Thank you for the comments, I must think some time how to handle this.
My intention has been to generate 2 random strings in an Azure pipeline,
save them as secrets in an Azure Key Vault (so that our C# ASP.Net app can
fetch them when starting up in Kubernetes) and also pass them to the
pipeline tasks, which would pass them as the build arg to the "docker
build" command:
# Generate random passwords as save them as KV secrets
- task: AzurePowerShell@5
displayName: 'Write PostgreSQL passwords to KV'
inputs:
azureSubscription: '${{ parameters.ArmConnection }}'
ScriptType: 'InlineScript'
azurePowerShellVersion: 'LatestVersion'
Inline: |
# Generate a random password for PUSH_PULL_PASS and store it in the KV
$pushPullPass = ( -join ((0x30..0x39) + (0x41..0x5A) + (0x61..0x7A) |
Get-Random -Count 20 | % {[char]$_}) )
$pushPullSecret = ConvertTo-SecureString -String $pushPullPass
-AsPlainText -Force
Set-AzKeyVaultSecret -VaultName '${{ parameters.ResourceKeyVault }}'
-Name PushPullPass -SecretValue $pushPullSecret
# Generate a random password for TIMESHIFT_PASS and store it in the KV
$timeshiftPass = ( -join ((0x30..0x39) + (0x41..0x5A) + (0x61..0x7A)
| Get-Random -Count 20 | % {[char]$_}) )
$timeshiftSecret = ConvertTo-SecureString -String $timeshiftPass
-AsPlainText -Force
Set-AzKeyVaultSecret -VaultName '${{ parameters.ResourceKeyVault }}'
-Name TimeshiftPass -SecretValue $timeshiftSecret
# Set the pipeline vars for the 2 docker builds below
Write-Host "##vso[task.setvariable
variable=PushPullPass]$pushPullPass"
Write-Host "##vso[task.setvariable
variable=TimeshiftPass]$timeshiftPass"
# build Push Pull DB docker file
- task: Docker@2
displayName: Build Push Pull DB docker image
inputs:
command: build
repository: '$(PushPullReponame)'
dockerfile:
'$(Build.SourcesDirectory)/suuCcg/src/Services/SUU.PushPullDatabase/Dockerfile'
arguments: "--no-cache --build-arg PGPASSWORD=$(PushPullPass)"
tags: $(ImageTag)
buildContext: '$(Build.SourcesDirectory)/suuCcg/src/'
# build Timeshift DB docker file
- task: Docker@2
displayName: Build Timeshift DB docker image
inputs:
command: build
repository: '$(TimeshiftReponame)'
dockerfile:
'$(Build.SourcesDirectory)/suuCcg/src/Services/SUU.TimeshiftDatabase/Dockerfile'
arguments: "--no-cache --build-arg PGPASSWORD=$(TimeshiftPass)"
tags: $(ImageTag)
buildContext: '$(Build.SourcesDirectory)/suuCcg/src/'
And then I am not done yet :-) I need to pass that random string from the
Dockerfile to the 01-create-database.sql and I have tried it as env var:
# To build locally: docker build -f
Services/SUU.TimeshiftDatabase/Dockerfile --build-arg
PGPASSWORD=timeshift_pass .
# To run locally in Git Bash: winpty docker run --rm -it -p 5432:5432
sha256:...
FROM postgres:17-alpine3.21
RUN apk update && apk upgrade && apk add --no-cache pg_top
ARG PGPASSWORD
# Tell docker-entrypoint.sh to create superuser "postgres"
# with password passed as build arg and database "postgres"
ENV POSTGRES_PASSWORD=$PGPASSWORD
# Tell docker-entrypoint.sh to change these params in postgresql.conf
ENV POSTGRES_INITDB_ARGS="--set max_connections=200 \
--set shared_buffers=16GB \
--set work_mem=8MB \
--set maintenance_work_mem=128MB \
--set effective_cache_size=8GB \
--set from_collapse_limit=24 \
--set join_collapse_limit=24 \
--set log_min_messages=notice \
--set log_connections=on \
--set log_statement=all \
--set listen_addresses='*'"
ENV PGUSER=postgres
ENV PGPASSWORD=$PGPASSWORD
ENV PGDATABASE=timeshift_database
# The files below are executed by the DB superuser "postgres"
# in alphabetical order after the database has been initialized
WORKDIR /docker-entrypoint-initdb.d
COPY ./Services/SUU.TimeshiftDatabase/01-create-database.sql .
COPY
./Services/SUU.VehicleService/TimeshifCalculator/timeshift-create-tables.sql
./02-create-tables.sql
COPY
./Services/SUU.VehicleService/TimeshifCalculator/timeshift-create-functions.sql
./03-create-functions.sql
COPY
./Services/SUU.VehicleService/TimeshifCalculator/timeshift-smoke-tests.sql
./04-smoke-tests.sql
# Prepend \c timeshift_database to each SQL file using sed
RUN sed -i.bak '1i\\\\c timeshift_database' ./02-create-tables.sql
RUN sed -i.bak '1i\\\\c timeshift_database' ./03-create-functions.sql
RUN sed -i.bak '1i\\\\c timeshift_database' ./04-smoke-tests.sql
# Drop root privileges
USER postgres
But I see that the whole chain is tricky to implement and I'd like to
switch from a postgres:17-alpine3.21 based Docker image to the "Azure
PostgreSQL flexible server" product anyway, to have less maintenance.
Best regards
Alex
