Erlang - Ejabberd join_cluster Error: {no_ping ...} - amazon-web-services

Question

Hi I have been trying to set up an ejabberd cluster.
However on trying to join from node2 to node1 , i get an error saying
On node 2:
# ejabberdctl join_cluster ejabberd#<internal ip of node1>
Error: {no_ping,'ejabberd#<internal ip of node1>'}
I can clearly ping node1 from node2.
Both the node are hosted in the same region on AWS.
I have tried allowing all traffic on node 1.
Both have the same .erlang.cookie.
Not sure why i continue to get that error.
# ejabberdctl status
The node 'ejabberd#<internal ip of node1>' is started with status: started
ejabberd 16.03.107 is running in that node
# netstat -lnptu
tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 2190/epmd
tcp 0 0 0.0.0.0:5269 0.0.0.0:* LISTEN 2233/beam.smp
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 975/sshd
tcp 0 0 0.0.0.0:52189 0.0.0.0:* LISTEN 2233/beam.smp
tcp 0 0 0.0.0.0:5280 0.0.0.0:* LISTEN 2233/beam.smp
tcp 0 0 0.0.0.0:5222 0.0.0.0:* LISTEN 2233/beam.smp
tcp6 0 0 :::4369 :::* LISTEN 2190/epmd
tcp6 0 0 :::22 :::* LISTEN 975/sshd
ejabberdctl.cfg on node1 :
ERLANG_NODE=ejabberd#<internal IP of node1>
ejabberd.yml on node1:
loglevel: 4
log_rotate_size: 10485760
log_rotate_date: ""
log_rotate_count: 1
log_rate_limit: 100
hosts:
- "<external ip of node1>"
listen:
-
port: 5222
module: ejabberd_c2s
max_stanza_size: 65536
shaper: c2s_shaper
access: c2s
-
port: 5269
module: ejabberd_s2s_in
-
port: 5280
module: ejabberd_http
request_handlers:
"/websocket": ejabberd_http_ws
web_admin: true
http_bind: true
captcha: true
auth_method: internal
shaper:
normal: 1000
fast: 50000
max_fsm_queue: 1000
acl:
local:
user_regexp: ""
loopback:
ip:
- "127.0.0.0/8"
access:
max_user_sessions:
all: 10
max_user_offline_messages:
admin: 5000
all: 100
local:
local: allow
c2s:
blocked: deny
all: allow
c2s_shaper:
admin: none
all: normal
s2s_shaper:
all: fast
announce:
admin: allow
configure:
admin: allow
muc_admin:
admin: allow
muc_create:
local: allow
muc:
all: allow
pubsub_createnode:
local: allow
register:
all: allow
trusted_network:
loopback: allow
language: "en"
modules:
mod_adhoc: {}
mod_announce: # recommends mod_adhoc
access: announce
mod_blocking: {} # requires mod_privacy
mod_caps: {}
mod_carboncopy: {}
mod_client_state: {}
mod_configure: {} # requires mod_adhoc
mod_disco: {}
mod_irc: {}
mod_http_bind: {}
mod_last: {}
mod_muc:
host: "conference.#HOST#"
access: muc
access_create: muc_create
access_persistent: muc_create
access_admin: muc_admin
mod_muc_admin: {}
mod_offline:
access_max_user_messages: max_user_offline_messages
mod_ping: {}
mod_privacy: {}
mod_private: {}
mod_pubsub:
access_createnode: pubsub_createnode
ignore_pep_from_offline: true
last_item_cache: false
plugins:
- "flat"
- "hometree"
- "pep" # pep requires mod_caps
mod_roster: {}
mod_shared_roster: {}
mod_stats: {}
mod_time: {}
mod_vcard:
search: false
mod_version: {}
allow_contrib_modules: true

Answer 1

I faced the same issue while setting up Ejabberd cluster on EC2. Here solution for reference.
Make sure following ports are open on internal/private network
5222 - xmpp client connection
5280 - web portal
4369 - EPMD
5269 - S2S
4200 - 4210 node communication
Also allow internal ping (icmp packets) just in case.
Next set FIREWALL_WINDOW option in ejabberdctl.cfg file as follows. This will set Erlang use a defined range of port instead of dynamic
ports for node communication. (refer ejabberdctl.cfg)
FIREWALL_WINDOW=4200-4210
And use full node names for you Ejabberd nodes eg: ejabberd#srv1.example.com

Answer 2

it seems you are missing configration in ejabberdctl.cfg change the following line in your ejabberdctl.cfg file-
#INET_DIST_INTERFACE=127.0.0.1 to
INET_DIST_INTERFACE=104.10.120.122 (whatever your host public ip)
and open erlang console and run the following command-
net_adm:ping('ejabberd#ejabberd1'). # your node
if it will return pong now you can do cluster between ejabberd nodes.
run the following command to make cluster-
ejabberdctl join_cluster 'ejabberd#ejabberd1'

Answer 3

Frist, #Uday Sawant's method is mandatory.
and also you should add each node info into /etc/hosts
for example, if your nodes are
ejabberd#node1
ejabberd#node2
set these to host file for two systems.
for os,
add your ejabbered node hostname
vi /etc/hosts
...
node1 10.0.100.1
node2 10.0.100.2
for erlang
vi $HOME/.hosts.erlang
'node1'.
'node2'.
host file for ejabberd