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‎README.md

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[![Docker](https://github.com/RootShell-coder/swarm-keepalived/actions/workflows/docker-publish.yml/badge.svg)](https://github.com/RootShell-coder/swarm-keepalived/actions/workflows/docker-publish.yml)
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[Keepalived for Linux - Version 2.2.8 - Release Notes - May 31, 2023](https://www.keepalived.org/software/keepalived-2.2.8.tar.gz)
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Update VERSION 2.3.1
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## keepalived v 2.2.8 configure flags
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[Keepalived for Linux ](https://www.keepalived.org/download.html)
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## keepalived configure flags
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* disable-dynamic-linking
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* prefix=/usr

‎docker/Dockerfile

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FROM alpine:latest AS build
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ENV VERSION=2.3.1
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WORKDIR /tmp
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ADD https://keepalived.org/software/keepalived-2.2.8.tar.gz .
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ADD https://keepalived.org/software/keepalived-$VERSION.tar.gz .
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RUN set eux; \
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addgroup -S keepalived_script; \
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pcre2-dev \
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autoconf \
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automake; \
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tar xvzf keepalived-2.2.8.tar.gz; \
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cd /tmp/keepalived-2.2.8/; \
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tar xvzf keepalived-$VERSION.tar.gz; \
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cd /tmp/keepalived-$VERSION/; \
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./autogen.sh; \
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./configure \
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--disable-dynamic-linking \
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make install; \
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strip /usr/sbin/keepalived; \
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cd -; \
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rm -rf /tmp/keepalived-2.2.8; \
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rm -rf /tmp/keepalived-$VERSION; \
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apk --no-cache del \
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binutils \
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file-dev \
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VOLUME /etc/keepalived/
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ENTRYPOINT ["entrypoint"]
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CMD ["sudo", "/usr/sbin/keepalived", "--dont-fork", "--log-console", "--use-file", "/etc/keepalived/keepalived.conf"]
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‎docker/entrypoint

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sed -i "s!{{KEEPALIVED_VIRTUAL_ROUTER_ID}}!${KEEPALIVED_VIRTUAL_ROUTER_ID}!g" ${KEEPALIVED_CONF}
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sed -i "s!{{KEEPALIVED_PRIORITY}}!${KEEPALIVED_PRIORITY}!g" ${KEEPALIVED_CONF}
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sed -i "s!{{KEEPALIVED_UNICAST_SRC_IP}}!${KEEPALIVED_UNICAST_SRC_IP}!g" ${KEEPALIVED_CONF}
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sed -i "s!{{DST_NETWORK}}!${DST_NETWORK}!g" ${KEEPALIVED_CONF}
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UNICAST_PEER=$(echo $KEEPALIVED_UNICAST_PEER | sed "s/\s//g" | sed "s/,/ /g")
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for up in ${UNICAST_PEER[@]}; do
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sed -i "s!{{KEEPALIVED_AUTH_PASS}}!${KEEPALIVED_AUTH_PASS}!g" ${KEEPALIVED_CONF}
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# VIRTUAL ROUTES (add default gateway)
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if [[ -n "${DEFAULT_GATEWAY}" ]]; then
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sed -i 's/^#VR//' ${KEEPALIVED_CONF}
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sed -i "s!{{DEFAULT_GATEWAY}}!${DEFAULT_GATEWAY}!g" ${KEEPALIVED_CONF}
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fi
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exec "$@"

‎docker/keepalived.conf

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global_defs {
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default_interface {{KEEPALIVED_INTERFACE}}
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}
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vrrp_instance VI_1 {
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interface {{KEEPALIVED_INTERFACE}}
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state BACKUP
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virtual_router_id {{KEEPALIVED_VIRTUAL_ROUTER_ID}}
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priority {{KEEPALIVED_PRIORITY}}
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nopreempt
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{{KEEPALIVED_UNICAST_PEER}}
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}
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virtual_ipaddress {
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{{KEEPALIVED_VIRTUAL_IPADDRESS}} dev agge label agge:0
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{{KEEPALIVED_VIRTUAL_IPADDRESS}} dev {{KEEPALIVED_INTERFACE}} label {{KEEPALIVED_INTERFACE}}:0
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}
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authentication {
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auth_type PASS
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auth_pass {{KEEPALIVED_AUTH_PASS}}
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}
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#VR virtual_routes {
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#VR 0.0.0.0/0 via {{DEFAULT_GATEWAY}} dev {{KEEPALIVED_INTERFACE}} onlink
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#VR }
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}

‎example/docker-compose.yml_route_default.md

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# Default route
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Default Gateway is a device on the network (usually a router) that serves as an output point for data packets addressed to other networks. It is used when a computer or other network device cannot find a more specific route for data transmission. In this case, the devices send data via the default gateway.
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Enable default gateway
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If you transfer the `DEFAULT_GATEWAY` variable to docker-compose.yml this will add a default route to the routing table
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```json
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virtual_routes {
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0.0.0.0/0 via {{DEFAULT_GATEWAY}} dev {{KEEPALIVED_INTERFACE}} onlink
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}
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```
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Interface enp3s0
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```bash
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ip a s enp3s0
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2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
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link/ether 52:54:00:13:5a:a2 brd ff:ff:ff:ff:ff:ff
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inet 192.168.10.2/24 brd 192.168.10.255 scope global enp3s0
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valid_lft forever preferred_lft forever
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inet 108.177.16.24/27 scope global enp3s0:0
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valid_lft forever preferred_lft forever
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inet6 fe80::5054:ff:fe13:5aa2/64 scope link
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valid_lft forever preferred_lft forever
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```
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route
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```bash
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routel
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Dst Gateway Prefsrc Protocol Scope Dev Table
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default 108.177.16.1 keepalived enp3s0
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108.177.16.0/27 108.177.16.24 kernel link enp3s0
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192.168.10.0/24 192.168.10.2 kernel link enp3s0
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108.177.16.24 108.177.16.24 kernel host enp3s0 local
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108.177.16.31 108.177.16.24 kernel link enp3s0 local
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127.0.0.0/8 127.0.0.1 kernel host lo local
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127.0.0.1 127.0.0.1 kernel host lo local
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127.255.255.255 127.0.0.1 kernel link lo local
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192.168.10.2 192.168.10.2 kernel host enp3s0 local
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192.168.10.255 192.168.10.2 kernel link enp3s0 local
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```
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docker-compose.yml
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```yml
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---
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services:
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master:
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image: keepalived:latest
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environment:
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DAFAULT_GATEWAY: "108.177.16.1"
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KEEPALIVED_UNICAST_SRC_IP: "192.168.10.2"
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KEEPALIVED_UNICAST_PEER: "192.168.10.3"
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KEEPALIVED_VIRTUAL_IPADDRESS: "108.177.16.24/27"
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KEEPALIVED_PRIORITY: "200"
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KEEPALIVED_INTERFACE: "enp3s0"
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network_mode: host
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restart: always
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cap_add:
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- NET_ADMIN
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- NET_BROADCAST
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- NET_RAW
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```
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```asci
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.-~~~-.
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.- ~ ~-( )_ _
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/ ~ -.
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| ',
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\ .'
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~- ._ ,. ,.,.,.,., .-~
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|
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----------------
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| 108.177.16.1 |
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----------------
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master / gateway \ slave
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enp3s0 / \ eth0
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---------------------- -----------------------
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| vrrp 108.177.16.24 | | vrrp ---.---.---.--- |
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| IP 192.168.10.2 | | IP 192.168.10.3 |
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---------------------- ------------------------
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docker | | docker
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----------unicast----------
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```

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