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Support injection of more env vars #24

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Support injection of more env vars #24

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10 changes: 7 additions & 3 deletions docker-keepalived/keepalived.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -19,11 +19,11 @@
}

vrrp_instance lb-vips {
state BACKUP
state {{STATE}}
interface {{INTERFACE}}
virtual_router_id {{VRID}}
priority 100
advert_int 1
priority {{PRIORITY}}
advert_int {{ADVERT_INT}}
nopreempt #Prevent fail-back
track_script {
chk_haproxy
Expand All @@ -35,4 +35,8 @@
virtual_ipaddress {
{{VIRTUAL_IP}}/{{VIRTUAL_MASK}} dev {{INTERFACE}}
}
unicast_src_ip {{UNICAST_SRC_IP}}
unicast_peer {
{{UNICAST_PEERS}}
}
}
42 changes: 38 additions & 4 deletions docker-keepalived/keepalived.sh
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -9,12 +9,48 @@ if [[ -z ${CHECK_SCRIPT} ]]; then
fi
fi

validate-ip ()
{
if ! [[ $1 =~ ^(([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-2][0-3])\.)(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-5][0-5])\.){2}([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-5][0-5])$ ]]; then
echo "The $2 environment variable is null or not a valid IP address, exiting..."
exit 1
fi
}

# Substitute variables in config file.
/bin/sed -i "s/{{VIRTUAL_IP}}/${VIRTUAL_IP}/g" /etc/keepalived/keepalived.conf
if [[ -z ${STATE} ]]; then
/bin/sed -i "s/{{STATE}}/BACKUP/g" /etc/keepalived/keepalived.conf
else
/bin/sed -i "s/{{STATE}}/${STATE}/g" /etc/keepalived/keepalived.conf
fi
if [[ -z ${PRIORITY} ]]; then
/bin/sed -i "s/{{PRIORITY}}/100/g" /etc/keepalived/keepalived.conf
else
/bin/sed -i "s/{{PRIORITY}}/${PRIORITY}/g" /etc/keepalived/keepalived.conf
fi

if [[ -z ${ADVERT_INT} ]]; then
/bin/sed -i "s/{{ADVERT_INT}}/1/g" /etc/keepalived/keepalived.conf
else
/bin/sed -i "s/{{ADVERT_INT}}/${ADVERT_INT}/g" /etc/keepalived/keepalived.conf
fi

/bin/sed -i "s/{{VIRTUAL_MASK}}/${VIRTUAL_MASK}/g" /etc/keepalived/keepalived.conf
/bin/sed -i "s/{{CHECK_SCRIPT}}/${CHECK_SCRIPT}/g" /etc/keepalived/keepalived.conf
/bin/sed -i "s/{{VRID}}/${VRID}/g" /etc/keepalived/keepalived.conf
/bin/sed -i "s/{{INTERFACE}}/${INTERFACE}/g" /etc/keepalived/keepalived.conf
if [[ -z ${UNICAST_SRC_IP} ]]; then
/bin/sed -i "/unicast_src_ip/d" /etc/keepalived/keepalived.conf
else
/bin/sed -i "s/{{UNICAST_SRC_IP}}/${UNICAST_SRC_IP}/g" /etc/keepalived/keepalived.conf
fi
# unicast peers
for peer in ${UNICAST_PEERS}; do
validate-ip ${peer} 'UNICAST_PEERS'
/bin/sed -i "s/{{UNICAST_PEERS}}/${peer}\n {{UNICAST_PEERS}}/g" /etc/keepalived/keepalived.conf
done
/bin/sed -i "/{{UNICAST_PEERS}}/d" /etc/keepalived/keepalived.conf

# Make sure we react to these signals by running stop() when we see them - for clean shutdown
# And then exiting
Expand All @@ -38,10 +74,8 @@ stop()

# Make sure the variables we need to run are populated and (roughly) valid

if ! [[ $VIRTUAL_IP =~ ^(([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-2][0-3])\.)(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-5][0-5])\.){2}([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-5][0-5])$ ]]; then
echo "The VIRTUAL_IP environment variable is null or not a valid IP address, exiting..."
exit 1
fi
validate-ip $VIRTUAL_IP 'VIRTUAL_IP'


if ! [[ $VIRTUAL_MASK =~ ^([0-9]|[1-2][0-9]|3[0-2])$ ]]; then
echo "The VIRTUAL_MASK environment variable is null or not a valid subnet mask, exiting..."
Expand Down