github.com/inflatablewoman/deis@v1.0.1-0.20141111034523-a4511c46a6ce/registry/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=${ETCD_PATH:-/deis/registry}
    16  export ETCD_TTL=${ETCD_TTL:-10}
    17  
    18  # run.sh requires $REGISTRY_PORT
    19  export REGISTRY_PORT=${PORT:-5000}
    20  
    21  export BUCKET_NAME=${BUCKET_NAME:-registry}
    22  
    23  # wait for etcd to be available
    24  until etcdctl --no-sync -C $ETCD ls >/dev/null 2>&1; do
    25  	echo "waiting for etcd at $ETCD..."
    26  	sleep $(($ETCD_TTL/2))  # sleep for half the TTL
    27  done
    28  
    29  # wait until etcd has discarded potentially stale values
    30  sleep $(($ETCD_TTL+1))
    31  
    32  function etcd_set_default {
    33    set +e
    34    etcdctl --no-sync -C $ETCD mk $ETCD_PATH/$1 $2 >/dev/null 2>&1
    35    if [[ $? -ne 0 && $? -ne 4 ]]; then
    36      echo "etcd_set_default: an etcd error occurred. aborting..."
    37      exit 1
    38    fi
    39    set -e
    40  }
    41  
    42  # seed initial service configuration if necessary
    43  etcd_set_default protocol http
    44  etcd_set_default secretKey ${REGISTRY_SECRET_KEY:-`openssl rand -base64 64 | tr -d '\n'`}
    45  etcd_set_default bucketName ${BUCKET_NAME}
    46  
    47  # wait for confd to run once and install initial templates
    48  until confd -onetime -node $ETCD -config-file /app/confd.toml; do
    49  	echo "registry: waiting for confd to write initial templates..."
    50  	sleep $(($ETCD_TTL/2))  # sleep for half the TTL
    51  done
    52  
    53  # ensure registry bucket exists
    54  /app/bin/create_bucket ${BUCKET_NAME}
    55  
    56  # spawn the service in the background
    57  cd /docker-registry
    58  sudo -E -u registry docker-registry &
    59  SERVICE_PID=$!
    60  
    61  # smart shutdown on SIGINT and SIGTERM
    62  function on_exit() {
    63  	kill -TERM $SERVICE_PID
    64  	wait $SERVICE_PID 2>/dev/null
    65  	exit 0
    66  }
    67  trap on_exit INT TERM
    68  
    69  # spawn confd in the background to update services based on etcd changes
    70  confd -node $ETCD -config-file /app/confd.toml &
    71  CONFD_PID=$!
    72  
    73  echo deis-registry running...
    74  
    75  # publish the service to etcd using the injected EXTERNAL_PORT
    76  if [[ ! -z $EXTERNAL_PORT ]]; then
    77  
    78  	# configure service discovery
    79  	PORT=${PORT:-5000}
    80  	PROTO=${PROTO:-tcp}
    81  
    82  	set +e
    83  
    84  	# wait for the service to become available on PORT
    85  	sleep 1 && while [[ -z $(netstat -lnt | awk "\$6 == \"LISTEN\" && \$4 ~ \".$PORT\" && \$1 ~ \"$PROTO.?\"") ]] ; do sleep 1; done
    86  
    87  	# while the port is listening, publish to etcd
    88  	while [[ ! -z $(netstat -lnt | awk "\$6 == \"LISTEN\" && \$4 ~ \".$PORT\" && \$1 ~ \"$PROTO.?\"") ]] ; do
    89  		etcdctl --no-sync -C $ETCD set $ETCD_PATH/host $HOST --ttl $ETCD_TTL >/dev/null
    90  		etcdctl --no-sync -C $ETCD set $ETCD_PATH/port $EXTERNAL_PORT --ttl $ETCD_TTL >/dev/null
    91  		sleep $(($ETCD_TTL/2)) # sleep for half the TTL
    92  	done
    93  
    94  	# if the loop quits, something went wrong
    95  	exit 1
    96  
    97  fi
    98  
    99  wait