EBS | 电子招投标 -

I am learning about aws and using ec2 instances. I am trying to understand what a volume is.

I have read from the aws site that:

An Amazon EBS volume is a durable, block-level storage device that you can attach to your instances. After you attach a volume to an instance, you can use it as you would use a physical hard drive.

Is it where things are stored when I install things like npm and node? Does it function like the harddrive o my server?

I have attached the below ebs volumes in my aws ec2 instance

We recently upgraded our DB from 12c (12.1.0.2.0) to 19c(19.0.0.0.0) in EBS 12.1.3 environment on test instance. After upgrade I am unable to deploy custom web services using SOA rest services integration repository. I am getting following error on deployment:

Service Provider Access resulted in exception 'oracle.apps.fnd.isg.client.IREPException' when attempting to perform 'DEPLOY'. Please view Service Provider logs for more details

I reviewed log files but nothing informative found. One thing I noticed that I was able to deploy web services with simple out parameters with VARCHAR2 data type. But when there is an out parameter defined based on table type, I am receiving above mentioned error. I defined table type out parameter as follows which returns data in form of json array.

TYPE XRCL_TMS_PICKED_ORDERS1 IS TABLE OF ROCELL.XRCL_TMS_PICKED_ORDERS1%ROWTYPE INDEX BY BINARY_INTEGER;

It would be better to mention that on application with 12c database, web service can be deployed with no issue.

Could anyone advise on how I can auto-mount an EBS volume created using terraform and make it available on /custom

Premise: I'm a bit of a newbie in using Amazon AWS or Linux partitioning in general.

So, I need to train a Tensorflow 2.0 Deep Learning model on a g4dn.4xlarge instance (the one with a signle Nvidia T4 GPU). The setup went smoothly and the machine was correctly initialized. As I see in the configuration of my machine I have:

• 8GB root folder;
• 200GB of storage (that I was able to mount on startup using this guide https://devopscube.com/mount-ebs-volume-ec2-instance/#:~:text=Step%201%3A%20Head%20over%20to,text%20box%20as%20shown%20below)

And here is the result of lsblk:

I have a laravel app hosted on elastic beanstalk and it is also connected with code pipeline. When I deployed the application I got this error on ebs panel:

ERROR: During an aborted deployment, some instances may have deployed the new application version. To ensure all instances are running the same version, re-deploy the appropriate application version.

I don't know if it is related but when I downloaded the logs I found this:

I've read through a lot of questions regarding this error on Stack Overflow, but none of the solutions applied to me.

My application runs without any errors when ran locally. However, when deploying my application to AWS Elastic Beanstalk, I get the following errors, seen when I run eb logs.

According to the documentation:

A PersistentVolume (PV) is a piece of storage in the cluster that has been provisioned ... It is a resource in the cluster just like a node is a cluster resource...

So I was reading about all currently available plugins for PVs and I understand that for 3rd-party / out-of-cluster storage this doesn't matter (e.g. storing data in EBS, Azure or GCE disks) because there are no or very little implications when adding or removing nodes from a cluster. However, there are different ones such as (ignoring hostPath as that works only for single-node clusters):

• csi
• local

which (at least from what I've read in the docs) don't require 3rd-party vendors/software.

But also:

... local volumes are subject to the availability of the underlying node and are not suitable for all applications. If a node becomes unhealthy, then the local volume becomes inaccessible by the pod. The pod using this volume is unable to run. Applications using local volumes must be able to tolerate this reduced availability, as well as potential data loss, depending on the durability characteristics of the underlying disk.

The local PersistentVolume requires manual cleanup and deletion by the user if the external static provisioner is not used to manage the volume lifecycle.

Use-case

Let's say I have a single-node cluster with a single local PV and I want to add a new node to the cluster, so I have 2-node cluster (small numbers for simplicity).

Will the data from an already existing local PV be 1:1 replicated into the new node as in having one PV with 2 nodes of redundancy or is it strictly bound to the existing node only?

If the already existing PV can't be adjusted from 1 to 2 nodes, can a new PV (created from scratch) be created so it's 1:1 replicated between 2+ nodes on the cluster?

Alternatively if not, what would be the correct approach without using a 3rd-party out-of-cluster solution? Will using csi cause any change to the overall approach or is it the same with redundancy, just different "engine" under the hood?

I have the following filter for a datasource to find ami id's for an EC2 instance,