Hello,
Today, my new adventure. RocketChat in nomad.
RocketChat needs mongo with replicaset to work.
This is the official docker-compose:
https://raw.githubusercontent.com/RocketChat/Rocket.Chat/develop/docker-compose.yml
That I understand about steps to boot.
1/ Mongo boots with command mongod --smallfiles --oplogSize 128 --replSet rs0 --storageEngine=mmapv1
2/ Mongo-init-replica boots with command
bash -c
"for i in `seq 1 30`; do
mongo mongo/rocketchat --eval \"
rs.initiate({
_id: 'rs0',
members: [ { _id: 0, host: 'localhost:27017' } ]})\" &&
s=$$? && break || s=$$?;
echo \"Tried $$i times. Waiting 5 secs...\";
sleep 5;
done; (exit $$s)"
to init replica
3/ RocketChat in last, boots with
command: >
bash -c
"for i in `seq 1 30`; do
node main.js &&
s=$$? && break || s=$$?;
echo \"Tried $$i times. Waiting 5 secs...\";
sleep 5;
done; (exit $$s)"
And where I am to write the job.
job "rocketchat" {
region = "global"
datacenters = ["dc1"]
type = "service"
group "rocketchat" {
count = 1
network {
port "web" {
to = 3000
}
}
restart {
attempts = 10
interval = "5m"
delay = "25s"
mode = "delay"
}
task "rocketchat" {
driver = "docker"
lifecycle {
hook = "prestart"
sidecar = false
}
env {
PORT = "3000"
ROOT_URL = "http://localhost:3000"
MONGO_URL= "mongodb://mongo:27017/rocketchat"
MONGO_OPLOG_URL= "mongodb://mongo:27017/local"
MAIL_URL = "smtp://smtp.email"
}
config {
image = "rocketchat/rocket.chat:3.9.3"
volumes = [
"/srv/live/rocket.chat/data/uploads:/app/uploads",
]
hostname = "rocketchat.service.consul"
command = "sh"
args = ["-c", "echo -n 'Waiting for service'; until nslookup mongo-rocketchat.service.consul 2>&1 >/dev/null; do echo '.'; sleep 2; done"]
ports = ["web"]
}
service {
name = "rocketchat"
tags = [
"traefik.enable=true",
"traefik.http.routers.rocketchat.entrypoints=http",
"traefik.http.routers.rocketchat.rule=Host(`rocketchat.lan`)",
"traefik.http.routers.rocketchat.middlewares=compress",
]
port = "web"
check {
name = "rocketchat port alive"
type = "http"
path = "/"
interval = "10s"
timeout = "2s"
}
}
}
task "mongo" {
driver = "docker"
config {
image = "mongo:4.4.2"
volumes = [
"/srv/live/rocket.chat/data/runtime/db:/data/db",
"/srv/live/rocket.chat/data/dump:/dump",
]
command = "mongod"
args = "--smallfiles --oplogSize 128 --replSet rs0 --storageEngine=mmapv1"
hostname = "mongo-rocketchat.service.consul"
}
service {
name = "mongo"
tags = [
"traefik.enable=false",
]
}
}
task "mongo-init-replica" {
driver = "docker"
lifecycle {
hook = "prestart"
sidecar = false
}
config {
image = "mongo:4.4.2"
command = "/bin/bash"
args = ["-c", "for i in `seq 1 30`; do mongo mongo/rocketchat --eval \" rs.initiate({ _id: 'rs0', members: [ { _id: 0, host: 'localhost:27017' } ]})\" && s=$$? && break || s=$$?; echo \"Tried $$i times. Waiting 5 secs...\"; sleep 5; done; (exit $$s)"]
}
service {
name = "mongo-init-replica"
tags = [
"traefik.enable=false",
]
}
}
}
}
I don’t really understand dependencies task in nomad. In docker compose, simply depends_onbut as I can read in nomad, need to create a command with args wait consul?
And for 3 tasks, how to order.
And last. How I can mix command to wait other task and command to task requiered for this docker container?
Thanks and sorry for this large question from newbie.