github.com/misfo/deis@v1.0.1-0.20141111224634-e0eee0392b8a/builder/bin/boot (about)

     1  #!/bin/bash
     2  #
     3  # This script is designed to be run inside the container
     4  #
     5  
     6  # fail hard and fast even on pipelines
     7  set -eo pipefail
     8  
     9  # set debug based on envvar
    10  [[ $DEBUG ]] && set -x
    11  
    12  # configure etcd
    13  export ETCD_PORT=${ETCD_PORT:-4001}
    14  export ETCD="$HOST:$ETCD_PORT"
    15  export ETCD_PATH=${ETCD_PATH:-/deis/builder}
    16  export ETCD_TTL=${ETCD_TTL:-10}
    17  export STORAGE_DRIVER=${STORAGE_DRIVER:-btrfs}
    18  
    19  # wait for etcd to be available
    20  until etcdctl --no-sync -C $ETCD ls >/dev/null 2>&1; do
    21  	echo "waiting for etcd at $ETCD..."
    22  	sleep $(($ETCD_TTL/2))  # sleep for half the TTL
    23  done
    24  
    25  # wait until etcd has discarded potentially stale values
    26  sleep $(($ETCD_TTL+1))
    27  
    28  function etcd_safe_mkdir {
    29  	set +e
    30  	etcdctl --no-sync -C $ETCD mkdir $1 >/dev/null 2>&1
    31  	if [[ $? -ne 0 && $? -ne 4 ]]; then
    32  		echo "etcd_safe_mkdir: an etcd error occurred. aborting..."
    33  		exit 1
    34  	fi
    35  	set -e
    36  }
    37  
    38  etcd_safe_mkdir $ETCD_PATH/users
    39  
    40  # wait for confd to run once and install initial templates
    41  until confd -onetime -node $ETCD -config-file /app/confd.toml; do
    42  	echo "builder: waiting for confd to write initial templates..."
    43  	sleep $(($ETCD_TTL/2))  # sleep for half the TTL
    44  done
    45  
    46  # spawn confd in the background to update services based on etcd changes
    47  confd -node $ETCD -config-file /app/confd.toml &
    48  CONFD_PID=$!
    49  
    50  # remove any pre-existing docker.sock
    51  test -e /var/run/docker.sock && rm -f /var/run/docker.sock
    52  
    53  # spawn a docker daemon to run builds
    54  docker -d --storage-driver=$STORAGE_DRIVER --bip=172.19.42.1/16 &
    55  DOCKER_PID=$!
    56  
    57  # wait for docker to start
    58  while [[ ! -e /var/run/docker.sock ]]; do
    59    sleep 1
    60  done
    61  
    62  # HACK: load progrium/cedarish tarball for faster boot times
    63  # see https://github.com/deis/deis/issues/1027
    64  if ! docker history progrium/cedarish >/dev/null 2>/dev/null ; then
    65      echo "Loading cedarish..."
    66      docker load -i /progrium_cedarish.tar
    67  else
    68      echo "Cedarish already loaded"
    69  fi
    70  
    71  # build required images
    72  docker build -t deis/slugbuilder /app/slugbuilder/
    73  docker build -t deis/slugrunner /app/slugrunner/
    74  
    75  # start an SSH daemon to process `git push` requests
    76  /usr/sbin/sshd -D -e &
    77  SSHD_PID=$!
    78  
    79  # smart shutdown on SIGINT and SIGTERM
    80  function on_exit() {
    81  	kill -TERM $DOCKER_PID $SSHD_PID
    82  	wait $DOCKER_PID $SSHD_PID 2>/dev/null
    83  	exit 0
    84  }
    85  trap on_exit INT TERM EXIT
    86  
    87  echo deis-builder running...
    88  
    89  # publish the service to etcd using the injected EXTERNAL_PORT
    90  if [[ ! -z $EXTERNAL_PORT ]]; then
    91  
    92  	# configure service discovery
    93  	PORT=${PORT:-22}
    94  	PROTO=${PROTO:-tcp}
    95  
    96  	set +e
    97  
    98  	# wait for the service to become available on PORT
    99  	sleep 1 && while [[ -z $(netstat -lnt | awk "\$6 == \"LISTEN\" && \$4 ~ \".$PORT\" && \$1 ~ \"$PROTO.?\"") ]] ; do sleep 1; done
   100  
   101  	# while the port is listening, publish to etcd
   102  	while [[ ! -z $(netstat -lnt | awk "\$6 == \"LISTEN\" && \$4 ~ \".$PORT\" && \$1 ~ \"$PROTO.?\"") ]] ; do
   103  		etcdctl --no-sync -C $ETCD set $ETCD_PATH/host $HOST --ttl $ETCD_TTL >/dev/null
   104  		etcdctl --no-sync -C $ETCD set $ETCD_PATH/port $EXTERNAL_PORT --ttl $ETCD_TTL >/dev/null
   105  		sleep $(($ETCD_TTL/2)) # sleep for half the TTL
   106  	done
   107  
   108  	# if the loop quits, something went wrong
   109  	exit 1
   110  
   111  fi
   112  
   113  wait