Back up all volumes

for d in */; do tar -czf "${d%/}_$(date +%Y-%m-%dT%H-%M-%S).tgz" "$d"; done

Remove all of docker and start again

sudo systemctl stop docker
sudo apt-get purge -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
sudo rm -rf /var/lib/docker
sudo rm -rf /var/lib/containerd
sudo rm -rf /etc/docker
sudo apt-get autoremove -y

Then reinstall via Docker's official repo (not the Ubuntu snap/apt version):

curl -fsSL https://get.docker.com | sh

That script installs the latest stable Docker CE with all plugins. After that, add your user to the docker group if needed:

sudo usermod -aG docker sean

Then re-enable your services:

sudo systemctl enable --now docker
sudo systemctl enable --now hawser

1. Create a working directory

mkdir -p ~/.docker/tls && cd ~/.docker/tls

2. Generate the CA private key

openssl genrsa -aes256 -out ca-key.pem 4096

3. Generate the CA certificate

openssl req -new -x509 -days 365 -key ca-key.pem -sha256 -out ca.pem

You'll be prompted for a passphrase and subject info (Country, CN, etc.).

4. Generate the server private key

openssl genrsa -out server-key.pem 4096

5. Generate the server CSR (Certificate Signing Request)

openssl req -subj "/CN=<your-server-hostname-or-IP>" -sha256 -new -key server-key.pem -out server.csr

Replace <your-server-hostname-or-IP> with your Docker host's hostname or IP (e.g., mydockerhost or 192.168.1.10).

6. Create a SANs (Subject Alternative Names) extension file

echo subjectAltName = DNS:<hostname>,IP:<IP>,IP:127.0.0.1 > extfile.cnf
echo extendedKeyUsage = serverAuth >> extfile.cnf

Add all hostnames/IPs clients will use to reach the server.

7. Sign the server certificate with the CA

openssl x509 -req -days 365 -sha256 \
  -in server.csr -CA ca.pem -CAkey ca-key.pem \
  -CAcreateserial -out server-cert.pem -extfile extfile.cnf

8. Generate the client private key

openssl genrsa -out key.pem 4096

9. Generate the client CSR

openssl req -subj '/CN=client' -new -key key.pem -out client.csr

10. Create a client extension file

echo extendedKeyUsage = clientAuth > extfile-client.cnf

11. Sign the client certificate with the CA

openssl x509 -req -days 365 -sha256 \
  -in client.csr -CA ca.pem -CAkey ca-key.pem \
  -CAcreateserial -out cert.pem -extfile extfile-client.cnf

12. Clean up CSRs and extension files, lock down permissions

rm -f client.csr server.csr extfile.cnf extfile-client.cnf
chmod 0400 ca-key.pem key.pem server-key.pem
chmod 0444 ca.pem server-cert.pem cert.pem

After this you'll have:

┌──────────────────────────────────┬───────────────────────────────────────────────────┐
│               File               │                      Purpose                      │
├──────────────────────────────────┼───────────────────────────────────────────────────┤
│ ca.pem                           │ CA certificate (needed by both server and client) │
├──────────────────────────────────┼───────────────────────────────────────────────────┤
│ server-cert.pem / server-key.pem │ Server certificate and key                        │
├──────────────────────────────────┼───────────────────────────────────────────────────┤
│ cert.pem / key.pem               │ Client certificate and key                        │
└──────────────────────────────────┴───────────────────────────────────────────────────┘

1. Copy server certs to a permanent location

sudo mkdir -p /etc/docker/certs
sudo cp ~/.docker/tls/ca.pem /etc/docker/certs/
sudo cp ~/.docker/tls/server-cert.pem /etc/docker/certs/
sudo cp ~/.docker/tls/server-key.pem /etc/docker/certs/
sudo chmod 0444 /etc/docker/certs/ca.pem /etc/docker/certs/server-cert.pem
sudo chmod 0400 /etc/docker/certs/server-key.pem

