FlexLB API Server

Flexible load balancer API server to control keepalived and haproxy

Build

Clone code

git clone https://github.com/flexlet/flexlb.git

Build binary

For Linux

cd flexlb

# edit build/profile to config options

# generate certs
sh build/gencrt.sh

# build tarball
sh build/build.sh

Run

Install and start Keepalived

For EulerOS 2.9

rpm -ivh net-snmp-5.8-8.h6.eulerosv2r9.x86_64.rpm  net-snmp-libs-5.8-8.h6.eulerosv2r9.x86_64.rpm
rpm -ivh keepalived-2.0.20-16.h5.eulerosv2r9.x86_64.rpm
systemctl enable keepalived
systemctl start keepalived

Install HAProxy

For EulerOS 2.9

rpm -ivh haproxy-2.0.14-1.eulerosv2r9.x86_64.rpm

Run FlexLB API server

# copy and extract tarbal
mkdir flexlb-<version> && cd flexlb-<version>
tar -zxf ../flexlb-<version>.tar.gz

# check install options
sh install.sh -h

# install
sh install.sh [options]

Test

Prepare backend servers

For example, create 3 nginx server:

192.168.1.141:30080
192.168.1.142:30080
192.168.1.143:30080

Prepare instance config template

Prepare instance config for API post, for example:

hack/instance_template.json

Test instance create, list, modify, get, start, stop, delete

# get ready status
sh get_status.sh

# create instances
sh create_instance.sh inst1 192.168.2.1
sh create_instance.sh inst2 192.168.2.2

# list instances
sh list_instances.sh
sh list_instances.sh inst1

# modify instance
# edit instance_template.json to add or remove backend servers
sh modify_instance.sh inst1 192.168.2.3

# show instance changes
sh get_instance.sh inst1

# stop & start instance
sh stop_instance.sh inst1
sh start_instance.sh inst1

# delete instances
sh delete_instance.sh inst1
sh delete_instance.sh inst2