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Defaultgw charm

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README.ex 0 → 100644
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# Overview
This charm set default gateway in /etc/network/interfaces.
It is a subordinate charm.
# Usage
Step by step instructions on using the charm:
juju deploy servicename
juju add-relation defaultgw servicename
## Known Limitations and Issues
This not only helps users but gives people a place to start if they want to help you add features to your charm.
# Configuration
# Contact Information
Consortium GARR
cloud-support@garr.it
config.yaml 0 → 100644
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options:
gateway:
type: string
default: ""
description: "Default gateway in /etc/network/interfaces. E.g.: 10.10.10.1/24"
hooks/config-changed 0 → 100644
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#!/bin/bash
# config-changed occurs everytime a new configuration value is updated (juju set)
set -e
hooks/install
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#!/bin/bash
# Here do anything needed to install the service
# i.e. apt-get install -y foo or bzr branch http://myserver/mycode /srv/webroot
# Make sure this hook exits cleanly and is idempotent, common problems here are
# failing to account for a debconf question on a dependency, or trying to pull
# from github without installing git first.
set -e
status-set maintenance "Changing Default gateway"
GATEWAY="$(config-get gateway)"
OLD_GATEWAY_IP=`cat /etc/network/interfaces | grep gateway | awk '{print $2}'`
GATEWAY_IP=`echo "$GATEWAY" | awk -F "/" {'print $1'}`
if [ -z "$GATEWAY" ]; then
juju-log "Gateway option is empty. Exiting..."
status-set active "Unit is ready. Gateway IP option empty"
exit 0
fi
if [ "$GATEWAY_IP" == "$OLD_GATEWAY_IP" ]; then
juju-log "Default gateway is already set. Exiting..."
status-set active "Unit is ready. Gateway ok"
exit 0
fi
apt-get install -y sipcalc
GATEWAY_NET=`sipcalc $GATEWAY | grep "Network address" | awk '{print $4}'`
old_IFS=$IFS
IFS=$'\n'
LINE=0
for INTERFACE in $(cat -n /etc/network/interfaces | grep address);
do
ADDRESS=`echo $INTERFACE | awk '{ print $3}'`
ADDRESS_NET=`sipcalc $ADDRESS | grep "Network address" | awk '{print $4}'`
if [ "$ADDRESS_NET" == "$GATEWAY_NET" ]; then
LINE=`echo $INTERFACE | awk '{ print $1}'`
fi
done
IFS=$old_IFS
if [ "$LINE" -gt 0 ]; then
juju-log "Default gateway $GATEWAY_IP is setting..."
sed -i "${LINE}i\ gateway $GATEWAY_IP" /etc/network/interfaces
if [ ! -z "$OLD_GATEWAY_IP" ]; then
juju-log "Old default gateway $OLD_GATEWAY_IP removing..."
sed -i "/${OLD_GATEWAY_IP}/d" /etc/network/interfaces
fi
ip route del default
ip route add default via $GATEWAY_IP
juju-log "Default gateway changed"
else
juju-log "Network not found. Exiting..."
status-set active "Unit is ready. Incorrect gateway IP"
exit 0
fi
status-set active "Unit is ready. Gateway ok"
icon.svg 0 → 100644
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metadata.yaml 0 → 100644
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subordinate: true
name: defaultgw
summary: This charm set default gateway in /etc/network/interfaces
maintainer: gianni.marzulli@garr.it
description: |
This charm set default gateway in /etc/network/interfaces
tags:
- network
series:
- xenial
- trusty
requires:
juju-info:
interface: juju-info
scope: container
revision 0 → 100644
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