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eucarc EC2 settings

eucarc creates EC2 credentials for the current user as defined by OS_TENANT_NAME:OS_USERNAME. eucarc sources openrc at the beginning (which in turn sources stackrc and localrc) in order to set credentials to create EC2 credentials in Keystone.

EC2_URL
Set the EC2 url for euca2ools. The endpoint is extracted from the service catalog for OS_TENANT_NAME:OS_USERNAME. 
EC2_URL=$(keystone catalog --service ec2 | awk '/ publicURL / { print $4 }')
S3_URL
Set the S3 endpoint for euca2ools. The endpoint is extracted from the service catalog for OS_TENANT_NAME:OS_USERNAME. 
export S3_URL=$(keystone catalog --service s3 | awk '/ publicURL / { print $4 }')
EC2_ACCESS_KEY, EC2_SECRET_KEY
Create EC2 credentials for the current tenant:user in Keystone. 
CREDS=$(keystone ec2-credentials-create)
export EC2_ACCESS_KEY=$(echo "$CREDS" | awk '/ access / { print $4 }')
export EC2_SECRET_KEY=$(echo "$CREDS" | awk '/ secret / { print $4 }')
Certificates for Bundling
Euca2ools requires certificate files to enable bundle uploading. The exercise script exercises/bundle.sh demonstrated retrieving certificates using the Nova CLI. 
EC2_PRIVATE_KEY=pk.pem
EC2_CERT=cert.pem
NOVA_CERT=cacert.pem
EUCALYPTUS_CERT=${NOVA_CERT}

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