Swestore/Lund Seminar Apr18

Slides

File:Swestore slides sem apr15.pdf

Links

General information on SweStore

Applying for storage

Applying for certificate

Installing NorduGrid Client

proxy_transfer scripts

The following script can be used in conjunction with the installed proxy_use script (installed on Platon and Alarik)

Usage:

proxy_upload [hostname] [username]

This generates a proxy certificates on your local machine and transfers it to the temp-directory on the remote resource using a unique filename.

On the remote machine:

proxy_use

This command will look in the /tmp dir for uploaded proxy_certs for your username and rename the file to the standard ARC proxy format.

proxy_upload (local machine)

#!/bin/bash

if [ $# -ne 2 ]
then
  echo "Usage: `basename $0` hostname username"
  exit $E_BADARGS
fi

proxyPath=/tmp/x509up_u$UID

echo "Generating proxy certificate."
arcproxy --proxy=$proxyPath
echo

if [ -e $proxyPath ] ; then
        echo "Found generated proxy certificate : $proxyPath"
else
        echo "Could not find any proxy certificate."
        return -1
fi

uuid=`uuidgen`

remoteProxyPath=/tmp/x509_up_$2_$uuid

echo
echo "Uploading proxy certificate to $1."
scp -p -q $proxyPath $2@$1:$remoteProxyPath

echo
echo "-------------------------------------------------------------"
echo "To use the uploaded proxy on $1, issue the"
echo "following command:"
echo
echo "proxy_use"
echo "-------------------------------------------------------------"
echo

proxy_use

#!/bin/env python

import sys, os

from datetime import datetime

tempDir = "/tmp"

def findProxyFiles():
        userName = os.environ["LOGNAME"]
        allFiles = os.listdir(tempDir)
        proxyFiles = []

        for dirEntry in allFiles:
                fullPath = os.path.join(tempDir, dirEntry)
                if os.path.isfile(fullPath):
                        if fullPath.find("x509_up_%s" % userName)!=-1:
                                proxyFiles.append(fullPath)

        return proxyFiles



if __name__ == "__main__":

        stdProxyFilename = os.path.join(tempDir, "x509up_u%s" % os.getuid())
        proxyCertExists = False

        if os.path.isfile(stdProxyFilename):
                print("Proxy certificate %s exists." % stdProxyFilename)
                proxyCertExists = True
        else:
                print("No existing proxy certificate %s found. " % stdProxyFilename)

        proxyFiles = findProxyFiles()
        proxyDict = {}

        for proxyFilename in proxyFiles:
                info = os.stat(proxyFilename)
                proxyDict[info.st_ctime] = proxyFilename

        sortedProxyKeys = proxyDict.keys()
        sortedProxyKeys.sort()
        sortedProxyKeys.reverse()

        if proxyCertExists:
                proxyCount = 1
        else:
                proxyCount = 0

        for timeStamp in sortedProxyKeys:
                if (proxyCount == 0):
                        datetime = datetime.fromtimestamp(timeStamp)
                        os.rename(proxyDict[timeStamp], stdProxyFilename)
                        print("Created %s from uploaded proxy %s." % (stdProxyFilename, proxyDict[timeStamp]))
                else:
                        print("Removing old uploaded proxy %s." % proxyDict[timeStamp])
                        os.remove(proxyDict[timeStamp])
                proxyCount += 1

        if len(proxyFiles) == 0:
                print("No uploaded proxy files found. Please upload proxy files using proxy_upload.")