The first crossplatform collectible monster #metaverse between #VR & #Mobile. Open-World | Built on  @BNBChain

Metaverse Environments Built to Reward Participants Like its NFT and blockchain cohorts, the Metaverse industry moves at break-neck speed. The decentralized world of tomorrow — one which shifts network value to its users — is coming in hot. Three months is like three years in the land of blockchain. And it’s been even longer since this article landed on Hacker Noon: Top 3 VR Tokens Powering the Metaverse Today’s article aims to catch up with those three VR-powered projects’ forward progress while evaluating a couple of new contenders. Since CoinGecko’s Virtual Reality filter rode off into the sunset, we’ll re-evaluate January’s top 3, then use CTRL+F to find “VR” within the . (Sorry, ‘Ovr,’ but AR isn’t a complete Metaverse experience.) Metaverse category You can find deeper info on some top Metaverse frontrunners , featuring The Sandbox, Decentraland, and RFOX VALT, each a blockchain game in its own right. here However, only Decentraland and the VALT use VR in their immersive playgrounds. Plus, it’s great to research potentially underrated (for now) Metaverse environments. We’ll go through organizations ranked by reverse market capitalization as of late April 2022: Revomon ( ) $REVO VFOX Token ( ) $VFOX Netvrk ( ) $NETVRK Somnium Space ( ) $CUBE Victoria VR ( ) $VR Now, it’s doubtful that any of these organizations will take Meta’s greedy approach of stinging creators with a . GTFO of here, you crazy-ass mother Zuckers! highly 47.5% platform fee Ready to dive into organizations using experimental tech to create fairer, more balanced digital economies? The good news is that you don’t need VR goggles to gain new information about how to get in on the action … Revomon ($REVO) Resources: Revomon | Whitepaper Maximum Token Supply: 100M Blockchain Network: Ethereum Revomon was on January’s list and combines “revolution” and “monsters” to create its Pokémon inspiration. “Gotta catch ’em all!” The open-world RPG Metaverse environment contains islands where players battle, capture, and train NFT monsters bearing unique traits. Revomon is a play-to-earn VR-powered Metaverse experience mimicking Pokémon’s monster-training activities. New(ish) video content is out, and here’s where you can decide if this realm is worth exploring: If earning tokens to play video games is your jam, and you’re a fan of , visiting this Metaverse environment is your chance to earn $REVO. Pokémon GO The shows heaps of momentum on the development front. Still waiting to see how this one plays out. It’s very niche, but that niche has proven to be humongous. Revomon March 31 update VFOX Token ($VFOX) Resources: RFOX VALT | RFOX Ecosystem | RFOX Blackpaper Maximum Token Supply: 21M Blockchain Network: Binance Smart Chain VFOX token ties into rewards within the expansive RFOX ecosystem. After months and months of construction, RFOX VALT, a retail and entertainment Metaverse platform, launched its MVP to a select group of initial visitors on April 27, 2022. Inside that digital playground, visitors can enter large retail SHOPs represented by an NFT to purchase digital items. Whether it’s the primary or underlying payment method, all payments route through . $RFOX token The RFOX multiverse’s cryptoassets currently operate on the Ethereum network, BNB Chain, and the WAX blockchain, with other networks to follow. A small percentage goes into a pool each time there’s a purchase inside the VALT. And at periodic intervals — for roughly 90 days at a time — $VFOX holders can stake their tokens to earn $RFOX. VFOX is a semi-passive reward token entitling holders to a percentage of every transaction occurring inside the RFOX VALT retail and entertainment Metaverse platform. The unreal estate inside the RFOX VALT is exceptionally scarce compared to other Metaverse environments. Plots are known as SHOPs, and NFTs act as proof of ownership. RFOX only sells 25 SHOPs per quarter — Art, Games, Music, and Science+Tech — to the public. When VALT construction is complete, only 100 virtual real estate parcels will be outside the RFOX organization’s control. This virtual world also gives space to more prominent brands, including marquee clients and , which sold out an RFOX-assisted NFT drop in under five minutes. CoinGecko Reebok The Paul Barron Network recently had a chat with RFOX’s CEO to talk all things Metaverse while revealing insight into what makes the VALT tick: RFOX VALT is a serious endeavor. The RFOX organization began in 2018 as a small venture builder wielding blockchain tech. Only a handful of team members were on board. Fast-forward to today, and over 100 full-time staff work alongside a horde of contractors. The team’s experienced tremendous growth, but the crypto space has yet to catch on. Although it’s a game by nature, has plans for concerts, a VR roller coaster, and an educational planetarium inside the upcoming Science & Tech quarter. RFOX VALT The MVP launched. It's a bit rough around the edges but digital environments have to start somewhere. This has been brewing for years and it's fantastic to see it live. just Want a sneak peek? Here you go: Not to mention how the VALT links