Set console formatter to JSON in ASP.NET Core images (dotnet#2748)

eng/dockerfile-templates/aspnet/6.0/Dockerfile.alpine

@@ -1,9 +1,13 @@
 ARG REPO=mcr.microsoft.com/dotnet/runtime
 FROM $REPO:6.0-{{OS_VERSION}}{{ARCH_TAG_SUFFIX}}
 
-# Install ASP.NET Core
-ENV ASPNET_VERSION={{VARIABLES["aspnet|6.0|build-version"]}}
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION={{VARIABLES["aspnet|6.0|build-version"]}} \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
+# Install ASP.NET Core
 RUN wget -O aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/aspnetcore/Runtime/$ASPNET_VERSION/aspnetcore-runtime-$ASPNET_VERSION-linux-musl-{{ARCH_SHORT}}.tar.gz \
     && aspnetcore_sha512='{{VARIABLES[cat("aspnet|6.0|linux-musl|", ARCH_SHORT, "|sha")]}}' \
     && echo "$aspnetcore_sha512  aspnetcore.tar.gz" | sha512sum -c - \

eng/dockerfile-templates/aspnet/6.0/Dockerfile.linux

@@ -17,6 +17,10 @@ RUN curl -SL --output aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/a
 FROM $REPO:6.0-{{OS_VERSION}}{{ARCH_TAG_SUFFIX}}
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/shared/Microsoft.AspNetCore.App", "/usr/share/dotnet/shared/Microsoft.AspNetCore.App"]

eng/dockerfile-templates/aspnet/6.0/Dockerfile.nanoserver

@@ -26,6 +26,10 @@ RUN Invoke-WebRequest -OutFile aspnetcore.zip https://dotnetcli.azureedge.net/do
 FROM $REPO:6.0-{{OS_VERSION}}
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV `
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION `
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/dotnet/shared/Microsoft.AspNetCore.App", "/Program Files/dotnet/shared/Microsoft.AspNetCore.App"]

eng/dockerfile-templates/aspnet/6.0/Dockerfile.windowsservercore

@@ -3,7 +3,11 @@
 ARG REPO=mcr.microsoft.com/dotnet/runtime
 FROM $REPO:6.0-{{OS_VERSION}}
 
-ENV ASPNET_VERSION={{VARIABLES["aspnet|6.0|build-version"]}}
+ENV `
+    # ASP.NET Core version
+    ASPNET_VERSION={{VARIABLES["aspnet|6.0|build-version"]}} `
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 RUN powershell -Command `
         $ErrorActionPreference = 'Stop'; `

eng/dockerfile-templates/sdk/6.0/Dockerfile.alpine

@@ -14,6 +14,8 @@ ENV \
     DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

eng/dockerfile-templates/sdk/6.0/Dockerfile.linux

@@ -12,6 +12,8 @@ ENV \
     DOTNET_SDK_VERSION={{VARIABLES["sdk|6.0|build-version"]}} \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

eng/dockerfile-templates/sdk/6.0/Dockerfile.nanoserver

@@ -54,6 +54,8 @@ ENV `
     DOTNET_SDK_VERSION=$DOTNET_SDK_VERSION `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= `
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip `
     # PowerShell telemetry for docker image usage

eng/dockerfile-templates/sdk/6.0/Dockerfile.windowsservercore

@@ -14,6 +14,8 @@ ENV `
     DOTNET_SDK_VERSION={{VARIABLES["sdk|6.0|build-version"]}} `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= `
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip `
     # PowerShell telemetry for docker image usage

src/aspnet/6.0/alpine3.13/amd64/Dockerfile

@@ -1,9 +1,13 @@
 ARG REPO=mcr.microsoft.com/dotnet/runtime
 FROM $REPO:6.0-alpine3.13-amd64
 
-# Install ASP.NET Core
-ENV ASPNET_VERSION=6.0.0-preview.3.21201.13
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=6.0.0-preview.3.21201.13 \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
+# Install ASP.NET Core
 RUN wget -O aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/aspnetcore/Runtime/$ASPNET_VERSION/aspnetcore-runtime-$ASPNET_VERSION-linux-musl-x64.tar.gz \
     && aspnetcore_sha512='80d451713218d1d0ce89d5d0e5205d82811e0a58aac299403cb7fd305f5f70acbe3b21854d2ff85d7666a48a083571c7ea661c7499f8900cac6571732876f831' \
     && echo "$aspnetcore_sha512  aspnetcore.tar.gz" | sha512sum -c - \

src/aspnet/6.0/alpine3.13/arm32v7/Dockerfile

@@ -1,9 +1,13 @@
 ARG REPO=mcr.microsoft.com/dotnet/runtime
 FROM $REPO:6.0-alpine3.13-arm32v7
 
