gistfile1.txt

$ sudo ./try.sh
Pod 1: 37 mounts
Pod 2: 185 mounts
Pod 3: 1517 mounts
Pod 4: 66785 mounts

-----------------------------------
#!/bin/bash

RKTDIR=/tmp/rkt-tests-$RANDOM/var/lib/rkt/

mkdir -p $RKTDIR
cd $RKTDIR

start_new_rkt_fly() {
  UUID=$1
  STAGE2ROOT=pods/run/$UUID/stage1/rootfs/opt/stage2/myapp/rootfs/
  mkdir -p ${STAGE2ROOT}/{bin,etc,usr,lib,host-root}
  mount --rbind / ${STAGE2ROOT}/host-root
  mount --make-rshared ${STAGE2ROOT}/host-root
}

for i in $(seq 1 4) ; do
  start_new_rkt_fly $i
  echo "Pod $i: "$(mount|grep '/tmp/rkt-test[s]'|wc -l)" mounts"
done