together RFOX’s independent , , and ventures. Products and services include play-to-earn blockchain gaming, DeFi staking and yield farming (the currently pays over 33% APR), a white-label NFT platform, plus video livestreaming with NFT mint-on-demand capabilities. gaming finance media RFOX-BNB farm Don’t sleep on the RFOX ecosystem because its economy is a sleeping giant. Netvrk ($NETVRK) Resources: Netvrk | Linktr.ee Maximum Token Supply: 100M Blockchain Network: Ethereum The Netvrk platform has seen development for more than five years, beginning with a VR prototype created by the project’s founder. Netvrk is a multichain Metaverse built on Unreal Engine, with powerful creation tools and infrastructure to create, share, experience, and monetize creations. Netvrk focuses on gaming, education, and e-commerce, all built around NFTs representing ownership of virtual land and assets. Netvrk’s inaugural metaverse is called Genesis Islands and consists of 15,000 NFT parcels located in one of five districts: Entertainment, Creative, Education, Business, and Adult. I wonder what goes on in that last one. Users can generate NFTs and use the $NETVRK token to buy virtual land, advertising space, and digital assets. Staking was available for a while, but that ship seems to have sailed. The project’s collab list is gigantic. Look at the partners/investors section on the Netvrk website to see logo after logo. The collection of so much VC money does make me question the level of control the Netvrk founders still have. After all, giving equity to 3rd parties allows them a voice in directing business decisions. Somnium Space ($CUBE) Resources: Somnium Space | Economy Paper Maximum Token Supply: 100M Blockchain Network: Ethereum Somnium Space is an open, social, persistent VR world featuring its own economy and digital currency, letting creators’ imaginations run wild on virtual plots of land. The platform’s virtual real estate NFTs, called CUBEs, freely trade on secondary markets. Owners are free to create their own experiences that click into the overall platform. Somnium Space rewards creative developers who enjoy building and monetizing their work. Somnium Space is currently collaborating with to deliver full-body haptic suits for use in VR. That is next-level immersion, indeed. Teslasuit Here’s a quick overview of what Somnium Space has to offer players and investors: Individuals and organizations have been snatching up property as of late. Property owners used 134,163 $CUBE tokens to buy 208 $ETH in virtual land. The recent 10-day Cube Extravaganza auction on OpenSea was a resounding success. With another $600K+ for development, Somnium Space should continue to blossom. Victoria VR ($VR) Resources: Victoria VR | Whitepaper Maximum Token Supply: 16.8B Blockchain Network: Ethereum Victoria VR bills itself as the world’s first realistic Metaverse. The game is a VR-powered MMORPG built on Unreal Engine and blockchain. An in-house NFT marketplace is where trading takes place, with players able to monetize their creations. In the project’s own words: Our vision is for you to be able to materialize your craziest ideas or most secret wishes and enable you to experience your greatest life desires. Here’s a recent trailer, and I’ll offer some thoughts on realism after you’ve seen it: Sure, it’s a mostly realistic rendition of a quasi-realistic environment. But there’s no denying you’re playing a video game. The website’s avatars are realistic-looking as well. That said, have you ever seen an animated character that didn’t give itself away as non-human by merely opening its mouth? Still waiting for avatar-speak to natural. We have a long way to go on that front. look But anything good takes time to build. Victoria VR has been going since 2018. That’s a solid testament to persistence —you may have been around long enough to remember that year was mostly a brutal bear market. Staking $VR tokens is available, with some nice perks attached. It’s not every project that awards airdrops for staking. Have a look at the team’s , and you can see how the rewards increase if you’re willing to lock up your tokens for more extended periods. staking calculator Wrapping Up There are plenty of opportunities for multiple Metaverse platforms to thrive. When interoperability becomes a reality, there’s no limit to where VR will take us. Hopping from one to another will become the norm. Like music and video games, who wants to play the same game and listen to the same song on repeat for eternity. The Metaverse is all about variety, and with some experimentation, you’ll find environments that you genuinely enjoy spending time in. Looking at supply vs. MarCap, $VFOX is the outlier here. The token’s one of the smallest in MarCap but coming in at about 1/5th of the average supply. Three of five on this list cap out at 100M tokens. When the VALT goes full-steam ahead and transactions begin to flow through, $VFOX holders should have reason to smile. Token speculation aside, which platforms are your favorite to use? Strap on your VR goggles if you want to discover the answer in our new digital frontier. *Disclaimer: At the time of writing, the author held BNB, ETH, RFOX, VFOX, and other digital assets.

