MongoDB replica

Simple tool for create hardened(+Full TLS communication) MongoDB replication with extra tools

Usage

sudo ./prepare.sh (name space) (domain) [number of nodes] [initialize port]

• option (name space) required, consider variable as subdomain, like app0
• option (domain) required, it's actually your domain name, cluster-domain.tld or mongo.cluster-domain.tld
• option [number of nodes] is optional and supported following props: 3, 5 and 7
• option [initialize port] is optional and default is 27000 and must be >= 1300 and <= 48000

sudo ./prepare.sh app0 cluster-domain.tld
# sudo ./prepare.sh [name space] [domain] [number of nodes] [initialize port]
# other examples
# sudo ./prepare.sh app0 cluster-domain.tld 3 28000
# sudo ./prepare.sh app0 cluster-domain.tld 5 12000
# sudo ./prepare.sh app0 cluster-domain.tld 7

# then your files are in deploy/app0
# scp to your servers deploy/app0/node0 -> node0
# scp to your servers deploy/app0/node0 -> node1
# scp to your servers deploy/app0/node0 -> node2

DNS

Set your dns for following servers, for example:

app0-mongo-0.cluster-domain.tld A record 192.168.0.100
app0-mongo-1.cluster-domain.tld A record 192.168.0.101
app0-mongo-2.cluster-domain.tld A record 192.168.0.102

Initialize

For first initialize you must follow these steps:

For all nodes

1. Allow list of ips or subnet want to access cluster via nginx acl, server ips and application ips

   nano nginx/acl.conf
   

2. Set data path variables

   mv .env.sample .env
   nano .env
   

3. Then up the container

   docker-compose up -d

4. Then go to first node for first initialize

   # create replica wait about 30 seconds to replica start
   ./init-replica.sh
   # you have to see: { ok: 1 }
   
   # then enable auth
   ./init-auth.sh
   # you have to see: { ok: 1 }

Create db and user

On any node

# create data name space you can use it in every data domain like other databases:
python3 ./namespace.py --url="https://www.example.com"
# example-com-d-8h0en49h9rs63etk # for development environment
# example-com-t-8h0en49h9rs63etk # for testing environment
# example-com-s-8h0en49h9rs63etk # for production staging environment
# example-com-p-8h0en49h9rs63etk # for production environment

# create app0 with random user and db suffix with generated password
# also guide for set replica connection string
./create-db-user.sh example-com-d-8h0en49h9rs63etk

Backup

For create backup on any node:

# daily backup if exist will be skipped
./backup.create.sh db-example-com-d-8h0en49h9rs63etk

# now backup
./backup.create.sh db-example-com-d-8h0en49h9rs63etk now

For restore backup on any node

# will be drop old database and restore from file
./backup.restore.sh db-example-com-d-8h0en49h9rs63etk mongo-replication.app0.db.db-vod-promizer-ir-p-av5vwu335w9f.2023-05-22.tgz

On production

You can easily add cron job and run:

* * * * * /path/to/deployment/cron-all-db-daily.sh '10,15,20'

first argument is load average for start creating backup if system is no under pressure then daily backup for all databases will start.

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