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$ yum install zookeeper

# cat /etc/init.d/zookeeper 
#!bin/bash
#
# zookeeper Startup Script
#
# chkconfig: 345 90 14
# description: Zookeeper Application Startup Script

# Source function library
. /etc/rc.d/init.d/functions

#-------------------------------------------------------------------------------

start() {
	echo -n $"Starting Zookeeper: "
	/usr/lib/zookeeper/bin/zkServer.sh start
	RETVAL=$?
	echo
	[ $RETVAL -eq 0 ] && echo "[ OK ]"
}

stop() {
	echo -n $"Stopping Zookeeper: "
	/usr/lib/zookeeper/bin/zkServer.sh stop
	RETVAL=$?
	echo
	[ $RETVAL -eq 0 ] && echo "[ OK ]"
}

restart() {
	stop
	start
}

case "$1" in
  start)
	start
	;;
  stop) 
	stop
	;;
  restart|force-reload|reload)
	restart
	;;
  status)
	/usr/lib/zookeeper/bin/zkServer.sh status
	RETVAL=$?
	;;
  *)
	echo $"Usage: $0 {start|stop|status|restart|reload|force-reload}"
	exit 1
esac

exit $RETVAL

a) Import the GPG Key (Required once, common for all the packages)
	$ rpm --import https://github.com/Comcast/tr1d1um/releases/download/0.0.1-65/RPM-GPG-KEY-comcast-webpa
b) Install the packages
	$ rpm -Uvh https://github.com/Comcast/scytale/releases/download/0.1.1-83/scytale-0.1.1-83.el6.x86_64.rpm
	$ rpm -Uvh https://github.com/Comcast/talaria/releases/download/0.1.1-153/talaria-0.1.1-153.el6.x86_64.rpm
	$ rpm -Uvh https://github.com/Comcast/tr1d1um/releases/download/0.1.1-228/tr1d1um-0.1.1-228.el6.x86_64.rpm
Note: Change version number for downloading the required package.

$ sudo yum install golang

$ wget -c https://github.com/Masterminds/glide/releases/download/v0.13.1/glide-v0.13.1-linux-amd64.tar.gz
$ tar -xzf glide-v0.13.1-linux-amd64.tar.gz -C /opt
$ echo "export PATH=$PATH:/opt/linux-amd64/" >> $HOME/.bash_profile

1. create a directory in $HOME say webpa_modules
$ mkdir $HOME/webpa_modules && cd $HOME/webpa_modules

2. Checkout the components from GitHub repository.
$ git clone https://github.com/Comcast/talaria.git
$ git clone https://github.com/Comcast/scytale.git
$ git clone https://github.com/Comcast/tr1d1um.git

1. Set the GOPATH & change to the source directory, e.g.
	$ export GOPATH=$HOME/webpa_modules/petasos/
	$ cd $HOME/webpa_modules/petasos/src/petasos

2. Resolve package dependencies using glide.
	$ glide install --strip-vendor

3. Build the component from source
	$ go build petasos

4. Create the package
	$ mkdir $HOME/rpmbuild
	$ ./build_rpm.sh --no-sign

5. Install the locally built webPA component package
e.g. $ cd /root/rpmbuild/RPMS/x86_64/
     $ rpm -Uvh petasos-0.1.1-87.el6.x86_64.rpm

	If the script terminates with "error: Bad owner/group: /root/webpa_modules/petasos/petasos.spec"

	change the ownership to match current user name

	$ chown root.root petasos.spec

In a production environment, webPA server components & requesting applications use SAT as a bearer token for AUTHZ and AUTHN. SAT stands for Service Access Token. As the name implies, it is used by the calling applications to request access to CPE API's. From a implementation point of view, A SAT is a Json Web Token which if shortened to "jwt". It is a base64 encoded strings of pre-defined bytes with 3 distinct parts separated by a period.

1. Using openssl command to generate the base64 encoded token.
[root@webpa-node1 ~]# openssl enc -base64 <<< "webpa@1234567890"
[OUTPUT] : d2VicGFAMTIzNDU2Nzg5MAo=
2. Using Linux coreutils tools to generate the base64 encoded token
[root@webpa-node1 ~]# echo "webpa@1234567890"|base64
[OUTPUT] : d2VicGFAMTIzNDU2Nzg5MAo=

{
        "port": 8080,
        "hcport": 8888,
        "pprofport": 9999,
        "discoveryClient": {
                "staticNodes": ["https://localhost:8585" ]
        },

        "log" : {
                "file"      : "talariaLog.log",
                "level"     : "DEBUG",
                "maxSize"   : 5242880,
                "maxBackup" : 3
        }
}

{
	"fqdn": "192.168.30.105",
	"server": "192.168.30.105",

	"primary": {
		"address": ":6000"
	},

	"health": {
		"address": ":6001"
	},

	"pprof": {
		"address": ":6002"
	},

	"fanout": {
		"method": "POST",
		"endpoints": ["http://192.168.30.105:8080/api/v2/device/send"],
		"authorization": "QWxhZGRpbjpPcGVuU2VzYW1l"
	},
	
	
	"log" : {
		"file"      : "stdout",
		"level"     : "DEBUG",
		"json": true
	},

	"aws": {
		"accessKey": "fake",
		"secretKey": "fake",
		"env": "fake",
		"sns": {
	                  "region": "us-east-1",
	                  "topicArn": "arn:aws:sns:us-east-1:999999999999:fake",
	                  "urlPath" : "/api/v2/aws/sns"
	        }
	},
	"authHeader": "d2VicGFAMTIzNDU2Nzg5MA=="
}

{
	"fqdn": "192.168.30.105",

	"server": "192.168.30.105",
	"version": "0.1.1-228",
	"region": "india",
	"flavor": "lab", 
	
	"primary": {
		"address": ":6003"
	},

	"health": {
		"address": ":6004",
		"logInterval": "60s",
		"options": [
			"PayloadsOverZero",
			"PayloadsOverHundred",
			"PayloadsOverThousand",
			"PayloadsOverTenThousand"
		]
	},

	"pprof": {
		"address": ":6005"
	},
	
	"metrics": {
		"address": ":8082"
	},
	
	"log": {
		"file"      : "tr1d1um.log",
		"level"     : "DEBUG",
		"maxSize"   : 52428800,
		"maxBackup" : 10,
		"json"      : true
	},

	"aws": {
		"accessKey": "fake-accessKey",
		"secretKey": "fake-secretKey",
		"env": "fake-env",
		"sns": {
			"region": "fake-region",
			"topicArn": "fake-sns-topic",
			"urlPath" : "/api/v2/aws/sns"
		}
	},

	"targetURL": "http://192.168.30.105:6000",
	"supportedServices": ["config"],
	"authHeader": "d2VicGFAMTIzNDU2Nzg5MA=="
}

vi /lib/rdk/startParodus.sh
/bin/systemctl set-environment PARODUS_CMD=" --hw-mac=$HwMac --webpa-ping-time=$PingWaitTime --webpa-interface-used=$NwInterface --webpa-url=http://192.168.30.105 --partner-id=comcast --webpa-backoff-max=9 --force-ipv4 --ssl-cert-path=$SSL_CERT_FILE"