Blockchain Pokémon and Monetized NFTs: 5 Tokens Enabling VR in the Metaverse

Pokémon Blockchain y NFT monetizados: 5 tokens que habilitan la realidad virtual en el metaverso

Pokémon Blockchain et NFT monétisés : 5 jetons permettant la réalité virtuelle dans le métaverse

ब्लॉकचैन पोकेमोन और मुद्रीकृत एनएफटी: मेटावर्स में वीआर को सक्षम करने वाले 5 टोकन

ブロックチェーン ポケモンと収益化された NFT: メタバースで VR を実現する 5 つのトークン

Pokémon Blockchain e NFTs Monetizados: 5 Tokens Habilitando VR no Metaverso

Blockchain Pokémon và NFT kiếm tiền: 5 Token cho phép VR trong Metaverse

区块链神奇宝贝和货币化 NFT：在元界中启用 VR 的 5 个代币

We're All Very Early to the Virtual Party Nobody can pinpoint the Metaverse's exact definition at this point in its short life. In other words, we know that we're onto something huge but have no idea what the Metaverse will one day become. However, we can say with 100% confidence that untold fortunes await those bold enough to snatch opportunity from the jaws of uncertainty. After a recent 10x user explosion, an is up for grabs. estimated $1.5T The Metaverse promises a network of engaging virtual environments providing endless entertainment, some of which reward users with tokens in exchange for time and attention. While "under construction" is a common theme, that merely indicates how early the Metaverse is in its lifecycle. To date, there are very few cohesive environments and far fewer support Virtual Reality headsets, which add a thick layer of immersion to Metaverse activities. Discovering the token-powered organizations shaping the Metaverse is only a few clicks away. CoinGecko's Metaverse category continues to expand, but the entire list occupies only a single page. Fantastic news for early-stage investors! Curious to go a little deeper, I used CoinGecko's to find Metaverse tokens belonging in overlapping categories due to an additional feature set. Only three of the six digital assets listed have measurable market capitalization and trading volume. Virtual Reality filter But don't let that fool you into thinking they're all shitcoins! Markets and the people who invest in them are irrational, and token prices don't always reflect fundamentals. Research is the key, and while you'll find some below, you're always encouraged to do your own. On that note, ranked by MarCap, here are the top 3 VR tokens for January 2022 … 1) Somnium Space ($CUBE) Resources: Somnium Space | Economy Paper Maximum Token Supply: 100M Blockchain Network: Ethereum Somnium Space is a persistent VR world featuring its own economy and digital currency, allowing creators to build whatever they'd like on virtual plots of land. The ecosystem's virtual real estate NFTs, known as CUBEs, freely trade on OpenSea. Somnium Space NFTs also trade on the FTX NFT marketplace, and the FTX exchange is building a inside Somnium's Metaverse environment. virtual HQ Somnium Space rewards creative developers who enjoy building and monetizing their work. Currently, in beta mode, the web app lets users explore the realm as a guest avatar or login for a more customized experience. The VR feature works across multiple platforms, and Somnium Space wants to own the entire experience, including a custom VR headset. Metaverse advertising is a growing market segment Somnium Space intends to leverage through a recent . Interested in picking up a plot and constructing a billboard? Here's a walk-through covering the land purchase process: partnership with Admix With a heavy focus on creation, Somnium Space is geared towards those willing to spend upwards of 50 hours on avatar design alone. In other words, Somnium Space rewards creative developers who enjoy building and monetizing their work. 2) VFOX Token ($VFOX) Resources: RFOX VALT | RFOX Ecosystem | RFOX Blackpaper Maximum Token Supply: 21M Blockchain Network: Binance Smart Chain VFOX token is a reward token inside the expansive RFOX multiverse. The Metaverse-builder is one of the industry's taking a to leverage Metaverse expansion. frontrunners picks and shovels approach Clicking into space-themed Metaverse environments are distinct business entities operating in DeFi, NFTs, media, play-to-earn mobile blockchain gaming, with other ventures and acquisitions to come. The RFOX VALT retail and entertainment Metaverse experience has four distinct quarters with unique aesthetics. For example, the gaming-themed Arkamoto (arcade + Nakamoto) quarter