# How to use ``mc mirror`` to setup replication between two sites running Minio. [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/minio/minio?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) ![minio_MIRROR](https://raw.githubusercontent.com/minio/blob/master/docs/screenshots/miniomirror.jpeg?raw=true) In this document we will illustrate how to set up replication between two Minio servers, `minio1` and `minio2` running on ``192.168.1.11`` and ``192.168.1.12`` respectively. We will mirror the data directory on `minio1` to the bucket on `minio2`. ## 1. Prerequisites * Download Minio server from [here](https://docs.minio.io/docs/minio) * Download & Install mc from [here](https://docs.minio.io/docs/minio-client-quickstart-guide) * Familiarity with [``mc mirror``](https://docs.minio.io/docs/minio-client-complete-guide#mirror) ## 2. Install and Configure Minio Server ### Setup minio1 ```sh $ ./minio server minio1-data/ Endpoint: http://127.0.0.1:9000 http://192.168.1.11:9000 AccessKey: MURIVYBYNPTYE7O8I779 SecretKey: lVbZmz4CvGkBl7JKw5icuL7RCcSvpBJTkAJTFQwz Region: us-east-1 ``` **mc alias** Alias is a short name to your cloud storage service for ``Minio client``. End-point, access and secret keys are supplied by your cloud storage provider. API signature is an optional argument. By default, it is set to ``S3v4``. ```sh $ ./mc config host add minio1 http://192.168.1.11:9000 MURIVYBYNPTYE7O8I779 lVbZmz4CvGkBl7JKw5icuL7RCcSvpBJTkAJTFQwz ``` **Create buckets and add objects** We have created few buckets using [``mc mb``](https://docs.minio.io/docs/minio-client-complete-guide#mb) and added objects to it using [``mc cp``](https://docs.minio.io/docs/minio-client-complete-guide#cp) Minio client commands. ```sh $ ./mc mb minio1/mybucket $ ./mc cp myfile.txt minio1/bucket1 $ ./mc ls minio1 [2016-07-31 10:26:55 PDT] 0B bucket1/ [2016-07-31 09:36:17 PDT] 0B bucket2/ [2016-07-31 09:38:08 PDT] 0B bucket3/ ``` ### Setup minio2 ```sh $ ./minio server minio2-data/ Endpoint: http://127.0.0.1:9000 http://192.168.1.12:9000 AccessKey: YRDRWWQLEWS9OBJ31GZ2 SecretKey: y2sSWzx5ytwvkELcxOuSaQ8n3doNqoIilRpb5Kjj Region: us-east-1 ``` ```sh $ ./mc config host add minio2 http://192.168.1.12:9000 YRDRWWQLEWS9OBJ31GZ2 y2sSWzx5ytwvkELcxOuSaQ8n3doNqoIilRpb5Kjj ``` **Create bucket** We are creating destination bucket ``mbucket`` on ``minio2`` and adding ``minio2`` alias. The bucket ``mbucket`` will be used to mirror data directory of ``minio1``. ```sh $ ./mc mb minio1/mbucket ``` ```sh $ ./mc config host add minio2 http://192.168.1.12:9000 YRDRWWQLEWS9OBJ31GZ2 y2sSWzx5ytwvkELcxOuSaQ8n3doNqoIilRpb5Kjj ``` ## 4. Setup crontab Cron is a Unix/Linux system utility by which you can schedule a task process for particular duration, we have tested this setup on Ubuntu Linux. ### Script Add crontab configuration on `minio1` providing path of data directory, ``minio1-data``. ``--force`` option with ``mc mirror`` overwrites the destination contents, this would keep your contents in sync. ```sh #!/bin/bash datadir="/home/minio/minio1-data/" minio2="minio2/mbucket" MC_PATH="/home/minio/mc" $MC_PATH --quiet mirror --force $minio1 $minio2 ``` Set executable permissions on the script before adding a cron entry. ```sh $ chmod 755 /home/minio/minio.sh ``` Set a new cron entry to run ``minio.sh`` script once every 30mins. ```sh $ crontab -e */30 * * * * /home/minio/minio.sh ``` Note: We are going to introduce continuous replication feature in `mc mirror` which will enable the sites to be in sync without having the need to setup cron job. # Explore Further * [Minio Quickstart Guide](https://docs.minio.io/docs/minio-quickstart-guide) * [Minio Client Complete Guide](https://docs.minio.io/docs/minio-client-complete-guide)