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Terraform101 English Terraform Middleware config Go Private Kubernetes pkslow Test HTTPS Redis Docker Mac Plan Stream MongoDB Spring DevOps JVM String Map Set List Performance Email Springboot JavaCollections ArrayList Java

通过Terraform创建GCP Pubsub

Created on: 2021-11-13 | Category: Cloud | 0 | View: 173

1 简介

Terraform是管理许多平台的基础设施的工具,如AWS、GCP和Azure。这篇文章将讲解如何通过Terraform来管理GCP Pub/Sub。

创建GCP项目请参考:初始化一个GCP项目并用gcloud访问操作

2 Terraform创建Pub/Sub

2.1 下载Terraform插件

我们需要安装GCP的Terraform插件来管理GCP资源:

# 设置插件目录
$ export TERRAFORM_PLUGIN=/Users/larry/Software/terraform/plugins
# 创建目录
$ mkdir -p ${TERRAFORM_PLUGIN}/registry.terraform.io/hashicorp/google/4.0.0/darwin_amd64
$ cd ${TERRAFORM_PLUGIN}/registry.terraform.io/hashicorp/google/4.0.0/darwin_amd64
# 下载
$ wget https://releases.hashicorp.com/terraform-provider-google/4.0.0/terraform-provider-google_4.0.0_darwin_amd64.zip
# 解压
$ unzip terraform-provider-google_4.0.0_darwin_amd64.zip

2.2 准备Terraform代码

需要提供Terraform代码理管理Pub/Sub,更多细节请参考: Terrafrom GCP.

版本文件version.tf:

terraform {
  required_version = "= 1.0.11"
  required_providers {

    google = {
      source  = "hashicorp/google"
      version = "= 4.0.0"
    }
  }
}

主文件main.tf:

provider "google" {
  project     = "pkslow"
}

resource "google_pubsub_topic" "pkslow-poc" {
  name = "pkslow-poc"
}

resource "google_pubsub_subscription" "pkslow-poc" {
  name  = "pkslow-poc"
  topic = google_pubsub_topic.pkslow-poc.name

  labels = {
    foo = "bar"
  }

  # 20 minutes
  message_retention_duration = "1200s"
  retain_acked_messages      = true

  ack_deadline_seconds = 20

  expiration_policy {
    ttl = "300000.5s"
  }
  retry_policy {
    minimum_backoff = "10s"
  }

  enable_message_ordering    = true
}

2.3 初始化和变更

指定插件目录初始化:

$ terraform init -plugin-dir=${TERRAFORM_PLUGIN}

使变更生效,就会在GCP上创建对应的资源:

$ terraform apply -auto-approve

如果没有发生错误,则意味着创建成功,我们检查一下:

$ gcloud pubsub topics list
---
name: projects/pkslow/topics/pkslow-poc

$ gcloud pubsub subscriptions list
---
ackDeadlineSeconds: 20
enableMessageOrdering: true
expirationPolicy:
  ttl: 300000.500s
labels:
  foo: bar
messageRetentionDuration: 1200s
name: projects/pkslow/subscriptions/pkslow-poc
pushConfig: {}
retainAckedMessages: true
retryPolicy:
  maximumBackoff: 600s
  minimumBackoff: 10s
topic: projects/pkslow/topics/pkslow-poc

注意:我们并没有提供任何密码或密钥,那Terraform怎么可以直接操作我的GCP资源呢?因为它会根据环境变量GOOGLE_APPLICATION_CREDENTIALS来获取。

3 发送和接收消息

我们通过gcloud来发送消息到Pub/Sub上:

$ gcloud pubsub topics publish pkslow-poc --message="www.pkslow.com"
messageIds:
- '3491736520339885'

$ gcloud pubsub topics publish pkslow-poc --message="Larry Deng"
messageIds:
- '3491738650256958'

$ gcloud pubsub topics publish pkslow-poc --message="Hi, pkslower"
messageIds:
- '3491739306095970'

从Pub/Sub拉取消息:

$ gcloud pubsub subscriptions pull pkslow-poc --auto-ack

我们还能在GCP界面上监控对应的队列,十分方便:

4 代码

代码在 GitHub上: https://github.com/LarryDpk/pkslow-samples


Code for all: GitHub

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南瓜慢说

南瓜慢说

多年Java开发,主要专注后端技术:Java/Spring/Springboot/微服务/大数据等。

多读书,多分享;多写作,多整理。

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