is in constant dark mode, while the sun always shines in the Callinova (calligraphy + supernova) quarter. VFOX is a semi-passive reward token entitling holders to a percentage of every transaction occurring inside the RFOX VALT retail and entertainment Metaverse experience. As for the other two quarters, they've yet to go on the auction block. Per the , the music-themed quarter will have a round of auctions in Q1 of this year. 2022 RFOX roadmap Unlike other Metaverse environments, the unreal estate inside the RFOX VALT is exceptionally scarce. Plots are known as SHOPs and use NFTs as proof of ownership. Only 25 SHOPs per quarter are available to the public, meaning once VALT construction is complete, only 100 plots will be outside of the RFOX organization's control. A small sampling of additional SHOPs goes to the brands and organizations responsible for bringing traffic into their respective quarter. These marquee clients include , , and VOID Cyber, the go-between that connected with the RFOX NFTs platform to launch a collection of digital kicks. CoinGecko Yield Guild Games Reebok Visitors enter SHOPs — taking a space train in between quarters — where they can purchase digital and, later, physical items. Although the VALT is a game, its focus is on the Metaverse’s retail aspect. SHOP owners monetize NFTs either by selling products or leasing the space out through the help of an assigned Quartermaster. Once fully fleshed out — hopefully by the end of 2022 — the VALT intends to offer a experience of ordering real-world food from a virtual space. Ready Player One All VALT transactions settle through $RFOX, the ecosystem's payment currency, operating on the Ethereum network and BSC. And 1% of every in-Metaverse purchase goes into a pool to reward $VFOX holders. So as not to be construed as a security, claiming rewards occurs in fully audited staking contracts on RFOX Finance. 3) Revomon ($REVO) Resources: Revomon | Whitepaper Maximum Token Supply: 100M Blockchain Network: Binance Smart Chain Revomon is the combination of "revolution" and "monsters" and has no qualms over showcasing its Pokémon inspiration. "Gotta catch 'em all!" The open-world RPG Metaverse environments consist of islands where players can battle, capture, and train unique NFT monsters. Revomon is a play-to-earn VR-powered Metaverse experience mimicking Pokémon’s monster-training activities. Paying further homage to a classic Nintendo series, Revomon's characters have a Zelda-meets-Pokémon vibe going. Here's a gameplay video giving an inside look at the VR-powered world: Players earn $REVO by participating in the ecosystem. One look at the project's documentation reveals a heavy focus on tokenomics. Holders of $REVO token can stake them and also use them to vote on community-driven proposals. While crypto, Pokémon, and VR aren't new, it's a novel idea to put them all together. Is the game fun or rewarding? I'll let you decide. Wrapping Up Although King Bitcoin is 13 years old, it's still far from Satoshi's vision of being the globe's dominant payment system. That said, the combination of DeFi, NFTs, and play-to-earn video gaming is pushing cryptocurrencies into the limelight. Retail and institutional investor demand continues to rise, and crypto transactions surged in 2021 to hit $15.8 trillion, the equivalent of roughly $43B in daily volume. 550% The Metaverse's creation and appeal show no signs of slowing down. The crypto-VR-Metaverse cocktail is potent and provides a risky yet potentially rewarding investment. I'm no financial guru and can't/won't/don't offer you any advice on such matters. However, from a investment standpoint, my money is on $VFOX for several reasons. passive For starters, $VFOX also has a max supply that’s only 1/5th of the other two, perfectly matching Bitcoin at 21M. There's no need to be or become a creator to profit from the RFOX VALT's success. Just holding the tokens is enough. The RFOX ecosystem is a sleeping giant. The organization is building a super dApp encompassing distinct business entities across numerous white-hot sectors. And as the RFOX VALT grows, so do the payouts to $VFOX holders. Although the other two Metaverse environments on this list are already in beta, I suspect that RFOX VALT will one day outshine them both. *Disclaimer: At the time of writing, the author held BNB, ETH, RFOX, VFOX, and other digital assets.