-# Install ASP.NET Core
-ENV ASPNET_VERSION=6.0.0-preview.3.21201.13
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=6.0.0-preview.3.21201.13 \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
+# Install ASP.NET Core
 RUN wget -O aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/aspnetcore/Runtime/$ASPNET_VERSION/aspnetcore-runtime-$ASPNET_VERSION-linux-musl-arm.tar.gz \
     && aspnetcore_sha512='afd79e40125db4fc6907b4900060f76590762555d89c4baefb9fd87cd4e522db5144e59d777c7c9ecc51c9478b8f61cb921a8f17b48e36940f1e4cf7f1b24e09' \
     && echo "$aspnetcore_sha512  aspnetcore.tar.gz" | sha512sum -c - \

src/aspnet/6.0/alpine3.13/arm64v8/Dockerfile

@@ -1,9 +1,13 @@
 ARG REPO=mcr.microsoft.com/dotnet/runtime
 FROM $REPO:6.0-alpine3.13-arm64v8
 
-# Install ASP.NET Core
-ENV ASPNET_VERSION=6.0.0-preview.3.21201.13
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=6.0.0-preview.3.21201.13 \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
+# Install ASP.NET Core
 RUN wget -O aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/aspnetcore/Runtime/$ASPNET_VERSION/aspnetcore-runtime-$ASPNET_VERSION-linux-musl-arm64.tar.gz \
     && aspnetcore_sha512='09211c57972a5b2751cf6ba8947d62088974e73fdd1db4e52674dd460dc743ed58180e89434563170b99d735eec0fb88ac4c641076cbfe618c5d83a7708d9925' \
     && echo "$aspnetcore_sha512  aspnetcore.tar.gz" | sha512sum -c - \

src/aspnet/6.0/bullseye-slim/amd64/Dockerfile

@@ -17,6 +17,10 @@ RUN curl -SL --output aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/a
 FROM $REPO:6.0-bullseye-slim-amd64
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/shared/Microsoft.AspNetCore.App", "/usr/share/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/bullseye-slim/arm32v7/Dockerfile

@@ -17,6 +17,10 @@ RUN curl -SL --output aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/a
 FROM $REPO:6.0-bullseye-slim-arm32v7
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/shared/Microsoft.AspNetCore.App", "/usr/share/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/bullseye-slim/arm64v8/Dockerfile

@@ -17,6 +17,10 @@ RUN curl -SL --output aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/a
 FROM $REPO:6.0-bullseye-slim-arm64v8
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/shared/Microsoft.AspNetCore.App", "/usr/share/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/focal/amd64/Dockerfile

@@ -17,6 +17,10 @@ RUN curl -SL --output aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/a
 FROM $REPO:6.0-focal-amd64
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/shared/Microsoft.AspNetCore.App", "/usr/share/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/focal/arm32v7/Dockerfile

@@ -17,6 +17,10 @@ RUN curl -SL --output aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/a
 FROM $REPO:6.0-focal-arm32v7
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/shared/Microsoft.AspNetCore.App", "/usr/share/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/focal/arm64v8/Dockerfile

@@ -17,6 +17,10 @@ RUN curl -SL --output aspnetcore.tar.gz https://dotnetcli.azureedge.net/dotnet/a
 FROM $REPO:6.0-focal-arm64v8
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV \
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION \
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/shared/Microsoft.AspNetCore.App", "/usr/share/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/nanoserver-1809/amd64/Dockerfile

@@ -26,6 +26,10 @@ RUN Invoke-WebRequest -OutFile aspnetcore.zip https://dotnetcli.azureedge.net/do
 FROM $REPO:6.0-nanoserver-1809
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV `
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION `
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/dotnet/shared/Microsoft.AspNetCore.App", "/Program Files/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/nanoserver-2004/amd64/Dockerfile

@@ -26,6 +26,10 @@ RUN Invoke-WebRequest -OutFile aspnetcore.zip https://dotnetcli.azureedge.net/do
 FROM $REPO:6.0-nanoserver-2004
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV `
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION `
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/dotnet/shared/Microsoft.AspNetCore.App", "/Program Files/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/nanoserver-20H2/amd64/Dockerfile

@@ -26,6 +26,10 @@ RUN Invoke-WebRequest -OutFile aspnetcore.zip https://dotnetcli.azureedge.net/do
 FROM $REPO:6.0-nanoserver-20H2
 ARG ASPNET_VERSION
 
-ENV ASPNET_VERSION=$ASPNET_VERSION
+ENV `
+    # ASP.NET Core version
+    ASPNET_VERSION=$ASPNET_VERSION `
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 COPY --from=installer ["/dotnet/shared/Microsoft.AspNetCore.App", "/Program Files/dotnet/shared/Microsoft.AspNetCore.App"]

src/aspnet/6.0/windowsservercore-ltsc2019/amd64/Dockerfile

@@ -3,7 +3,11 @@
 ARG REPO=mcr.microsoft.com/dotnet/runtime
 FROM $REPO:6.0-windowsservercore-ltsc2019
 
