Gitea

alpine/simple/build.sh

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+#!/bin/sh
+
+ROOTFS=`mktemp -d rootfs.XXX -t`
+TMPDIR=/tmp
+TARBALL=alpine-minirootfs-3.9.0-x86_64.tar.gz
+URL=http://dl-cdn.alpinelinux.org/alpine/v3.9/releases/x86_64/$TARBALL
+
+[ "$URL" ] && wget -c $URL
+
+mkdir $ROOTFS
+
+# 1. create rootfs
+tar xf $TARBALL -C $ROOTFS/ \
+    ./etc/os-release ./usr ./lib ./bin ./sbin
+
+# 2. create mount points
+mkdir -p $ROOTFS/etc/systemd/system $ROOTFS/var/{lib,run,tmp} $ROOTFS/{dev,proc,sys,tmp,run,root}
+touch $ROOTFS/etc/machine-id $ROOTFS/etc/resolv.conf
+
+# 3. simple service unit
+cat <<EOF > $ROOTFS/etc/systemd/system/simple.service
+[Unit]
+Description=Simple portable test service
+
+[Service]
+Type=exec
+ExecStart=/bin/sh -c 'while /bin/sleep 5; do echo ping; done'
+EOF
+
+# 4. create a read-only squashfs rootfs image
+mksquashfs $ROOTFS $TMPDIR/simple.raw -all-root -noappend
+
+# 5. attach and start the service
+sudo portablectl attach $TMPDIR/simple.raw
+sudo systemctl start simple-test
+
+# 6. undo
+#sudo systemctl stop simple-test
+#sudo portablectl detach $TMPDIR/simple.raw