Top 3 VR Tokens Powering the Metaverse

Configure MongoDB with Kerberos Authentication

Steps to initiate replica set configuration in an existing standalone MongoDB cluster. Update Primary cluster Configuration: Create a key file for authentication in an existing MongoDB cluster. $ openssl rand -base64 756 > <path-to-keyfile>
$ chmod 400 <path-to-keyfile>
$ chown mongodb:mongodb <path-to-keyfile> 2. Add security and replication configuration in /etc/mongod.conf file. $ vim /etc/mongod.conf
security:
  keyFile: <path-to-keyfile>
replication:
  replSetName: <replicaSetName> <a href="https://medium.com/media/d560e3290364ee8096219d8184109e0f/href">https://medium.com/media/d560e3290364ee8096219d8184109e0f/href</a> Refer this link for more details: Enforce Keyfile Access Control in a Replica Set - MongoDB Manual 3. Restart MongoDB in existing MongoDB cluster. $ systemctl restart mongod
$ systemctl status mongod In case of error please refer file and try to fix on the basis of error logs. /var/log/mongodb/mongod.log 4. Login in mongo with admin credentials. $ mongo -u <username> -p <password> — authenticationDatabase admin
$ use admin 5. Initiate replica set configuration. $ rs.initiate() 6. Check the status and configuration of the replica set: $ rs.conf()
$ rs.status() 7. Now, the existing cluster becomes . Primary Create Secondary Cluster: Create a Machine with the required specifications in the cloud platform. SSH in the machine using the command: $ ssh <Cluster_IP>
$ sudo su 3. Install MongoDB in the new machine. For compatibility, The version of MongoDB should be the same as the version in the existing Primary cluster. These are the Command to install MongoDB in new compute engine. Please change the version of MongoDB based on your requirement: $ sudo apt-key adv — keyserver hkp://keyserver.ubuntu.com:80 — recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5
$ echo “deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse” | sudo tee /etc/apt/sources.list.d/mongodb-org-3.6.list
$ sudo apt-get update
$ sudo apt-get install -y mongodb-org 4. Copy same configuration file and in new machine from existing primary MongoDB cluster. /etc/mongod.conf key file <path-to-keyfile> change the permission of the key file using these commands: $ chmod 400 <path-to-keyfile>
$ chown mongodb:mongodb <path-to-keyfile> 5. start mongod in new MongoDB cluster. $ systemctl start mongod
$ systemctl status mongod In case of error please refer file and try to fix on the basis of error logs. /var/log/mongodb/mongod.log Add the new machine as a replica in an existing primary cluster: Login in Primary cluster: $ mongo -u <username> -p <password> — authenticationDatabase admin
$ use admin 2. Add the new machine in Primary MongoDB: $ rs.add({host: <Cluster_IP:27017>, priority: <priority>, votes: <votes>}) 3. Check status and configuration: $ rs.conf()
$ rs.status() 4. Login in the new machine and verify about replication: $ mongo -u <username> -p <password> This machine will become as secondary and start replicating all data. Verify replica set connection with JavaScript: sample code to verify replica set configuration using JavaScript. <a href="https://medium.com/media/2757375a31f78f94bb44a81dbc25e908/href">https://medium.com/media/2757375a31f78f94bb44a81dbc25e908/href</a>

How to setup replicaSet in standalone MongoDB cluster.

