Docker support

Firefly normal firmware generally does not meet Docker operation requirements. If there is a need, you can use SDK to enable related kernel configs and rebuild the kernel to support Docker.

(RK356X v1.2.4a and later version, RK3399/RK3588 support Docker by default, you can skip straight to the installation step)

The following case is based on Firefly Ubuntu 20.04, and the kernel configuration part is generic!

Check Kernel Configuration

First use script to see which configuration is needed by Docker but missing in current kernel. You can get the check script from GitHub.

After get the script, begin to check:

#Copy the script to SDK/kernel/
cp check-config.sh PathToSDK/kernel/
cd PathToSDK/kernel
chmod +x check-config.sh

#Check
#You need to build kernel first to get correct .config
./check-config.sh .config

The result looks like this, mainly two parts:

Generally Necessary:
- cgroup hierarchy: properly mounted [/sys/fs/cgroup]
- apparmor: enabled and tools installed
- CONFIG_NAMESPACES: enabled
- CONFIG_NET_NS: enabled
- CONFIG_PID_NS: enabled
- CONFIG_IPC_NS: enabled
- CONFIG_UTS_NS: enabled
- CONFIG_CGROUPS: enabled
......

Optional Features:
- CONFIG_USER_NS: enabled
- CONFIG_SECCOMP: enabled
- CONFIG_SECCOMP_FILTER: enabled
- CONFIG_CGROUP_PIDS: enabled
- CONFIG_MEMCG_SWAP: enabled
......

Generally Necessary: All features in this part need to be enabled in kernel.

Optional Features: Enable them as you needed.