

![[16.0.0.3 and later]](../ng_v16003plus.gif)
Node.js 멤버 이미지의 예제 Dockerfile
Dockerfile 예제를 사용하여 Node.js 집합체 멤버 이미지를 작성합니다. Docker 이미지에는 Docker 컨테이너의 멤버 서버를 집합체 제어기에 참여시키는 joinMember 스크립트가 있습니다. Docker 이미지에는 집합체에서 Docker 컨테이너의 멤버 서버를 제거하는 removeMember 스크립트도 있습니다.
Dockerfile
다음 Dockerfile 예제를 사용하여 Node.js 집합체 멤버 이미지를 작성할 수 있습니다. Docker 허브에서 사용 가능한 이미지는 scalingMember-1.0 같은 Network Deployment 기능에 액세스할 수 없습니다. 마지막 두 행을 사용하여 Docker 이미지에 애플리케이션을 설치할 수 있습니다.
#
# Dockerfile to create a Node.js image
#
# This Dockerfile makes the following assumptions:
# - The collectives enabling scripts (joinMember, removeMember) will be placed in
# /opt/ibm/docker in the Docker container
# - Node.js servers are created at /root/wlpn
# - The Node.js server will be "defaultServer" (for example, /root/wlpn/defaultServer)
# - The application to install will already have its dependencies resolved by "npm install"
# - The Docker container will be run using --net=host, so that no ports are explicitly exported in this file
FROM node:4-slim
#
# Auto-start the Node.js server with the container
#
ENTRYPOINT ["/usr/local/bin/wlpn-server", "run", "defaultServer"]
#
# Add collectives enabling scripts
#
ADD joinMember /opt/ibm/docker/
RUN chmod +x /opt/ibm/docker/joinMember
ADD removeMember /opt/ibm/docker/
RUN chmod +x /opt/ibm/docker/removeMember
#
# Update the OS and JRE
#
RUN apt-get update
#
# Install APIConnect collective member
#
RUN npm install -g apiconnect-collective-member
#
# Use the code below to install an application for use onto the Docker image
#
COPY express-example-app-1.0.2.tgz /root/wlpn/
RUN wlpn-server unpack defaultServer /root/wlpn/express-example-app-1.0.2.tgz
joinMember 스크립트
Docker 이미지 joinMember 스크립트는 Docker 컨테이너의 멤버 서버를 집합체 제어기에 참여시킵니다.#!/bin/bash
#
# Script to join a Node.js Docker container to a collective controller.
#
# Required: <containerName> - positional parameter that is the name of this Docker container
# --host - collective controller hostname
# --port - collective controller https port
# --user - collective controller admin user
# --password - collective controller admin user password
# --keystorePassword - to be used for the member keystore
# --dockerHost - the hostname of the Docker host this container resides on
#
# Optional: --clusterName - cluster name for the member configuration.
If specified, adds the cluster and scaling member features.
#
# Set initial values
containerName=$1
# Parse the command line
failure="false"
if [[ -z $1 ]]; then
# No values received
echo "Error: no parameters specified"
failure="true"
else
TEMP=`getopt --long host:,port:,user:,password:,keystorePassword:,dockerHost:,clusterName:: -- "$@"`
eval set -- "$TEMP"
OPTIND=-1
while true ; do
case "$1" in
--host) controllerHost=$2; shift 2;;
--port) controllerPort=$2; shift 2;;
--user) controllerUser=$2; shift 2;;
--password) controllerPassword=$2; shift 2;;
--keystorePassword) memberKeystorePassword=$2; shift 2;;
--dockerHost) dockerHost=$2; shift 2;;
--clusterName) clusterName=$2; shift 2;;
*) break;;
esac
done
# Validate the required parameters
if [[ -z "$containerName" ]]; then
echo "Error: no containerName specified, validation suspended"
failure="true"
fi
# if a containerName is not specified, bash uses the 1st "--" parameter as the containerName
if [[ $containerName == --* ]]; then
echo "Error: no containerName specified, validation suspended"
failure="true"