In this post, we will be installing MongoDB in Amazon EC2 instance and secure it using authentication mechanism. One comes to knows the importance of security only when he knows the importance of its job. It is said to be that over 30% of MongoDB databases and its connections are not secured. So don’t you want to secure it? Of course, everyone loves to secure whatever they host. Let’s start implementing it. The steps in the MongoDB site are not enough for a noob to complete the steps successfully. This happened to me personally. After going through almost hundreds of post, I finally decided to document it perfectly because I know . If you find any difficulties in this post, feel free to comment. I will try to reply as soon as possible. Sharing is Caring I assume you are already aware of Amazon Web services and little knowledge on EC2. If you are not don’t worry. I have created a tutorial about AWS(Amazon Web Services) and EC2 instance setup in the following post. Request you to go through the same. _In this part, we will be creating an Amazon account, EC2 instance and connect to that instance via SSH._medium.com Make your Amazon EC2 instance up and running. Let’s install the MongoDB. Once you are ready with the terminal, let’s start installing MongoDB in it. Since we are going to set up this installation in minutes, I would request you to go through below link in the references section for the below-mentioned command for its detailed usages if you need. : Import the public key used by the package management system. Step 1 sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5 : Create a list file for MongoDB. (for Ubuntu 16.04) Step 2 echo “deb [ arch=amd64,arm64 ] xenial/mongodb-org/3.6 multiverse” | sudo tee /etc/apt/sources.list.d/mongodb-org-3.6.list https://repo.mongodb.org/apt/ubuntu : Reload local package database. Step 3 sudo apt-get update : Install the MongoDB packages. Step 4 sudo apt-get install -y mongodb-org This will install the latest stable version of MongoDB. That’s it, We have installed MongoDB latest stable version in our Amazon EC2 instance. In the following process, We will first create an , who generally has root access to your database and then will create a who can be created with specific roles and access to specific databases. Finally, we will be using credentials to connect to our database and start working on it. _admin_ _admin_ _user_ _user_ Let’s start the MongoDB : Start MongoDB. Issue the following command to start . Step 1 [mongod](https://docs.mongodb.com/manual/reference/program/mongod/#bin.mongod) sudo service mongod start : Verify that MongoDB has started successfully by typing the following command, Step 2 cat /var/log/mongodb/mongod.log and ensure you find the below line at the last. [initandlisten] waiting for connections on port 27017 That’s it. You are successfully running MongoDB instance in your remote instance right now. Issue the following command to stop (Don’t execute till needed) Note: [mongod](https://docs.mongodb.com/manual/reference/program/mongod/#bin.mongod "bin.mongod") sudo service mongod stop Issue the following command to restart (Don’t execute till needed) Note: [mongod](https://docs.mongodb.com/manual/reference/program/mongod/#bin.mongod "bin.mongod") sudo service mongod restart It’s time to secure your MongoDB. Enabling access control on a MongoDB deployment enforces authentication, requiring users to identify themselves. When accessing a MongoDB deployment that has access control enabled, users can only perform actions as determined by their roles. The following procedure first adds a user administrator to a MongoDB instance running without access control and then enables access control. Access Control? — Yes, when you run the MongoDB with AccessControl, you are saying, Start secure MongoDB instance. — This user can administrate user and roles such as: create users, grant or revoke roles from users, and create or modify customs roles. admin Procedure : Create a directory to store data and set permission to it. Step 1 //Creating a path to store DB data. sudo mkdir -p /data/db //Giving yourself permission to write in that folder. sudo chown $USER /data/db If you have any difficulties in setting up this folder and permission, you may refer to this link. StackOverflow : Start MongoDB without access control. Step 2 mongod --port 27017 --dbpath /data/db : Let the MongoDB instance run on this terminal instance. Now let’s work on another remote terminal instance (Say Terminal 2) so that we will be switching to and fro after creating a user and to restart Mongo instance. Step 3 Open a new terminal and connect to your EC2 instance. Now we will be working on Mongo Shell which is used to run commands or queries in your created database. Now we are going to create Mongo Shell by issuing the below command. mongo --port 27017 Now your terminal will look like a below image, which is ready to run commands in it. Mongo Shell : Create the user administrator ( ) Step 4 admin In the database, add a user with the role. This database acts as admin DB where we creating it only for authentication purpose. admin [userAdminAnyDatabase](https://docs.mongodb.com/manual/reference/built-in-roles/#userAdminAnyDatabase "userAdminAnyDatabase") Issue the following command to switch to admin DB even though you haven’t created it. It will be created automatically when you issue the command. use admin After switching to admin DB, let’s create an by issuing the following command. admin db.createUser({user: "admin", pwd: "adminUser123", roles: [{role: "userAdminAnyDatabase", db: "admin"}]}) Which is prettified as, (Above prettified command, do not run twice) db.createUser({user: “admin”,pwd: “adminUser123”,roles: [ { role: “userAdminAnyDatabase”, db: “admin” } ]}) Now you have created an user called with role. admin userAdminAnyDatabase Disconnect the mongo shell by pressing . Ctrl+C : Switch back to an old mongod instance (Terminal 1) where it is running. Let’s restart the MongoDB instance with access control to gain admin access to our databases. Remember, you are starting your Mongo instance with access control now. Step 5 Re-start the instance with the command line option. [mongod](https://docs.mongodb.com/manual/reference/program/mongod/#bin.mongod "bin.mongod") --auth mongod --auth --port 27017 --dbpath /data/db : Switch back to Terminal 2 (mongo shell instance). Step 6 Connect and authenticate as the user administrator by issuing the below command. mongo --port 27017 -u "admin" -p "adminUser123" --authenticationDatabase "admin" : Create additional users ( ) as needed for your deployment. Step 7 user Once authenticated as the user administrator, use to create additional users. You can assign any or to the users. The following operation adds a user to the database who has a role in the database [db.createUser()](https://docs.mongodb.com/manual/reference/method/db.createUser/#db.createUser "db.createUser()") built-in roles user-defined roles myTester test [readWrite](https://docs.mongodb.com/manual/reference/built-in-roles/#readWrite "readWrite") test Issue the following command to create a database called and use it. test use test Now let’s create a user in this database, assigning specific roles to her/him. db.createUser({user: "user", pwd: "user123", roles: [{role: "readWrite", db: "test"}]}) Which is prettified as, (Above prettified command, do not run twice) db.createUser({user: "user",pwd: "user123",roles: [ { role: "readWrite", db: "test" } ]}) Now you have successfully created a user with specific roles and access to database. : Connect and authenticate as a now. Step 8 user Now, connect to the instance with the user role by issuing the following command in the same Mongo Shell. mongo --port 27017 -u "user" -p "user123" --authenticationDatabase "test" You are now securely authenticated as a user to the database called . If you want to perform some query operations, you can issue the below command and test now. test db.foo.insert( { x: 1, y: 1 } ) Which creates a collection called and insert a aforementioned JSON in it. foo Connect via Mongo URI connection string. Below given the connection string needed to connect to this instance securely from your Node.js server, using mongoose module. mongodb://user:user123@localhost:27017/test Yes. You have installed and configured your MongoDB securely in your remote server. Let’s take a break for a while. In the next tutorial, let us use and create an image and automate all this process so that just a Docker image is required to install and secure MongoDB in any instance in a single command. Docker Thank you. References: _You can create users either before or after enabling access control. If you enable access control before creating any…_docs.mongodb.com Enable Auth - MongoDB Manual _Due to a lock elision bug present in older versions of the package on Ubuntu 16.04 for POWER, you must upgrade the…_docs.mongodb.com Install MongoDB Community Edition on Ubuntu - MongoDB Manual

How to install and secure MongoDB in Amazon EC2 in minutes?