2. Create or edit /etc/docker/daemon.json

sudo tee /etc/docker/daemon.json > /dev/null <<EOF
{
  "tls": true,
  "tlsverify": true,
  "tlscacert": "/etc/docker/certs/ca.pem",
  "tlscert": "/etc/docker/certs/server-cert.pem",
  "tlskey": "/etc/docker/certs/server-key.pem",
  "hosts": ["unix:///var/run/docker.sock", "tcp://0.0.0.0:2376"]
}
EOF

1. “tls”: true — enables TLS but allows unauthenticated clients
2. “tlsverify”: true — enforces mutual TLS (clients must present a valid cert)
3. Port 2376 is the standard TLS Docker port (2375 is unencrypted)

3. Handle the hosts conflict with systemd (WSL/Linux)

If Docker is managed by systemd, the -H flag in the service file conflicts with hosts in daemon.json. Override it:

sudo mkdir -p /etc/systemd/system/docker.service.d
sudo tee /etc/systemd/system/docker.service.d/override.conf > /dev/null <<EOF
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd
EOF

Enable systemd in WSL2 (recommended).

Edit /etc/wsl.conf

sudo tee /etc/wsl.conf > /dev/null <<EOF
[boot]
systemd=true
EOF

4. Reload and restart Docker

sudo systemctl daemon-reload
sudo systemctl restart docker

5. Verify Docker is listening on port 2376

sudo ss -tlnp | grep 2376

You should see dockerd bound to 0.0.0.0:2376. That confirms TLS is active and the daemon is accepting remote connections.

Run:

cd /workspace/Portainer/
./portainer.sh

#!/bin/sh

# From: https://rpi-wifi:8443/docker

docker ps |grep portainer|awk '{print $1}'|xargs docker stop
docker ps -a | grep portainer | awk '{print $1}' | xargs docker container rm
docker image ls|grep portainer|awk '{print $3}'|xargs docker rmi
docker run -d -p 8000:8000 -p 9000:9000 --name "Portainer" --restart always -v "/var/run/docker.sock:/var/run/docker.sock" -v portainer_data:/data portainer/portainer-ce:linux-arm
<code>

Start **Portainer** instance with ability to manage local **Docker Desktop for Windows**.
<code>
C:\Users\Varimathras>docker run -d -p 8000:8000 -p 9000:9000 --name "Portainer" --restart always -v "/var/run/docker.sock:/var/run/docker.sock" portainer/portainer-ce

Start Portainer instance on RPi.

$ docker run -d -p 8000:8000 -p 9000:9000 --name "Portainer" --restart always -v "/var/run/docker.sock:/var/run/docker.sock" -v portainer_data:/data portainer/portainer-ce:linux-arm

Run:

cd /workspace/Dokuwiki/
./dokuwiki.sh 

#!/bin/sh

# From: https://rpi-wifi:8443/docker

docker ps |grep dokuwiki|awk '{print $1}'|xargs docker stop
docker ps -a | grep dokuwiki | awk '{print $1}' | xargs docker container rm
docker image ls|grep dokuwiki|awk '{print $3}'|xargs docker rmi
docker-compose build; docker-compose up -d

$ sudo nano /lib/systemd/system/docker.service

After=media-usb.mount media-ssd.mount
Requires=media-usb.mount media-ssd.mount

From “unit files”:

$ sudo systemctl list-unit-files|grep mount

media-ssd.mount                                                               generated       -
media-usb.mount                                                               generated       -

Matching mount points:

$ df -kh
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       361G   85G  258G  25% /media/ssd
/dev/sdb1       7.3G  1.3G  5.7G  18% /media/usb

Access Docker volumes from WSL Linux instance:

# mount -t drvfs '\\wsl.localhost\docker-desktop\mnt\docker-desktop-disk\data\docker\volumes' /mnt/volumes

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