Difference between revisions of "Dgraph"

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Dgraph is an OpenSource Graph Database based on {{Link|target=GraphQL}}
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To try out the Dgraph features via Python we created the Open Source project: {{Link|target=DgraphAndWeaviateTest}}
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 +
= Links =
 
* https://dgraph.io
 
* https://dgraph.io
 
* https://dgraph.io/tour/
 
* https://dgraph.io/tour/
 +
* https://github.com/bytefish/DGraphSample/
 +
 +
= Ratel =
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* https://github.com/dgraph-io/ratel
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= Fast Data loading =
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* https://dgraph.io/docs/deploy/fast-data-loading/
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 +
= Forum =
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* https://discuss.dgraph.io/
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 +
= 2020-08-05 =
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<source lang='bash'>
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docker pull dgraph/dgraph:v20.03.0
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mkdir -p ~/dgraph
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</source>
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== Dgraph Test project ==
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* https://github.com/WolfgangFahl/DgraphAndWeaviateTest
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 +
== Dgraph start script ==
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see
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* https://stackoverflow.com/questions/63260073/starting-zero-alpha-and-ratel-in-a-single-command-e-g-in-macosx-and-other-envir
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* https://discuss.dgraph.io/t/dgraph-start-script/9231
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<source lang='bash'>
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#!/bin/bash
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# WF 2020-08-05
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# see https://dgraph.io/tour/intro/2/
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 +
version=v20.03.0
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 +
#ansi colors
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#http://www.csc.uvic.ca/~sae/seng265/fall04/tips/s265s047-tips/bash-using-colors.html
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blue='\033[0;34m'
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red='\033[0;31m'
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green='\033[0;32m' # '\e[1;32m' is too bright for white bg.
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endColor='\033[0m'
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#
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# a colored message
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#  params:
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#    1: l_color - the color of the message
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#    2: l_msg - the message to display
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#
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color_msg() {
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  local l_color="$1"
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  local l_msg="$2"
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  echo -e "${l_color}$l_msg${endColor}"
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}
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#
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# error
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#
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# show the given error message on stderr and exit
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#
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#  params:
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#    1: l_msg - the error message to display
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#
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error() {
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  local l_msg="$1"
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  # use ansi red for error
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  color_msg $red "Error:" 1>&2
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  color_msg $red "\t$l_msg" 1>&2
 +
  exit 1
 +
}
 +
 +
 +
# show usage
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#
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usage() {
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  echo "$0 [-h|--help|-k|--kill"
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  echo ""
 +
  echo "-b | --bash: start a bash terminal shell within the currently running container"
 +
  echo "-h | --help: show this usage"
 +
  echo "-k | --kill: stop the docker image"
 +
  exit 1
 +
}
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#
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# stop the docker image
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#
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stopImage() {
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  color_msg $blue "stopping and removing dgraph image ..."
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  docker stop dgraph
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  docker rm dgraph
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  color_msg $green "...done"
 +
}
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 +
#
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# start a bash shell within the currently running container
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#
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bashInto() {
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  sudo docker exec -it dgraph bash
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}
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 +
#
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# dgraph zero
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#
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zero() {
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  docker run -it -p 5080:5080 -p 6080:6080 -p 8080:8080 \
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  -p 9080:9080 -p 8000:8000 -v ~/dgraph:/dgraph --name dgraph \
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  dgraph/dgraph:$version dgraph zero
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}
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#
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# dgraph alpha
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#
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alpha() {
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  docker exec -it dgraph dgraph alpha --lru_mb 2048 --zero localhost:5080 --whitelist 0.0.0.0/0
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}
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#
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# dgraph ratel
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#
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ratel() {
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  docker exec -it dgraph dgraph-ratel
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}
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me=$0
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dir=$(dirname $0)
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base=$(basename $0)
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if [ $# -lt 1 ]
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then
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case $base in
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  dgraph)
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    # Run Dgraph zero
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    # And in another, run ratel (Dgraph UI)
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    # In another terminal, now run Dgraph alpha
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    for option in zero ratel alpha
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    do
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      #echo $dir $option
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      open -a terminal.app $dir/$option
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      # wait a bit
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      sleep 2
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    done
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    ;;
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    alpha) alpha;;
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    ratel) ratel;;
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    zero) zero;;
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  esac
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fi
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# commandline option
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while [  "$1" != ""  ]
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do
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  option="$1"
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  case $option in
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    alpha) alpha;;
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    ratel) ratel;;
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    zero) zero;;
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    -b|--bash) bashInto;;
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    -k|--kill) stopImage;;
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    -h|--help) usage;;
 +
  esac
 +
  shift
 +
done
 +
 +
</source>