-ENV ASPNET_VERSION=6.0.0-preview.3.21201.13
+ENV `
+    # ASP.NET Core version
+    ASPNET_VERSION=6.0.0-preview.3.21201.13 `
+    # Set the default console formatter to JSON
+    Logging__Console__FormatterName=Json
 
 RUN powershell -Command `
         $ErrorActionPreference = 'Stop'; `

src/sdk/6.0/alpine3.13/amd64/Dockerfile

@@ -14,6 +14,8 @@ ENV \
     DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/alpine3.13/arm32v7/Dockerfile

@@ -14,6 +14,8 @@ ENV \
     DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/alpine3.13/arm64v8/Dockerfile

@@ -14,6 +14,8 @@ ENV \
     DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/bullseye-slim/amd64/Dockerfile

@@ -12,6 +12,8 @@ ENV \
     DOTNET_SDK_VERSION=6.0.100-preview.3.21202.5 \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/bullseye-slim/arm32v7/Dockerfile

@@ -12,6 +12,8 @@ ENV \
     DOTNET_SDK_VERSION=6.0.100-preview.3.21202.5 \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/bullseye-slim/arm64v8/Dockerfile

@@ -12,6 +12,8 @@ ENV \
     DOTNET_SDK_VERSION=6.0.100-preview.3.21202.5 \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/focal/amd64/Dockerfile

@@ -12,6 +12,8 @@ ENV \
     DOTNET_SDK_VERSION=6.0.100-preview.3.21202.5 \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/focal/arm32v7/Dockerfile

@@ -12,6 +12,8 @@ ENV \
     DOTNET_SDK_VERSION=6.0.100-preview.3.21202.5 \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/focal/arm64v8/Dockerfile

@@ -12,6 +12,8 @@ ENV \
     DOTNET_SDK_VERSION=6.0.100-preview.3.21202.5 \
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true \
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= \
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip \
     # PowerShell telemetry for docker image usage

src/sdk/6.0/nanoserver-1809/amd64/Dockerfile

@@ -54,6 +54,8 @@ ENV `
     DOTNET_SDK_VERSION=$DOTNET_SDK_VERSION `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= `
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip `
     # PowerShell telemetry for docker image usage

src/sdk/6.0/nanoserver-2004/amd64/Dockerfile

@@ -54,6 +54,8 @@ ENV `
     DOTNET_SDK_VERSION=$DOTNET_SDK_VERSION `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= `
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip `
     # PowerShell telemetry for docker image usage

src/sdk/6.0/nanoserver-20H2/amd64/Dockerfile

@@ -54,6 +54,8 @@ ENV `
     DOTNET_SDK_VERSION=$DOTNET_SDK_VERSION `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= `
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip `
     # PowerShell telemetry for docker image usage

src/sdk/6.0/windowsservercore-ltsc2019/amd64/Dockerfile

@@ -14,6 +14,8 @@ ENV `
     DOTNET_SDK_VERSION=6.0.100-preview.3.21202.5 `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
+    # Unset Logging__Console__FormatterName from aspnet base image
+    Logging__Console__FormatterName= `
     # Skip extraction of XML docs - generally not useful within an image/container - helps performance
     NUGET_XMLDOC_MODE=skip `
     # PowerShell telemetry for docker image usage

tests/Microsoft.DotNet.Docker.Tests/AspnetImageTests.cs

@@ -50,6 +50,11 @@ public void VerifyEnvironmentVariables(ProductImageData imageData)
                 variables.Add(RuntimeImageTests.GetRuntimeVersionVariableInfo(imageData, DockerHelper));
             }
 
+            if (imageData.Version.Major >= 6)
+            {
+                variables.Add(new EnvironmentVariableInfo("Logging__Console__FormatterName", "Json"));
+            }
+
             base.VerifyCommonEnvironmentVariables(imageData, variables);
         }
 

tests/Microsoft.DotNet.Docker.Tests/SdkImageTests.cs

@@ -79,6 +79,7 @@ public void VerifyEnvironmentVariables(ProductImageData imageData)
             {
                 variables.Add(new EnvironmentVariableInfo("DOTNET_GENERATE_ASPNET_CERTIFICATE", "false"));
                 variables.Add(new EnvironmentVariableInfo("DOTNET_NOLOGO", "true"));
+                variables.Add(new EnvironmentVariableInfo("Logging__Console__FormatterName", string.Empty));
             }
 
             if (imageData.SdkOS.StartsWith(OS.AlpinePrefix))