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Update SignalR Redis tests to use internal Docker Hub mirror #62936

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Jul 28, 2025
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Update SignalR Redis tests to use internal Docker Hub mirror #62936

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5 changes: 3 additions & 2 deletions src/SignalR/server/StackExchangeRedis/test/Docker.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,8 @@ public class Docker
{
private static readonly string _exeSuffix = OperatingSystem.IsWindows() ? ".exe" : string.Empty;

private static readonly string _dockerContainerName = "redisTestContainer";
private static readonly string _redisImageName = "dotnetdhmirror-f8bzbjakh8cga6ab.azurecr.io/library/redis:7.4";
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Copilot AI Jul 25, 2025

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The hardcoded Azure Container Registry URL makes the code less maintainable. Consider extracting this to a configuration value or environment variable to allow easier updates when the registry URL changes.

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private static readonly string _redisImageName = "dotnetdhmirror-f8bzbjakh8cga6ab.azurecr.io/library/redis:7.4";
private static readonly string _redisImageName = Environment.GetEnvironmentVariable("REDIS_IMAGE_NAME")
?? "dotnetdhmirror-f8bzbjakh8cga6ab.azurecr.io/library/redis:7.4";

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I don't think we need this, this is a good suggestion though

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maybe also extract the ACR host URL into a separate property

private static readonly string _dockerContainerName = "redisTestContainer74";
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Copilot AI Jul 25, 2025

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The container name hardcodes the Redis version '74' which will need manual updates when the Redis version changes. Consider deriving the container name from the image version or using a more generic naming approach.

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private static readonly string _dockerContainerName = "redisTestContainer74";
private static readonly string _redisVersion = _redisImageName.Split(':')[1]; // Extract version from image name
private static readonly string _dockerContainerName = $"redisTestContainer{_redisVersion.Replace('.', '_')}"; // Replace '.' with '_' for valid container name

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I don't think this is worth the complexity

private static readonly string _dockerMonitorContainerName = _dockerContainerName + "Monitor";
private static readonly Lazy<Docker> _instance = new Lazy<Docker>(Create);

Expand Down Expand Up @@ -112,7 +113,7 @@ void Run()
// use static name 'redisTestContainer' so if the container doesn't get removed we don't keep adding more
// use redis base docker image
// 30 second timeout to allow redis image to be downloaded, should be a rare occurrence, only happening when a new version is released
RunProcessAndThrowIfFailed(_path, $"run --rm -p 6379:6379 --name {_dockerContainerName} -d redis", "redis", logger, TimeSpan.FromMinutes(1));
RunProcessAndThrowIfFailed(_path, $"run --rm -p 6379:6379 --name {_dockerContainerName} -d {_redisImageName}", "redis", logger, TimeSpan.FromMinutes(1));
}
}

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