fi
# When the positional parameter containerName fails, suspend validation reporting. getops can be incorrect.
if [[ $failure == false ]]; then
if [[ -z "${controllerHost// }" ]]; then
echo "Error: no host specified"
failure="true"
fi
if [[ -z "${controllerPort// }" ]]; then
echo "Error: no port specified"
failure="true"
fi
if [[ -z "${controllerUser// }" ]]; then
echo "Error: no user specified"
failure="true"
fi
if [[ -z "${controllerPassword// }" ]]; then
echo "Error: no password specified"
failure="true"
fi
if [[ -z "${memberKeystorePassword// }" ]]; then
echo "Error: no keystorePassword specified"
failure="true"
fi
if [[ -z "${dockerHost// }" ]]; then
echo "Error: no dockerHost specified"
failure="true"
fi
fi
fi
if [[ $failure == false ]]; then
# Create the env.properties file for the Liberty Docker member
echo containerName=$containerName > /opt/ibm/docker/env.properties
echo containerHost=$dockerHost >> /opt/ibm/docker/env.properties
# Run the join operation
if [[ $clusterName = *[!\ ]* ]]; then
wlpn-collective join defaultServer --host=$controllerHost --port=$controllerPort --user=$controllerUser --password=$controllerPassword --keystorePassword=$memberKeystorePassword --autoAcceptCertificates --hostName=$dockerHost --clusterName=$clusterName --genDeployVars
else
echo "No clusterName provided. The container will not be configured as a cluster or scaling member."
wlpn-collective join defaultServer --host=$controllerHost --port=$controllerPort --user=$controllerUser --password=$controllerPassword --keystorePassword=$memberKeystorePassword --autoAcceptCertificates --hostName=$dockerHost --genDeployVars
fi
else
# At least one required parameter is missing. Provide the correct syntax.
printf "Usage: joinMember <containerName> \n\t--host <controller host> \n\t--port <controller https port> \n\t--user <controller user> \n\t--password <controller password> \n\t--keystorePassword <member keystore password> \n\t--dockerHost <hostname of the Docker host> \n\t[--clusterName <cluster name for the member>]\n"
fi
removeMember 스크립트
Docker 이미지 removeMember 스크립트는 집합체에서 Docker 컨테이너의 멤버 서버를 제거합니다.#!/bin/bash
# Script to remove a StrongLoop Docker container from a collective controller.
#
# Required: <containerName> - positional parameter that is the name of this Docker container
# --host - collective controller hostname
# --port - collective controller https port
# --user - collective controller admin user
# --password - collective controller admin user password
# --dockerHost - the hostname of the Docker host on which this container resides
# Set initial values
containerName=$1
# Parse the command line
failure="false"
if [[ -z $1 ]]; then
# No values received
echo "Error: no parameters specified"
failure="true"
else
TEMP=`getopt --long host:,port:,user:,password:,dockerHost:: -- "$@"`
eval set -- "$TEMP"
OPTIND=-1
while true ; do
case "$1" in
--host) controllerHost=$2; shift 2;;
--port) controllerPort=$2; shift 2;;
--user) controllerUser=$2; shift 2;;
--password) controllerPassword=$2; shift 2;;
--dockerHost) dockerHost=$2; shift 2;;
*) break;;
esac
done
# Validate the required parameters
if [[ -z "$containerName" ]]; then
echo "Error: no containerName specified, validation suspended"
failure="true"
fi
# if a containerName is not specified, bash uses the 1st "--" parameter as the containerName
if [[ $containerName == --* ]]; then
echo "Error: no containerName specified, validation suspended"
failure="true"
fi
# When the positional parameter containerName fails, suspend validation reporting. getops can be incorrect.
if [[ $failure == false ]]; then
if [[ -z "${controllerHost// }" ]]; then
echo "Error: no host specified"
failure="true"
fi
if [[ -z "${controllerPort// }" ]]; then
echo "Error: no port specified"
failure="true"
fi
if [[ -z "${controllerUser// }" ]]; then
echo "Error: no user specified"
failure="true"
fi
if [[ -z "${controllerPassword// }" ]]; then
echo "Error: no password specified"
failure="true"
fi
if [[ -z "${dockerHost// }" ]]; then
echo "Error: no dockerHost specified"
failure="true"
fi
fi
fi
# Invoke the collective utility
if [[ $failure == false ]]; then
wlpn-collective remove defaultServer --host=$controllerHost --port=$controllerPort --user=$controllerUser --password=$controllerPassword --hostName=$dockerHost --autoAcceptCertificates
else
# At least one required parameter was missing. Provide the correct syntax.
printf "Usage: removeMember <containerName> \n\t--host=<controller host> \n\t--port=<controller https port> \n\t--user=<controller user> \n\t--password=<controller password> \n\t--dockerHost=<docker host> \n"
fi