The simple step for use opengnb systemd:

In machine A:

1. cd /etc/opengnb/default/security
gnb_crypto -c -p 1001.private -k 1001.public

2. cp 1001.public ../ed25519/

3. scp 1001.public B:/etc/opengnb/default/ed25519/

In machine B:

1. cd /etc/opengnb/default/security
gnb_crypto -c -p 1002.private -k 1002.public

2. cp 1002.public ../ed25519/

3. scp 1002.public A:/etc/opengnb/default/ed25519/

4. update /etc/opengnb/default/node.conf, set nodeid=1002

At last run in machine A and machine B:

systemctl restart opengnb

enjoy!