Latest revision as of 17:43, 11 August 2020

Dgraph is an OpenSource Graph Database based on GraphQL To try out the Dgraph features via Python we created the Open Source project: DgraphAndWeaviateTest

Links

Ratel

Fast Data loading

Forum

2020-08-05

docker pull dgraph/dgraph:v20.03.0
mkdir -p ~/dgraph

Dgraph Test project

Dgraph start script

see 

#!/bin/bash
# WF 2020-08-05
# see https://dgraph.io/tour/intro/2/

version=v20.03.0

#ansi colors
#http://www.csc.uvic.ca/~sae/seng265/fall04/tips/s265s047-tips/bash-using-colors.html
blue='\033[0;34m'
red='\033[0;31m'
green='\033[0;32m' # '\e[1;32m' is too bright for white bg.
endColor='\033[0m'

#
# a colored message
#   params:
#     1: l_color - the color of the message
#     2: l_msg - the message to display
#
color_msg() {
  local l_color="$1"
  local l_msg="$2"
  echo -e "${l_color}$l_msg${endColor}"
}

#
# error
#
# show the given error message on stderr and exit
#
#   params:
#     1: l_msg - the error message to display
#
error() {
  local l_msg="$1"
  # use ansi red for error
  color_msg $red "Error:" 1>&2
  color_msg $red "\t$l_msg" 1>&2
  exit 1
}


# show usage
#
usage() {
  echo "$0 [-h|--help|-k|--kill"
  echo ""
  echo "-b | --bash: start a bash terminal shell within the currently running container"
  echo "-h | --help: show this usage"
  echo "-k | --kill: stop the docker image"
  exit 1
}

#
# stop the docker image
#
stopImage() {
  color_msg $blue "stopping and removing dgraph image ..."
  docker stop dgraph
  docker rm dgraph
  color_msg $green "...done"
}

#
# start a bash shell within the currently running container
#
bashInto() {
  sudo docker exec -it dgraph bash
}

#
# dgraph zero
#
zero() {
  docker run -it -p 5080:5080 -p 6080:6080 -p 8080:8080 \
  -p 9080:9080 -p 8000:8000 -v ~/dgraph:/dgraph --name dgraph \
  dgraph/dgraph:$version dgraph zero
}

#
# dgraph alpha
#
alpha() {
  docker exec -it dgraph dgraph alpha --lru_mb 2048 --zero localhost:5080 --whitelist 0.0.0.0/0
}

#
# dgraph ratel
#
ratel() {
  docker exec -it dgraph dgraph-ratel
}

me=$0
dir=$(dirname $0)
base=$(basename $0)
if [ $# -lt 1 ]
then
case $base in
  dgraph)
    # Run Dgraph zero
    # And in another, run ratel (Dgraph UI)
    # In another terminal, now run Dgraph alpha
    for option in zero ratel alpha
    do
      #echo $dir $option
      open -a terminal.app $dir/$option
      # wait a bit
      sleep 2
    done
    ;;
    alpha) alpha;;
    ratel) ratel;;
    zero) zero;;
  esac
fi
# commandline option
while [  "$1" != ""  ]
do
  option="$1"
  case $option in
    alpha) alpha;;
    ratel) ratel;;
    zero) zero;;
    -b|--bash) bashInto;;
    -k|--kill) stopImage;;
    -h|--help) usage;;
  esac
  shift
done
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