#!/bin/bash
# IBM(c) 2013 EPL license http://www.eclipse.org/legal/epl-v10.html


#-------------------------------------------------------------------------------
#=head1  config_chef_workstation
#=head2  This command configures the chef workstation on a xCAT node.
#        It is used by install_chef_workstation on Ubuntu and chef kit on RH.
#=cut
#-------------------------------------------------------------------------------
HOME='/root/'
export HOME

node=`hostname`

uselocalhost=0
# Who is the chef server?
# -s takes precedence
# then site.chefserver
# then site.master
ARGNUM=$#;
if [ $ARGNUM -gt 1 ]; then
    if [ $1 = "-s" ]; then
        chefserver=$2
    fi
fi

if [ -z "$chefserver" ]
then
    if [ -n "$CFGSERVER" -a -n "$CFGMGR" ]; then
        if [ $CFGMGR = "chef" ]; then
            chefserver=$CFGSERVER
        fi
    fi
    if [ -z "$chefserver" ]
    then
        chefserver=$CHEFSERVER
    fi
    if [ -z "$chefserver" ]
    then
        chefserver=$MASTER
    fi
fi

if [ -z "$chefserver" ]
then
    # No chef server defined, using localhost is the only choice
    uselocalhost=1
fi

localip=`getent hosts \`hostname\` | awk '{print $1}'`
serverip=`getent hosts $chefserver | awk '{print $1}'`

if [ "$localip" = "$serverip" ]
then
    uselocalhost=1
fi

# check if the current node is also a chef master
# if yes, use this node as the chef server
if [ -f /etc/chef-server/admin.pem ]; then
    uselocalhost=1
fi

homedir=$HOME
# In prereboot, the HOME is /tmp
# assume root
if [ "$homedir" = "/tmp" ] || [ -z "$homedir" ]
then
    homedir=/root
fi
# Reconfigure the ~/.chef
rm -rf $homedir/.chef.bak >/dev/null 2>&1
mv $homedir/.chef $homedir/.chef.bak >/dev/null 2>&1
mkdir $homedir/.chef

if [ $uselocalhost = 1  ]
then
    chefserver=$localip
    client_key='/etc/chef-server/admin.pem'
    validation_key='/etc/chef-server/chef-validator.pem'
else
    # Remote chef-server
    #scp $chefserver:/etc/chef-server/admin.pem $homedir/.chef 2>&1 1>/dev/null
    #scp $chefserver:/etc/chef-server/chef-validator.pem $homedir/.chef 2>&1 1>/dev/null
    mkdir -p /etc/chef
    mkdir -p /etc/chef-server_tmp

    mount $chef_server:/etc/chef-server /etc/chef-server_tmp
    if [ $? -ne 0 ]
    then
        errmsg="Failed to run 'mount $chef_server:/etc/chef-server /etc/chef-server_tmp' on $node"
        logger -t xcat -p local4.err $errmsg
        echo $errmsg
        exit 1
    fi
    cp /etc/chef-server_tmp/admin.pem $homedir/.chef 2>&1 1>/dev/null
    cp /etc/chef-server_tmp/chef-validator.pem $homedir/.chef 2>&1 1>/dev/null
    umount /etc/chef-server_tmp
    rmdir /etc/chef-server_tmp
    if [ ! -e "$homedir/.chef/admin.pem" ] || [ ! -e "$homedir/.chef/chef-validator.pem" ]
    then
        errmsg="Could not get the chef keys from chef server $chefserver"
        logger -t xcat -p local4.err $errmsg
        echo $errmsg
        exit 1
    fi
fi

echo -e "log_level                :info
log_location             STDOUT
node_name                'admin'
client_key               '$client_key'
validation_client_name   'chef-validator'
validation_key           '$validation_key'
chef_server_url          'https://$chefserver'" > $homedir/.chef/knife.rb

# Verify the configuration
knife client list
if [ $? -ne 0 ]
then
    errmsg="Failed to onfigure chef worktation on $node"
    logger -t xcat -p local4.err $errmsg
    echo $errmsg
    exit 1
fi

exit 0