1, Introduction

In all the cases I mentioned before, the whole Azure Resource is deployed to the same subscription, and the environment to be deployed is not flexibly selected before the operation of Azure Pipeline. In the actual project development, we will also encounter that these infrastructure resources are deployed to DEV,UAT,PRD and other environments after verification. So let's start today's analysis with the whole problem.

--------------------I am the dividing line--------------------

--------------------Azure terrain series--------------------

1. Introduction to azure terrain (I)

2. Detailed explanation of azure terrain (II) syntax

3. Azure Terraform (III) deploying Web applications

4. Azure terrain (IV) status file storage

5. Azure terrain (V) realize automatic deployment of basic resources by using Azure DevOps

6. Azure terrain (VI) Common Module

7. Azure terrain (VII) realize automatic deployment of basic resources by using Azure DevOps (supplementary)

8. Azure Terraform (VIII) uses Azure DevOps to realize Infra resources and NET CORE Web application continuous integration and deployment

9. Azure terrain (IX) uses the approval of Azure DevOps Pipeline to control the process release

10. Azure terrain (x) uses the conditional statements of Azure DevOps to select the publishing environment

2, Text

1. Conditional statements in Azure DevOps Pipeline

First, we need to define parameters to select which environment to use when Pipeline is running

parameters:
  - name: deployEnv
    displayName: Select a Deployment Environment???
    type: string
    default: 'dev'
    values:
    - dev
    - uat
    - prd

Next, the value of the variable setting the conditional statement can change according to the value of "deployEnv"

variables:
  - name: tf_version
    value: 'latest'
  - name: env_name
    ${{ if eq(parameters['deployEnv'],'dev') }}:
      value: 'dev'
    ${{elseif eq(parameters['DeployEnv'],'uat') }}:
      value: 'uat'
    ${{elseif eq(parameters['DeployEnv'],'prd') }}:
      value: 'prd'

The above two sections of code are not difficult for us to see, veriables env_ The value of name depends on parameters The value of deployenv is filtered by conditional statements and re assigned

