dockerWSLTLS.sh

:#!/bin/bash

#Generate CA private key
openssl genrsa -aes256 -out ca-key.pem 4096
#Generate CA public key
openssl req -subj "/C=US/ST=Washington/L=Redmond/O=./OU=." -new -x509 -days 365 -key ca-key.pem -sha256 -out ca.pem

#Generate server key
openssl genrsa -out server-key.pem 4096
#Generate server signing request
HOST=$(cat /etc/hostname)
openssl req -subj "/CN=$HOST" -sha256 -new -key server-key.pem -out server.csr

echo subjectAltName = DNS:$HOST,IP:127.0.0.1 >> extfile.cnf
echo extendedKeyUsage = serverAuth >> extfile.cnf
#Sign the public key
openssl x509 -req -days 365 -sha256 -in server.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out server-cert.pem -extfile extfile.cnf

#Generate the client key 
openssl genrsa -out key.pem 4096
#Generate the client request
openssl req -subj '/CN=client' -new -key key.pem -out client.csr
echo extendedKeyUsage = clientAuth >> extfile.cnf
#Sign the public key
openssl x509 -req -days 365 -sha256 -in client.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out cert.pem -extfile extfile.cnf

#Now remove the certificate signing request
rm -v client.csr server.csr

#Remove write permissions to preserve from accidental damage
chmod -v 0400 ca-key.pem key.pem server-key.pem
chmod -v 0444 ca.pem server-cert.pem cert.pem

#Move the server keys over to the host
cp -v ca.pem /mnt/c/ProgramData/Docker
cp -v server* /mnt/c/ProgramData/Docker

#Make our connections secure by default
mkdir -pv ~/.docker
cp -v {ca,cert,key}.pem ~/.docker

export DOCKER_HOST=tcp://127.0.0.1:2376 DOCKER_TLS_VERIFY=1

Docker daemon.json needs to be updated to reflect the server keys.