github.com/decred/dcrlnd@v0.7.6/docker/dcrlnd/start-dcrlnd.sh (about)

     1  #!/usr/bin/env bash
     2  
     3  # exit from script if error was raised.
     4  set -e
     5  
     6  # error function is used within a bash function in order to send the error
     7  # message directly to the stderr output and exit.
     8  error() {
     9      echo "$1" > /dev/stderr
    10      exit 0
    11  }
    12  
    13  # return is used within bash function in order to return the value.
    14  return() {
    15      echo "$1"
    16  }
    17  
    18  # set_default function gives the ability to move the setting of default
    19  # env variable from docker file to the script thereby giving the ability to the
    20  # user override it during container start.
    21  set_default() {
    22      # docker initialized env variables with blank string and we can't just
    23      # use -z flag as usually.
    24      BLANK_STRING='""'
    25  
    26      VARIABLE="$1"
    27      DEFAULT="$2"
    28  
    29      if [[ -z "$VARIABLE" || "$VARIABLE" == "$BLANK_STRING" ]]; then
    30  
    31          if [ -z "$DEFAULT" ]; then
    32              error "You should specify default variable"
    33          else
    34              VARIABLE="$DEFAULT"
    35          fi
    36      fi
    37  
    38     return "$VARIABLE"
    39  }
    40  
    41  # Set default variables if needed.
    42  RPCUSER=$(set_default "$RPCUSER" "devuser")
    43  RPCPASS=$(set_default "$RPCPASS" "devpass")
    44  DEBUG=$(set_default "$DEBUG" "debug")
    45  NETWORK=$(set_default "$NETWORK" "simnet")
    46  BACKEND="dcrd"
    47  
    48  PARAMS=""
    49  if [ "$NETWORK" != "mainnet" ]; then
    50     PARAMS=$(echo --$NETWORK)
    51  fi
    52  
    53  # CAUTION: DO NOT use the --noseedback for production/mainnet setups, ever!
    54  # Also, setting --rpclisten to 0.0.0.0 will cause it to listen on an IP
    55  # address that is reachable on the internal network. If you do this outside of
    56  # docker, this might be a security concern!
    57  
    58  PARAMS=$(echo $PARAMS \
    59      --noseedbackup \
    60      --logdir=/data \
    61      --node=dcrd \
    62      "--$BACKEND.rpccert"="/rpc/rpc.cert" \
    63      "--$BACKEND.rpchost"="dcrd" \
    64      "--$BACKEND.rpcuser"="$RPCUSER" \
    65      "--$BACKEND.rpcpass"="$RPCPASS" \
    66      --rpclisten=0.0.0.0 \
    67      "--rpclisten=localhost:10009" \
    68      --restlisten=0.0.0.0 \
    69      --listen=0.0.0.0 \
    70      --debuglevel="$DEBUG" \
    71      "$@"
    72  )
    73  
    74  echo "Run dcrlnd $PARAMS"
    75  exec dcrlnd $PARAMS