Downgrade urllib3 to 1.x to work around connectivity issues

Author: bantonsson

Dockerfile

@@ -69,6 +69,8 @@ COPY --from=default-jdk /usr/lib/jvm /usr/lib/jvm
 
 COPY autoforward.py /usr/local/bin/autoforward
 
+# Force downgrade of urllib3 to work around https://github.com/docker/docker-py/issues/3113
+# Install urllib3 early since it is also used by awscli
 RUN set -eux; \
     sudo apt-get update; \
     sudo apt-get install --no-install-recommends apt-transport-https socat; \
@@ -78,7 +80,7 @@ RUN set -eux; \
     sudo apt install python3-pip; \
     sudo apt-get -y clean; \
     sudo rm -rf /var/lib/apt/lists/*; \
-    pip3 install awscli; \
+    pip3 install "urllib3>=1.25.4,<2" awscli; \
     pip3 install requests requests-unixsocket; \
     pip3 cache purge; \
     sudo chmod +x /usr/local/bin/autoforward; \