Copy the above two pieces of code to azure pipelines In YML

azure-pipeline.yml complete code

  1 # Starter pipeline
  2 # Start with a minimal pipeline that you can customize to build and deploy your code.
  3 # Add steps that build, run tests, deploy, and more:
  4 # https://aka.ms/yaml
  5 
  6 trigger:
  7 - remote_stats
  8 
  9 pool:
 10   vmImage: ubuntu-latest
 11 
 12 parameters:
 13   - name: deployEnv
 14     displayName: Selecting a Deployment Environment???
 15     type: string
 16     default: 'dev'
 17     values:
 18     - dev
 19     - uat
 20     - prd
 21   
 22 variables:
 23   - name: tf_version
 24     value: 'latest'
 25   - name: env_name
 26     ${{ if eq(parameters['deployEnv'],'dev') }}:
 27       value: 'dev'
 28     ${{elseif eq(parameters['DeployEnv'],'uat') }}:
 29       value: 'uat'
 30     ${{elseif eq(parameters['DeployEnv'],'prd') }}:
 31       value: 'prd'
 32 
 33 stages:
 34 - stage: script
 35   jobs:
 36    - job: azure_cli_script
 37      steps: 
 38       - task: AzureCLI@2
 39         displayName: 'Azure CLI :Create Storage Account，Key Vault And Set KeyVault Secret'
 40         inputs:
 41           azureSubscription: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
 42           scriptType: 'bash'
 43           scriptLocation: 'inlineScript'
 44           inlineScript: |
 45               # create azure resource group
 46               az group create --location eastasia --name $(terraform_rg)
 47       
 48               # create azure storage account
 49               az storage account create --name $(storage_account) --resource-group $(terraform_rg) --location eastasia --sku Standard_LRS
 50       
 51               # create storage account container for tf state 
 52               az storage container create --name $(storage_account_container) --account-name $(storage_account)
 53       
 54               # query storage key and set variable
 55               ACCOUNT_KEY=$(az storage account keys list --resource-group $(terraform_rg) --account-name $(storage_account) --query "[?keyName == 'key1'][value]" --output tsv)
 56       
 57               # create azure keyvault
 58               az keyvault create --name $(keyvault) --resource-group $(terraform_rg) --location eastasia --enable-soft-delete false
 59       
 60               # set keyvault secret,secret value is ACCOUNT_KEY
 61               az keyvault secret set --name $(keyvault_sc) --vault-name $(keyvault)  --value $ACCOUNT_KEY
 62        
 63       - task: AzureKeyVault@2
 64         displayName: 'Azure Key Vault :Get Storage Access Secret'
 65         inputs:
 66           azureSubscription: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
 67           KeyVaultName: '$(keyvault)'
 68           SecretsFilter: 'terraform-stste-storage-key'
 69           RunAsPreJob: false
 70 
 71 - stage: terraform_validate
 72   jobs:
 73   - job: terraform_validate
 74     steps:
 75     - task: TerraformInstaller@0
 76       inputs:
 77         terraformVersion: ${{variables.tf_version}}
 78     - task: TerraformTaskV2@2
 79       displayName: 'terraform init'
 80       inputs:
 81         provider: 'azurerm'
 82         command: 'init'
 83         # commandOptions: '-backend-config="access_key=$(terraform-stste-storage-key)"'
 84         backendServiceArm: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
 85         backendAzureRmResourceGroupName: $(terraform_rg)
 86         backendAzureRmStorageAccountName: $(storage_account)
 87         backendAzureRmContainerName: $(storage_account_container)
 88         backendAzureRmKey: $(container_key)
 89         workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
 90     - task: TerraformTaskV2@2
 91       inputs:
 92         provider: 'azurerm'
 93         command: 'validate'
 94         workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
 95 
 96 - stage: terraform_plan
 97   dependsOn: [terraform_validate]
 98   condition: succeeded('terraform_validate')
 99   jobs:
100     - job: terraform_plan
101       steps:
102         - task: TerraformInstaller@0
103           inputs:
104             terraformVersion: ${{ variables.tf_version }}
105         - task: TerraformTaskV2@2
106           displayName: 'terraform init'
107           inputs:
108             provider: 'azurerm'
109             command: 'init'
110             # commandOptions: '-backend-config="access_key=$(terraform-stste-storage-key)"'
111             backendServiceArm: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
112             backendAzureRmResourceGroupName: $(terraform_rg)
113             backendAzureRmStorageAccountName: $(storage_account)
114             backendAzureRmContainerName: $(storage_account_container)
115             backendAzureRmKey: $(container_key)
116             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
117         - task: TerraformTaskV2@2
118           inputs:
119             provider: 'azurerm'
120             command: 'plan'
121             environmentServiceNameAzureRM: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
122             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
123 
124 - stage: terraform_apply
125   dependsOn: [terraform_plan]
126   condition: succeeded('terraform_plan')
127   jobs:
128     - deployment: terraform_apply
129       continueOnError: false
130       environment: 'Approve_Production'
131       timeoutInMinutes: 120
132       strategy:
133        runOnce:
134         deploy:
135           steps:
136             - checkout: self
137             - task: TerraformInstaller@0
138               inputs:
139                 terraformVersion: ${{ variables.tf_version }}