React.js & Express.js ES6 Build and Deployment Get DigitalOcean account I have been using for me and setup for my customers, so recommend use it for your project just pick vps depend on how big of your project start at 5$ or 10$, 20$, price very flexibility. DO providing SSD cloud hosting but good price i dont think you can get same price on other providers with same quality. beside their support very fast and well documentation , friendly UI for end-user. so let get start register an account and deploy your app at DigitalOcean DigitalOcean.com Setup Ubuntu on DigitalOcean Cloud VPS This tutorial i will use Ubuntu and i also recommend this OS for your vps. but it is your choose. for me i use Ubuntu 16.04 version. for price it is depend on how big of your project how many trafics to. for me i start at 20$/month is good start and then we can upgrade. Choose a datacenter region: DigitalOcean has many datacenters that mean you can pick one for your project if your visitors almost from NY United States let select New York, so example if i target all visitors from Vietnam for a project so i can pick a datacenter near Vietnam is Singapore. Select additional options: if you want to have additional backup service, or private network. Add your SSH keys: you can genrate your ssh key on your computer and copy it to your vps and that mean when you login from ssh dont have to enter the password of root account any more, save your time and more security, if you would to know how to generate ssh key and use it on DigitalOcean hosting let see this article Droplet default is 1 if you want to setup mutiply droplets at once time let use it. name of your droplet and click submit, just get a cup of coffee and wait a moment for DigitalOcean setup for you. until you see “Happy coding!” Your cloud vps is ready to use. Check your email address that you did register in DigitalOcean you shold get an email notify about your VPS IP, root account and password. here is format of your email Droplet Name: [Name of your Droplet] IP Address: [your-vps-IP] Username: root Password: [your-root-password-generated-by-robot] Login to your vps with following command ssh root@YOUR-IP-ADDREESS now enter your root password that in your email. You will asking for change new password at the first time. Server will ask you current password again (this is password in your email) Enter new password Confirm password , and remember it for later. Done and happy setting up your cloud. Configure Firewall on your Cloud This is very important step we need to do. so we need to reconfigure our firewall software to allow access to the service I recommend open port only for 80,443, ssh (port 22), but it is depend on your project may need more port open for other service. in this project we need open port 80 for http access, 443 https (ssl) , and port 22 (for ssh login) that is enough. Install Nginx apt-get update

sudo apt-get install nginx By default Firewall is inactive, you can check it by run command sudo ufw status sudo ufw app list So let config FW allow those ports by sudo ufw allow 'Nginx Full'

sudo ufw allow 'OpenSSH'

sudo ufw enable Setup Nodejs on DigitalOcean Ubuntu 16.04 We are using Node.js for Backend and will serve static files of react application build. So Node.js is required visit to see the documentation https://nodejs.org/en/download/package-manager/ We use package management to install, here is command to install Node.js v9 curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -

sudo apt-get install -y nodejs After successful Node.js installed we can check the version by typing in command line : and you see see "v9.3.0" node -v Setup MongoDB v3.6 on DigitalOcean Ubuntu 16.04 Cloud VPS We are using MongoDB for database in backend restful service so let install Mongodb by follow the documentation https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/ Import the public key used by the package management system sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5 Create a list file for MongoDB (Ubuntu 16.04) echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.6.list Reload local package database sudo apt-get update Install the latest stable version of MongoDB sudo apt-get install -y mongodb-org Start MongoDB (Port running default: 27017) sudo service mongod start If You Want to Stop MongoDB sudo service mongod stop Or Restart MongoDB sudo service mongod restart Install Nginx — Http Proxy Server. Let me explain to you very simple why we do use Nginx for this Nodejs Web application. Example: Our Chat app when we start it running on port 3000 that is default of Nodejs application running. we can change the port to 3001 or 3002, or 8080 … so if you pointed your domain tabvn.com to Degital Ocean cloud vps so this case we can visit the chat app in so we need just see nodejs web app in default port 80 such at , that is why we use Nginx. http://tabvn.com:3000 http://tabvn.com To install Nginx visit the documentation from official http://nginx.org/en/linux_packages.html So we will run following command on Ubuntu Cloud Hosting 16.04 apt-get update

sudo apt-get install nginx Start Nginx: open your IP address ex: you should see “Welcome to nginx!”, all Nginx config in our cloud is in /etc/nginx/nginx.conf http://123.456.789 sudo nginx Stop Nginx sudo nginx -s stop Reload Nginx nginx -s reload Fixed issue of bcrypt on Ubuntu 16.04 sudo apt-get install build-essential Nginx config sample support WebSocket Nginx Websocket document: http://nginx.org/en/docs/http/websocket.html server {        listen 80;        root /var/www/html;        location / {                proxy_pass http://127.0.0.1:3001;                proxy_http_version 1.1;                proxy_set_header Upgrade $http_upgrade;                proxy_set_header Connection "upgrade";        }} Video: https://www.youtube.com/watch?v=wJsH45eWNBo

