Linux Firewall for Docker Swarm on CentOS 7

Firewalld

firewall-cmd --add-port=2376/tcp --permanent
firewall-cmd --add-port=2377/tcp --permanent
firewall-cmd --add-port=7946/tcp --permanent
firewall-cmd --add-port=7946/udp --permanent
firewall-cmd --add-port=4789/udp --permanent
firewall-cmd --reload
systemctl restart docker
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GlusterFS

commands

sudo yum install centos-release-gluster312.noarch
sudo yum install glusterfs gluster-cli glusterfs-libs glusterfs-server
sudo mkdir /home/glusterfs
sudo chown <user>:<user group> /home/glusterfs
sudo gluster peer probe swarm-manager01.yourdomain.com
sudo service enable gluster.service
sudo systemctl enable gluster.service
sudo systemctl enable glusterd.service
sudo systemctl start glusterd
sudo systemctl status glusterd
sudo systemctl enable glusterd.service
sudo systemctl start glusterd.service
sudo gluster peer probe swarm-manager02.yourdomain.com
sudo gluster peer probe swarm-manager03.yourdomain.com
sudo gluster peer probe swarm-manager01.yourdomain.com
sudo gluster peer probe swarm-node01.yourdomain.com
sudo gluster peer probe swarm-node02.yourdomain.com
sudo gluster peer probe swarm-worker02.yourdomain.com
sudo gluster peer probe swarm-worker01.yourdomain.com
sudo gluster peer status
gluster volume create gfs replica 3 swarm-manager01.yourdomain.com:/home/glusterfs swarm-manager02.yourdomain.com:/home/glusterfs swarm-worker01.yourdomain.com:/home/glusterfs gluster volume create gfs replica 5 swarm-manager01.yourdomain.com:/home/glusterfs swarm-manager02.yourdomain.com:/home/glusterfs swarm-worker01.yourdomain.com:/home/glusterfs \
sudo gluster volume create gfs replica 5 swarm-manager01.yourdomain.com:/home/glusterfs swarm-manager02.yourdomain.com:/home/glusterfs swarm-worker01.yourdomain.com:/home/glusterfs swarm-worker02.yourdomain.com:/home/glusterfs
sudo gluster volume create gfs replica 3 swarm-manager01.yourdomain.com:/home/glusterfs swarm-manager02.yourdomain.com:/home/glusterfs swarm-worker01.yourdomain.com:/home/glusterfs swarm-worker02.yourdomain.com:/home/glusterfs
sudo gluster volume create gfs replica 5 swarm-manager03.yourdomain.com/home/glusterfs swarm-manager01.yourdomain.com:/home/glusterfs swarm-manager02.yourdomain.com:/home/glusterfs swarm-worker01.yourdomain.com:/home/glusterfs swarm-worker02.yourdomain.com:/home/glusterfs
mkdir -p /home/glusterfs/1/brick
sudo gluster volume create gfs replica 5 swarm-manager03.yourdomain.com/home/glusterfs/1/brick swarm-manager01.yourdomain.com:/home/glusterfs/3/brick swarm-manager02.yourdomain.com:/home/glusterfs/2/brick swarm-worker01.yourdomain.com:/home/glusterfs/4/brick swarm-worker02.yourdomain.com:/home/glusterfs/brick
sudo gluster volume create gfs replica 5 swarm-manager03.yourdomain.com:/home/glusterfs/1/brick swarm-manager01.yourdomain.com:/home/glusterfs/3/brick swarm-manager02.yourdomain.com:/home/glusterfs/2/brick swarm-worker01.yourdomain.com:/home/glusterfs/4/brick swarm-worker02.yourdomain.com:/home/glusterfs/brick
sudo gluster volume create gfs replica 5 swarm-manager03.yourdomain.com:/home/glusterfs/1/brick swarm-manager01.yourdomain.com:/home/glusterfs/3/brick swarm-manager02.yourdomain.com:/home/glusterfs/2/brick swarm-worker01.yourdomain.com:/home/glusterfs/4/brick swarm-worker02.yourdomain.com:/home/glusterfs/brick
sudo gluster volume create gfs replica 5 swarm-manager03.yourdomain.com:/home/glusterfs/1/brick swarm-manager01.yourdomain.com:/home/glusterfs/3/brick swarm-manager02.yourdomain.com:/home/glusterfs/2/brick swarm-worker01.yourdomain.com:/home/glusterfs/4/brick swarm-worker02.yourdomain.com:/home/glusterfs/brick force
sudo gluster list
sudo gluster volume list
sudo gluster start gfs
sudo gluster volume start gfs
sudo gluster volume status gfs
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Apache Proxy Balancer

Enable proxy models

sudo a2enmod proxy_html
sudo a2enmod proxy_http
sudo a2enmod proxy_wstunnel
sudo a2enmod proxy_ajp
sudo a2enmod lbmethod_byrequests
sudo a2enmod lbmethod_bytraffic
sudo a2enmod lbmethod_bybusyness
sudo a2enmod lbmethod_heartbeat
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Create a MongoDB Replica Set

Create 3 mongodb servers. Make sure update hosts files on all nodes or on DNS server

192.168.1.10 mongodb01
192.168.1.11 mongodb02
192.168.1.12 mongodb03
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Backup LXD Container as Tarball

Backup

lxc snapshot <container name> backup
lxc publish <container name>/backup --alias <container name>-backup
lxc image export <container name>-backup lxd_<container name>_tarball
lxc image delete <container name>-backup
lxc delete <container name>/backup
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