dokku-redis/functions

#!/usr/bin/env bash
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/common-functions"
source "$PLUGIN_BASE_PATH/common/functions"
source "$PLUGIN_AVAILABLE_PATH/config/functions"
if [[ -f "$PLUGIN_AVAILABLE_PATH/docker-options/functions" ]]; then
  source "$PLUGIN_AVAILABLE_PATH/docker-options/functions"
fi

# non-generic functions

service_connect() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local PASSWORD="$(service_password "$SERVICE")"
  local SERVICE_TTY_OPTS
  has_tty && SERVICE_TTY_OPTS="-t"

  docker exec -i $SERVICE_TTY_OPTS "$SERVICE_NAME" redis-cli -a "$PASSWORD"
}

service_create() {
  local SERVICE="$1"
  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a name for the service"
  [[ ! -d "$PLUGIN_DATA_ROOT/$SERVICE" ]] || dokku_log_fail "$PLUGIN_SERVICE service $SERVICE already exists"
  SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"

  service_parse_args "${@:2}"

  if ! docker images | grep -e "^$PLUGIN_IMAGE " | grep -q " $PLUGIN_IMAGE_VERSION " ; then
    docker pull "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" || dokku_log_fail "$PLUGIN_SERVICE image $PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION pull failed"
  fi

  mkdir -p "$SERVICE_ROOT" || dokku_log_fail "Unable to create service directory"
  mkdir -p "$SERVICE_ROOT/data" || dokku_log_fail "Unable to create service data directory"
  mkdir -p "$SERVICE_ROOT/config" || dokku_log_fail "Unable to create service config directory"
  if [[ -z $REDIS_CONFIG_PATH ]] ; then
    curl -sSL "https://raw.githubusercontent.com/antirez/redis/${PLUGIN_IMAGE_VERSION:0:3}/redis.conf" > "$SERVICE_ROOT/config/redis.conf" || dokku_log_fail "Unable to download the default redis.conf to the config directory"
  else
    cp "$REDIS_CONFIG_PATH" "$SERVICE_ROOT/config/redis.conf" || dokku_log_fail "Unable to copy the ${REDIS_CONFIG_PATH} to the config directory"
  fi
  PASSWORD=$(openssl rand -hex 32)
  if [[ -n "$SERVICE_PASSWORD" ]]; then
    PASSWORD="$SERVICE_PASSWORD"
    dokku_log_warn "Specified password may not be as secure as the auto-generated password"
  fi
  echo "$PASSWORD" > "$SERVICE_ROOT/PASSWORD"
  chmod 640 "$SERVICE_ROOT/PASSWORD"
  sed -i.bak "s/# requirepass.*/requirepass ${PASSWORD}/" "$SERVICE_ROOT/config/redis.conf" && rm "$SERVICE_ROOT/config/redis.conf.bak"
  touch "$LINKS_FILE"

  [[ -n "$SERVICE_CUSTOM_ENV" ]] && REDIS_CUSTOM_ENV="$SERVICE_CUSTOM_ENV"
  if [[ -n $REDIS_CUSTOM_ENV ]]; then
    echo "$REDIS_CUSTOM_ENV" | tr ';' "\n" > "$SERVICE_ROOT/ENV"
  else
    echo "" > "$SERVICE_ROOT/ENV"
  fi
  service_create_container "$SERVICE"
}

service_create_container() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_HOST_ROOT="$PLUGIN_DATA_HOST_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"

  ID=$(docker run --name "$SERVICE_NAME" -v "$SERVICE_HOST_ROOT/data:/data" -v "$SERVICE_HOST_ROOT/config:/usr/local/etc/redis" --env-file="$SERVICE_ROOT/ENV" -d --restart always --label dokku=service --label dokku.service=redis "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" redis-server /usr/local/etc/redis/redis.conf --bind 0.0.0.0)
  echo "$ID" > "$SERVICE_ROOT/ID"

  dokku_log_verbose_quiet "Waiting for container to be ready"
  docker run --rm --link "$SERVICE_NAME:$PLUGIN_COMMAND_PREFIX" dokkupaas/wait:0.2 -p "$PLUGIN_DATASTORE_WAIT_PORT" > /dev/null

  dokku_log_info2 "$PLUGIN_SERVICE container created: $SERVICE"
  service_info "$SERVICE"
}

service_export() {
  local SERVICE="$1"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local PASSWORD="$(service_password "$SERVICE")"

  [[ -n $SSH_TTY ]] && stty -opost
  docker exec "$SERVICE_NAME" bash -c "echo SAVE | redis-cli -a ${PASSWORD}" > /dev/null 2>&1
  docker exec "$SERVICE_NAME" cat /data/dump.rdb
  status=$?
  [[ -n $SSH_TTY ]] && stty opost
  exit $status
}

service_import() {
  local SERVICE="$1"
  SERVICE_HOST_ROOT="$PLUGIN_DATA_HOST_ROOT/$SERVICE"
  SERVICE_NAME="$(get_service_name "$SERVICE")"

  if [[ -t 0 ]]; then
    dokku_log_fail "No data provided on stdin."
  fi
  dokku "$PLUGIN_COMMAND_PREFIX:stop" "$SERVICE" > /dev/null 2>&1
  docker run --rm -i -v "$SERVICE_HOST_ROOT/data:/data" "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" bash -c "cat > /data/dump.rdb && chown redis: /data/dump.rdb"
  dokku "$PLUGIN_COMMAND_PREFIX:start" "$SERVICE" > /dev/null 2>&1
}

service_start() {
  local SERVICE="$1"
  local QUIET="$2"
  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
  local SERVICE_NAME="$(get_service_name "$SERVICE")"
  local ID=$(docker ps -f status=running | grep -e "$SERVICE_NAME$" | awk '{print $1}') || true
  if [[ -n $ID ]]; then
    [[ -z $QUIET ]] && dokku_log_warn "Service is already started"
    return 0
  fi

  dokku_log_info1_quiet "Starting container"
  local PREVIOUS_ID=$(docker ps -f status=exited | grep -e "$SERVICE_NAME$" | awk '{print $1}') || true
  local IMAGE_EXISTS=$(docker images | grep -e "^$PLUGIN_IMAGE " | grep -q " $PLUGIN_IMAGE_VERSION " && true)

  if [[ -n $PREVIOUS_ID ]]; then
    docker start "$PREVIOUS_ID" > /dev/null
    service_port_unpause "$SERVICE"
    dokku_log_info2 "Container started"
  elif $IMAGE_EXISTS; then
    service_create_container "$SERVICE"
  else
    dokku_log_verbose_quiet "Neither container nor valid configuration exists for $SERVICE"
  fi
}

service_password() {
    local SERVICE="$1"
    local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
    local PASSWORD="$(cat "$SERVICE_ROOT/PASSWORD")"
    echo "$PASSWORD"
}

service_url() {
  local SERVICE="$1"
  local PASSWORD="$(service_password "$SERVICE")"
  local SERVICE_ALIAS="$(service_alias "$SERVICE")"
  echo "$PLUGIN_SCHEME://$SERVICE:$PASSWORD@$SERVICE_ALIAS:${PLUGIN_DATASTORE_PORTS[0]}"
}