To host your application you need to create an appropriate environment firstly. It will be spread across a set of servers, chosen according to your app’s requirements and programming language it is written in. Herewith, every instance in Jelastic environment (like database, app server etc.) represents an independent virtual machine (container).
Jelastic monitors and maintains your environment. For example, if instances need more resources, they are moved to more powerful hosts without the necessity of your manual intervention. In addition, Jelastic sends you an email notification whenever it makes any modifications to your environment.
The following guide will help you to pass through the steps of environment creation, describing the available software stacks and additional possibilities the Jelastic Cloud provides. So, proceed to the steps below:
Now let’s consider each of the available blocks in more details:
If you want to set up the load balancing, simply pick the NGINX-balancer node by clicking the Balancing button (also, it is automatically enabled if you use more than one server). Then, specify the resources limits for vertical scaling of your server (fixed and dynamic amount of cloudlets you want to use) in the center section of the Environment topology window.
If you need an external IP address, switch on the Public IPv4 option (please note: this is a paid add-on).
Click the Application servers button.
In case of .NET usage, the only available version (.NET 4) will be chosen automatically.
Using the Cache icon, you can add a Memcached node.
Use the sliders to change the cloudlet limits for its vertical scaling.
There are two sets of databases available: SQL and NoSQL databases.
Click on the NoSQL icon to activate a NoSQL Database. Choose your desired database from the drop-down menu.
Then specify the cloudlet limits using the sliders. If you need a public IP, switch on the Public IPv4 option (please note: this is a paid add-on).
There are a few additional options available: Storage, VPS, Maven and SSL.
A few other options are also available here, like setting number of server instances, Sequential restart delay (to specify a particular time frame between restart of two containers within one layer) and Public IPv4 / IPv6 addresses enabling (note that it is a paid option).
In addition to the variety of available programming languages, the environment wizard contains one more special Dockertab, intended for creation of containers, based on Docker templates. Inside, you’ll find four equal blocks with different layer names to the left, where you can select any amount of Docker containers with required software (added either within just one section or to different ones).
Once a particular template’s slot is chosen (at the bottom part of the frame), you can specify the resources limits for it using the cloudlets sliders, attach the Public IPv4 address (please note: this is a paid option) or perform some basic container configurations through a separate graphic tool (Edit button).
Also, the abovementioned SSL option is available for Docker-based environments (currently only the Jelastic SSLcertificates are supported).