udocker for Termux, with patches applied to fix it. Now you can use it in Android too. udocker allows running docker images without root/custom kernels - https://github.com/indigo-dc/udocker

install_udocker.sh

#!/data/data/com.termux/files/usr/bin/bash

install_udocker(){

apt update

yes | pkg install -y python-pip patch proot

if pip freeze | grep -Eq "^udocker=="; then
  pip uninstall -y udocker
fi

pip install -U udocker

}

fix_udocker(){

fix_udocker_conf(){
mkdir -p "${HOME}/.udocker/lib"

cat <<'EOF' > "${HOME}/.udocker/udocker.conf"
[DEFAULT]
use_proot_executable = /data/data/com.termux/files/usr/bin/proot
proot_link2symlink = True
verbose_level = 1
EOF

echo "2.9.9" > "${HOME}/.udocker/lib/VERSION"
}

fix_udocker_hardlinks(){
# Fix errors when extracting hardlinks from Docker images
# https://github.com/indigo-dc/udocker/issues/388#issuecomment-1527277800
UDOCKER_PATCH='
--- udocker/container/structure.py
+++ udocker.mod/container/structure.py
@@ -281,7 +281,7 @@
             if Msg.level >= Msg.VER:
                 verbose = '\'v'\''
                 Msg().out("Info: extracting:", tarf, l=Msg.INF)
-            cmd = ["tar", "-C", destdir, "-x" + verbose,
+            cmd = ["proot", "--link2symlink", "tar", "-C", destdir, "-x" + verbose,
                    "--one-file-system", "--no-same-owner", "--overwrite",
                    "--exclude=dev/*", "--exclude=etc/udev/devices/*",
                    "--no-same-permissions", r"--exclude=.wh.*",
'

TMP_PATCH_FILE="$(mktemp)"
patch -p0 --no-backup-if-mismatch -r "${TMP_PATCH_FILE}" -d "$(python -c "import sysconfig; print(sysconfig.get_path('platlib'))" 2>/dev/null || echo "${PREFIX}/lib/python3.11/site-packages")" 2>/dev/null >/dev/null <<< "${UDOCKER_PATCH}" || true
rm -rf "${TMP_PATCH_FILE}"

return 0
}

fix_udocker_qemu(){
# Fix qemu not found errors that occurs when running non-native platform containers
# Not needed for g4f container, but helpful for your other platform containers if any
UDOCKER_PATCH='
--- udocker/engine/base.py
+++ udocker.mod/engine/base.py
@@ -690,4 +690,4 @@
         if not qemu_path:
             Msg().err("Warning: qemu required but not available", l=Msg.WAR)
             return ""
-        return qemu_path if return_path else qemu_filename
+        return qemu_path if return_path else qemu_path
'

TMP_PATCH_FILE="$(mktemp)"
patch -p0 --no-backup-if-mismatch -r "${TMP_PATCH_FILE}" -d "$(python -c "import sysconfig; print(sysconfig.get_path('platlib'))" 2>/dev/null || echo "${PREFIX}/lib/python3.11/site-packages")" 2>/dev/null >/dev/null <<< "${UDOCKER_PATCH}" || true
rm -rf "${TMP_PATCH_FILE}"

return 0
}

fix_udocker_proot(){
# Fix shm errors
# https://github.com/termux/proot-distro/issues/19
# Fix hardcoded bad port errors
#https://github.com/termux/proot-distro/issues/22
UDOCKER_PATCH='
--- udocker/engine/proot.py
+++ udocker.mod/engine/proot.py
@@ -166,7 +166,7 @@
 
         if (Config.conf['proot_link2symlink'] and
                 self._has_option("--link2symlink")):
-            proot_link2symlink = ["--link2symlink", ]
+            proot_link2symlink = ["--link2symlink", "--sysvipc", "-L", "-p", ]
         else:
             proot_link2symlink = []
'

TMP_PATCH_FILE="$(mktemp)"
patch -p0 --no-backup-if-mismatch -r "${TMP_PATCH_FILE}" -d "$(python -c "import sysconfig; print(sysconfig.get_path('platlib'))" 2>/dev/null || echo "${PREFIX}/lib/python3.11/site-packages")" 2>/dev/null >/dev/null <<< "${UDOCKER_PATCH}" || true
rm -rf "${TMP_PATCH_FILE}"

return 0
}

fix_udocker_conf

fix_udocker_hardlinks

fix_udocker_qemu

fix_udocker_proot

}

install_udocker

fix_udocker