Introduction to Consul io Training:
Consul io Training is an open-source tool for service discovery and configuration. It is a completely distributed solution that makes use of latest technology to provide an internal DNS names for the services. It acts as a kind of vendor to help you sign and register names, enabling you to access services instead of specific machines. Consul is highly available and scales to thousands of nodes and the services across multiple datacenters.
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Prerequisites to learn Consul io Training:
- Working knowledge of the Sigma Chi Governing Laws
- Knowledge on Ritual, risk management regulations, laws and policies
- Basic knowledge of Linux, Git, Golang, Docker and AWS- Consul io training
Overview about Consul io Training:
Consul io has multiple components but as a whole, it is a tool for discovering and configuring services in your infrastructure. Consul io Training is designed to be friendly for both the DevOps community and application developers. It is perfect for modern and elastic infrastructures. It keeps organizational data safe, embraces modern practices and works with the largest of infrastructures
Importance of Consul io Training:
Consul io provides multiple features that are used to provide consistent and available data about your infrastructure. This includes service and node discovery mechanisms, health checks, consensus-based election routines, a tagging system, system-wide key/value storage and more. By leveraging consul io within your organization, you can easily build a sophisticated level of awareness into your applications and services. Consul io Training is a Hashicorp based tool for discovering and configuring a variety of different services in your infrastructure. One of the core reasons to build Consul was to maintain the services that present in the distributed systems.
Features of Consul io training:
It provides several key features:
- Service Discovery: Clients of Consul io can provide a service, such as api or mysql and other clients can use the Consul io to discover providers of a given service. Using either DNS or HTTP, applications can be easily find the services they depend upon.
- Health Checking: Consul Clients can provide any number of health checks, either associated with a given service or with the local node. This information can be used by an operator to monitor cluster health and it is used by the service discovery components to route traffic away from unhealthy hosts.- consul io training
- KV Store: Applications can make use of Consul’s hierarchical key or value store for any number of purposes, including dynamic configuration, feature flagging, coordination, leader election and more.
- Multi Datacenter: Consul supports multiple datacenters out of the box. This means users of Consul do not have to worry about building additional layers of abstraction to grow at multiple regions.- Consul service discovery corporate course
About Service Discovery:
Service discovery is one of the most important features of Consul io Training. It is defined as the detection of various services and network protocols using which a service is found. The usage of service discovery comes in as a boon for distributed systems. This is one of the main problems, which are faced by today’s large-scale industries with the advancement of distributed systems in their environment.
Components are used in Consul io Training:
- Automatic bootstrapping
- Manual bootstrapping
- Using DNS Forwarding
- DNS Caching
Automatic Bootstrapping
Bootstrapping is one of the core features of Consul. When you install consul for the first time, it is automatically configured to detect, identify and join nodes and it comes across. During its cluster formation, automatic bootstrapping is a built-in feature of Consul.- Consul service discovery corporate course
Manual Bootstrapping
Manual Bootstrapping is an old and useful feature of Consul. Actually, during Consul’s earlier version, bootstrapping has to be done manually when installing and using consul for the first time. Later, it was realized that it was not possible to perform this command line operation at different times. Hence, automatic bootstrapping was introduced.
Using DNS Forwarding
The DNS forwarding can be done using BIND, dnsmasq and iptables. By default, the Consul agent runs as a DNS server listening on port 8600. By submitting DNS requests to the Consul agent’s DNS server, you can get the IP address of a node running the service in which you are interested.
DNS Caching
Consul serves all DNS results with a ‘0 TTL’ value. However, due to the TTL values, it can be set to allow DNS results to be cached with downstream of Consul io. Higher TTL values reduce the number of lookups on the Consul servers and speed lookups for clients, at the cost of increasingly stale results.
Functionalities of Consul io training:
The following functionalities for failover Events:
- Single Cluster Failure
- Jepsen Testing
- Multiple Cluster Failure
- Taking snapshots
Single Cluster Failure
In a single cluster failure, the cluster placed in one of the datacenter that starts failing. In every case scenario, it is important to make sure that in case of a failover the system cannot only prevent it, but also have a backup that it can rely on. For preventing Consul Failover events, we are going to use something called as Consul-alerts.
Jepsen Testing
Jespen is a tool written to test the partial tolerance and networking in any system. It tests the system by creating some random operations on the system.- Consul service discovery corporate course
Multiple Cluster Failure
During a Multiple Cluster Failover event, the clusters deployed in multiple datacenter fail to support the services that are supported to the customer. Consul io Training enables us to ensure that when one of such condition occurs, Consul has features that help you to enable services in such type of conditions.
Taking Snapshots
Snapshots are an essential and important part for managing the Consul io cluster in case of backups. By default, Consul io provides us a way to save snapshots of the consul cluster.