Deploy React.js (create-react-app) Node.js to DigitalOcean Cloud Hosting

What is Rocket Chat? is a Web Chat Server, developed in JavaScript, using the full stack framework. It is a great solution for communities and companies who wants to privately host their own chat service or for developers who are looking forward to build and evolve their own chat platforms. Rocket.Chat Meteor The Rocket.Chat is an open-source chat platform. It have various features which include - Help Desk Chat File Sharing Video Conference Voice Messages Link Preview API Integration Prerequisites To follow this guide you need - Kubernetes Cluster GlusterFS Cluster Rocket Chat Application Step 1 — Create a Rocket Chat Container Image Create a file name “Dockerfile” for Rocket.Chat. This image contains our custom code for rocket chat and docker file which will look like - FROM node:4-slim
MAINTAINER XenonStack
COPY bundle/ /app/
RUN cd /app/programs/server \&&  npm install
ENV PORT=3000 \
ROOT_URL=http://localhost:3000
EXPOSE 3000
CMD ["node", "/app/main.js"] Rocket Chat Docker image has a base image of Node.js Version 4. After that, we put our custom code to the container and install all the required dependencies in Rocket Chat container. Later we put MongoDB URL as the environment variable for the database connection. Rocket Chat application is started in the dforeground mode so that we can see logs in “stdout” of the container. Step 2 — Build Rocket Chat Docker Image $ docker build -t dr.xenonstack.com:5050/rocketchat:v1.0 Step 3 — Create a MongoDB Container Image Create a file name “Dockerfile” for and docker file will look like - MongoDB FROM ubuntu
MAINTAINER XenonStack
RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10 && \
echo "deb http://repo.mongodb.org/apt/ubuntu   trusty/mongodb-org/3.0 multiverse" | tee /etc/apt/sources.list.d/mongodb-org-3.0.list && \
apt-get update && \
apt-get install -y mongodb-org
VOLUME ["/data/db"]
WORKDIR /data
EXPOSE 27017
CMD ["mongod"] MongoDB Docker image has a base image of Ubuntu. We have created this dockerfile for MongoDB Version 3.0 for some compatibility issues with Rocket Chat. Next, we mount Volume “/data/db” for persistent storage of container. Next, we expose 27017 port for incoming requests to MongoDB server. Then, we start MongoDB server in dforeground mode so that we can see logs in “stdout” of the container. Step 4 — Building a MongoDB Docker Image $ docker build -t dr.xenonstack.com:5050/mongo:v3.0 Step 5 — Create a Storage Volume (Using GlusterFS) Using below mentioned command we create a volume in GlusterFS cluster for MongoDB. As we don’t want to lose our Database data just because a server dies in the cluster, so we put replica, 2 or more if we want the higher availability of data. $ gluster volume create apt-cacher replica 2 transport tcp k8-master:/mnt/brick1/mongodb-disk  k8-1:/mnt/brick1/mongodb-disk
$ gluster volume start mongodb-disk
$ gluster volume info mongodb-disk Step 6 — Deploy MongoDB on Kubernetes Deploying MongoDB on Kubernetes have following prerequisites - We have created a Docker Image for MongoDB in Step 4 Docker Image: We have created a Persistent Shared Storage Volume in Step 5 Persistent Shared Storage Volume: Deployment & Service Files: Next, we will create Deployment & Service Files. Deployment & Service Files: Now let’s create a file name “deployment.yml” for MongoDB. This deployment file will look like - apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: mongodb3
namespace: production
spec:
replicas: 1
template:
metadata:
labels:
k8s-app: mongodb3
spec:
containers:
- name: mongodb3
image: dr.xenonstack.com:5050/mongo:v3.0
imagePullPolicy: "IfNotPresent"
ports:
- containerPort: 27017
volumeMounts:
- mountPath: /data/db
name: mongodisk1
volumes:
- name: mongodisk1
glusterfs:
endpoints: glusterfs-cluster
path: mongodb-disk
readOnly: false We also need to create a file named “service.yml” for MongoDB. This service file will look like - Read The Full Article at — XenonStack.com/Blog

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