb8.fun",
      "traefik.port", 8080,
      "traefik.enable", "true",
    ))}"
}