Table of Contents
How do I make a master slave in AWS?
Setup Jenkins Master Slave Configuration on AWS
- Prerequisites: Launch 2 AWS EC2 Linux instances (Follow Here).
- Click on New Node.
- Enter node configuration details as shown below.
- In Credentials, Click Add -> Jenkins.
- Go to Slave EC2 server and copy the private key.
- Click on the new node (slave1) and select “log”.
- QASCRIPT.
What is master slave configuration?
Nearly all current surgical robotic systems employ a master–slave configuration, where the surgeon uses joystick-like controls at the master console to direct the movements of the robotic instruments (slave).
What is the difference between Jenkins master and slave?
The Jenkins master acts to schedule the jobs, assign slaves, and send builds to slaves to execute the jobs. It will also monitor the slave state (offline or online) and get back the build result responses from slaves and the display build results on the console output.
How does master and slave nodes communicate in Jenkins?
Jenkins uses a Master-Slave architecture to manage distributed builds. In this architecture, Master and Slave nodes communicate through TCP/IP protocol. The main Jenkins server acts as the Master node that manages slaves. A slave is a Java executable that runs on a remote machine.
What is master slave database?
As the name suggests, the master-slave is a database architecture divided into a master database and slave databases. The slave database serves as the backup for the master database. The master database is actually the keeper of the data resources and also the place where all the writing requests are performed.
What is replica in AWS?
Amazon RDS Read Replicas enable you to create one or more read-only copies of your database instance within the same AWS Region or in a different AWS Region. Updates made to the source database are then asynchronously copied to your Read Replicas.
What is the use of master-slave?
Master/slave is a model of communication for hardware devices where one device has a unidirectional control over one or more devices. This is often used in the electronic hardware space where one device acts as the controller, whereas the other devices are the ones being controlled.
How does a master-slave work?
Master/slave is a model of asymmetric communication or control where one device or process (the “master”) controls one or more other devices or processes (the “slaves”) and serves as their communication hub.
Why do we need Jenkins slave?
Each builds requires a different testing environment which is not possible for a single Jenkins server. In order to perform testing in different environments, Jenkins uses various Slaves as shown in the diagram. Jenkins Master requests these Slaves to perform testing and to generate test reports.
What is difference between Master and Slave?
In mechanical technology, the term can refer to the configuration of motors such as two motors connected to different drives that are acting on the same load; one drive is defined as the master, doing the speed and control of the load, whereas the slave is there to help increase the torque.
How do I connect master-slave?
Steps to Configure Jenkins Master and Slave Nodes
- Click on Manage Jenkins in the left corner on the Jenkins dashboard.
- Click on Manage Nodes.
- Select New Node and enter the name of the node in the Node Name field.
- Select Permanent Agent and click the OK button.
- Enter the required information.
What is master-slave used for?
In computer networking, master/slave is a model for a communication protocol in which one device or process (known as the master) has total control one or more other devices or processes (known as slaves).
Can Stop RDS Read replica?
You can’t stop a DB instance that has a read replica, or that is a read replica. You can’t stop an Amazon RDS for SQL Server DB instance in a Multi-AZ configuration. You can’t modify a stopped DB instance. You can’t delete an option group that is associated with a stopped DB instance.
How does master-slave communication work?
Is Modbus TCP master-slave?
Modbus serial protocol (the original version) is a master/slave protocol, e.g. one master that controls the Modbus data transactions with multiple slaves that respond to the master’s requests to read from or write data to the slaves. Modbus TCP, also known as Modbus TCP/IP, uses a client/server architecture.
How does master slave architecture work?
And that’s where master-slave architecture comes in handy. Basically, master-slave databases involve caching data from the master database to the slave databases. This replication process helps database administrators to replicate copies of the parent database to multiple servers simultaneously.
Is TCP a Jnlp?
JNLP Port. Jenkins slaves running in OpenShift communicate with the Jenkins master using a separate TCP connection. The TCP port to make use of is specified in the Configure Global Security within Jenkins management page.
How to setup Jenkins server on AWS EC2 with slave agents?
Setup jenkins server on AWS EC2 with slave agents Posted on 23-Jan-2019 Create a security group for master server In top menu, click on Servicesand then click on EC2under Computesection In the left menu sidebar, under NETWORK & SECURITYclick on Security Groups Here, click on the blue button Create Security Group
How do I assign a volume to a slave EC2 server?
Attach the new “/data” volume to your slave EC2 server in your AWS console. Specify the volume device name shown for the old/existing volume (e.g. “/dev/sdb”).
How to connect to a slave node using SSH?
Click “Add” button on Credentials: Type in “Username” and copy the private key ( ~/.ssh/id_rsa) of the master server: Now we can see our Slave Node #1 is up and connected:
How to install sshand ssh agent on Amazon EC2?
Click on Availableand in the top right side on the Filtersearch type ec2. Then select Amazon EC2, then search for SSHand add SSHand SSH Agentplugins and then click Download now and install after restart