140             - task: TerraformTaskV2@2
141               displayName: 'terraform init'
142               inputs:
143                 provider: 'azurerm'
144                 command: 'init'
145                 # commandOptions: '-backend-config="access_key=$(terraform-stste-storage-key)"'
146                 backendServiceArm: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
147                 backendAzureRmResourceGroupName: $(terraform_rg)
148                 backendAzureRmStorageAccountName: $(storage_account)
149                 backendAzureRmContainerName: $(storage_account_container)
150                 backendAzureRmKey: $(container_key)
151                 workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
152             - task: TerraformTaskV2@2
153               inputs:
154                 provider: 'azurerm'
155                 command: 'plan'
156                 environmentServiceNameAzureRM: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
157                 workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
158             - task: TerraformTaskV2@2
159               inputs:
160                 provider: 'azurerm'
161                 command: 'apply'
162                 commandOptions: '-auto-approve'
163                 environmentServiceNameAzureRM: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
164                 workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
165 
166 # - stage: terraform_apply
167 #   dependsOn: [terraform_plan]
168 #   condition: succeeded('terraform_plan')
169 #   jobs:
170 #     - job: terraform_apply
171 #       steps:
172 #         - task: TerraformInstaller@0
173 #           inputs:
174 #             terraformVersion: ${{ variables.tf_version }}
175 #         - task: TerraformTaskV2@2
176 #           displayName: 'terraform init'
177 #           inputs:
178 #             provider: 'azurerm'
179 #             command: 'init'
180 #             # commandOptions: '-backend-config="access_key=$(terraform-stste-storage-key)"'
181 #             backendServiceArm: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
182 #             backendAzureRmResourceGroupName: $(terraform_rg)
183 #             backendAzureRmStorageAccountName: $(storage_account)
184 #             backendAzureRmContainerName: $(storage_account_container)
185 #             backendAzureRmKey: $(container_key)
186 #             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
187 #         - task: TerraformTaskV2@2
188 #           inputs:
189 #             provider: 'azurerm'
190 #             command: 'plan'
191 #             environmentServiceNameAzureRM: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
192 #             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
193 #         - task: TerraformTaskV2@2
194 #           inputs:
195 #             provider: 'azurerm'
196 #             command: 'apply'
197 #             commandOptions: '-auto-approve'
198 #             environmentServiceNameAzureRM: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
199 #             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
200 
201 - stage: terraform_destroy
202   dependsOn: [terraform_apply]
203   condition: succeeded('terraform_apply')
204   jobs:
205     - job: terraform_destroy
206       steps:
207         - task: TerraformInstaller@0
208           inputs:
209             terraformVersion: ${{ variables.tf_version }}
210         - task: TerraformTaskV2@2
211           displayName: 'terraform init'
212           inputs:
213             provider: 'azurerm'
214             command: 'init'
215             # commandOptions: '-backend-config="access_key=$(terraform-stste-storage-key)"'
216             backendServiceArm: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
217             backendAzureRmResourceGroupName: $(terraform_rg)
218             backendAzureRmStorageAccountName: $(storage_account)
219             backendAzureRmContainerName: $(storage_account_container)
220             backendAzureRmKey: $(container_key)
221             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
222         - task: TerraformTaskV2@2
223           inputs:
224             provider: 'azurerm'
225             command: 'plan'
226             environmentServiceNameAzureRM: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
227             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'
228         - task: TerraformTaskV2@2
229           inputs:
230             provider: 'azurerm'
231             command: 'destroy'
232             commandOptions: '-auto-approve'
233             environmentServiceNameAzureRM: 'Microsoft Azure Subscription(xxxx-xxx-xxx-xxxx)'
234             workingDirectory: '$(System.DefaultWorkingDirectory)/src/model/'

2. Running effect of Azure Pipeline conditional statement

After saving the yml file, click "Run" to manually trigger the Pipeline

You can see that in addition to the default branch of the default Run pipeline, you also need to select our customized parameters - "deployenv"

bingo !! Our goal has been achieved. Through the judgment of this conditional statement, we can replace some deployment variables, so as to achieve the purpose of deploying different environments.

3, End

Let's practice more about the above contents. In the next article, we will continue to introduce the deployment of Azure Pipeline in multiple environments

reference material: Terraform official，Azure Pipeline document

Terraform_Cnbate_Traffic_Manager github Address: https://github.com/yunqian44/Terraform_Cnbate_Traffic_Manager

Welcome to the blogger's blog: https://allenmasters.com/

Author: Allen 

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