Add docker-image in order to launch a base system capable of running docker daemon

recipes-core/images/docker-image.bb

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+SUMMARY = "A tiny image"
+HOMEPAGE = "https://blackfinn.de"
+LICENSE = "MIT"
+
+require tiny-image-base.inc
+
+IMAGE_INSTALL_append = " docker"
+
+export IMAGE_BASENAME = "tiny-image"
+

recipes-core/images/tiny-image-base.inc

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+inherit core-image
+
+require users.inc
+
+IMAGE_FEATURES += "package-management"
+
+CORE_OS = " \
+    openssh \
+    openssh-keygen \
+    openssh-sftp-server \
+    psplash \
+    tzdata \
+"
+
+KERNEL_EXTRA_INSTALL = " \
+    kernel-modules \
+"
+
+WIFI_SUPPORT = " \
+    wpa-supplicant \
+"
+
+EXTRA_TOOLS_INSTALL = " \
+"
+
+IMAGE_INSTALL += " \
+    ${CORE_OS} \
+    ${EXTRA_TOOLS_INSTALL} \
+    ${KERNEL_EXTRA_INSTALL} \
+    ${WIFI_SUPPORT} \
+"
+
+IMAGE_INSTALL_append_beaglebone-yocto = " linux-firmware-rtl8192cu"
+IMAGE_INSTALL_append_bananapi-m3 += " linux-firmware-bcm43430"
+
+set_local_timezone() {
+    ln -sf /usr/share/zoneinfo/Europe/Berlin ${IMAGE_ROOTFS}/etc/localtime
+}
+
+disable_bootlogd() {
+    echo BOOTLOGD_ENABLE=no > ${IMAGE_ROOTFS}/etc/default/bootlogd
+}
+
+ROOTFS_POSTPROCESS_COMMAND += " \
+    set_local_timezone ; \
+    disable_bootlogd ; \
+ "
+

recipes-core/images/tiny-image.bb

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+SUMMARY = "A tiny image"
+HOMEPAGE = "https://blackfinn.de"
+LICENSE = "MIT"
+
+require tiny-image-base.inc
+
+export IMAGE_BASENAME = "tiny-image"
+

recipes-core/images/users.inc

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+inherit extrausers
+
+# Encrypt the password with: echo "<password>" | openssl passwd -1 -stdin
+EXTRA_USERS_PARAMS = " \
+    usermod -p '\$1\$4h5Qdc3i\$Vke4J2Ci5z.D3TtFDmV9r/' root; \
+    useradd -p '\$1\$4h5Qdc3i\$Vke4J2Ci5z.D3TtFDmV9r/' tkl; \
+"
+