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Liberty Network Deployment 映像檔的 Dockerfile 範例

使用 Dockerfile 範例來建立 Liberty Network Deployment 映像檔。Docker 映像檔有 joinMember Script,可將 Docker 儲存器中的成員伺服器加入群體控制器。 Docker 映像檔還有 removeMember Script,可將 Docker 儲存器中的成員伺服器從群體移除。

Dockerfile

下列 Dockerfile 範例可以建立 Liberty Network Deployment 映像檔。Docker Hub 上提供的映像檔無法存取 Liberty Network Deployment 特性,例如 scalingMember-1.0。請使用這個檔案來建立 Liberty Network Deployment 映像檔。您可以使用最後一行,將要使用的應用程式複製到 Docker 映像檔。

# 
# Dockerfile to create a Liberty Network Deployment image
#
# This Dockerfile assumes:
# - The collective enabling scripts (joinMember, removeMember) will be placed in
#   /opt/ibm/docker in the Docker container
# - WebSphere Liberty will be installed at /opt/ibm/wlp
# - The WebSphere Liberty server will be "defaultServer"
#   (for example, /opt/ibm/wlp/usr/servers/defaultServer)
# - The Docker container runs using --net=host so that no ports are explicitly
#   exported in this file

FROM websphere-liberty

#
# Auto-start the Liberty server with the container
#
ENTRYPOINT ["/opt/ibm/wlp/bin/server", "run", "defaultServer"]
#
#

#
# Add collective 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 operating system
#
RUN apt-get update

#
# Add the additional required features
#
RUN installUtility install --acceptLicense scalingMember-1.0 clusterMember-1.0
collectiveMember-1.0

ADD server.xml /opt/ibm/wlp/usr/servers/defaultServer/

#
# Insert your application file name. This statement copies the application
# onto the Docker image.
# 
ADD application_file /opt/ibm/wlp/usr/servers/defaultServer/dropins/

joinMember Script

Docker 映像檔 joinMember Script 可將 Docker 儲存器中的成員伺服器加入群體控制器:
#!/bin/bash

#
# Script to join a Liberty 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 - hostname of the Docker host this container resides on
#
# Optional: --clusterName - cluster name for the member configuration.
#                           If specified, it adds the cluster and scaling
#                           member features also.
#

# 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
    
    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


    # Invoke the collective utility

    /opt/ibm/wlp/bin/collective join defaultServer --host=$controllerHost --port=$controllerPort --user=$controllerUser --password=$controllerPassword --hostName=$dockerHost --createConfigFile --keystorePassword=$memberKeystorePassword --autoAcceptCertificates --genDeployVariables


    # Build additional config dropin snippets

    if [[ $clusterName = *[!\ ]* ]]; then
        echo \<?xml version=\"1.0\" encoding=\"UTF-8\" ?\> > /opt/ibm/wlp/usr/servers/defaultServer/cfgfeatures.xml
        echo \<server\> >> /opt/ibm/wlp/usr/servers/defaultServer/cfgfeatures.xml
        echo $'\t'\<featureManager\> >> /opt/ibm/wlp/usr/servers/defaultServer/cfgfeatures.xml
        echo $'\t'$'\t'\<feature\>clusterMember-1.0\</feature\> >>  /opt/ibm/wlp/usr/servers/defaultServer/cfgfeatures.xml
        echo $'\t'$'\t'\<feature\>scalingMember-1.0\</feature\> >>  /opt/ibm/wlp/usr/servers/defaultServer/cfgfeatures.xml
        echo $'\t'\</featureManager\> >> /opt/ibm/wlp/usr/servers/defaultServer/cfgfeatures.xml
        echo \</server\> >> /opt/ibm/wlp/usr/servers/defaultServer/cfgfeatures.xml
        echo \<?xml version=\"1.0\" encoding=\"UTF-8\" ?\> > /opt/ibm/wlp/usr/servers/defaultServer/cluster-config.xml
        echo \<server\> >> /opt/ibm/wlp/usr/servers/defaultServer/cluster-config.xml
        echo $'\t'\<clusterMember name=\"$clusterName\" /\> >> /opt/ibm/wlp/usr/servers/defaultServer/cluster-config.xml
        echo \</server\> >> /opt/ibm/wlp/usr/servers/defaultServer/cluster-config.xml
    else
        echo "No clusterName provided, the container will not be configured as a cluster or scaling member."
    fi


    # Move config snippets to the proper location for consumption

    mkdir -p /opt/ibm/wlp/usr/servers/defaultServer/configDropins/overrides
    mv /opt/ibm/wlp/usr/servers/defaultServer/c*.xml /opt/ibm/wlp/usr/servers/defaultServer/configDropins/overrides
    if [ -f /opt/ibm/wlp/usr/servers/defaultServer/user-collective-include.xml ]
    then
        cp /opt/ibm/wlp/usr/servers/defaultServer/user-collective-include.xml /opt/ibm/wlp/usr/servers/defaultServer/configDropins/overrides
    fi
else
    # At least one required parameter was missing,
    # notify the user of 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 Script

Docker 映像檔 removeMember Script 可將 Docker 儲存器中的成員伺服器從群體移除:
#!/bin/bash

# Script to remove a Liberty 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 - hostname of the Docker host this container resides on
#
#

# 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

    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

    /opt/ibm/wlp/bin/collective remove defaultServer --host=$controllerHost --port=$controllerPort --user=$controllerUser --password=$controllerPassword  --hostName=$dockerHost --autoAcceptCertificates

else
    # At least one required parameter was missing,
    # notify the user of 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

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