A Technical I.T./DevOps Blog
Problem scenario
You have a server in AWS that is in a VPC. You want it to access an S3 bucket. How do you do this?
Solution
Use a VPC endpoint, specifically, use a Gateway Endpoint.
Source: https://docs.aws.amazon.com/vpc/latest/userguide/vpc-endpoints.html
…
Continue reading “How Do You Securely Connect an EC-2 Instance in a VPC to a DynamoDB?”
Problem scenario
Using the AWS Management Console, you want to view the ELBs that you have. What do you do?
Solution
Go here:
https://console.aws.amazon.com/ec2/v2/home?#LoadBalancers:sort=loadBalancerName
…
Continue reading “How Do You Find the Elastic Load Balancers in the AWS Web UI?”
Updated 11/9/17
Problem scenario
In AWS or Azure you have Linux instances that you want to be configured to use a Chef Server. How do you install Chef client and configure it to work with a Chef server?
Solution
These directions have been tested in Azure (with an Ubuntu 16.x server as either the Chef client node or the Chef server) and AWS (with a Red Hat Enterprise Linux 7.x server as the Chef client node or the Chef server).
…
Continue reading “How Do You Install and Configure Chef Client on a Linux Server in AWS or Azure?”
Problem scenario
You have a server in AWS that is in a VPC. You want it to access an S3 bucket. How do you do this?
Solution
Use a VPC endpoint, specifically, use a Gateway Endpoint.
Source: https://docs.aws.amazon.com/vpc/latest/userguide/vpc-endpoints.html
…
Continue reading “How Do You Securely Connect an EC-2 Instance in a VPC to an S3 Bucket?”
Problem scenario
kubectl commands are failing with an error message like this: “Unable to connect to the server: dial tcp: lookup ABCD123EFG.gr7.us-west-1.eks.amazonaws.com on x.x.x.x:53: no such host”
How do you get kubectl commands to work?
Possible Solution #1
If you are using EKS and you have the name of the cluster (e.g., “foobar”), run a command like this:
aws eks update-kubeconfig –name foobar
Possible Solution #2
…
Problem scenario
You run a kubectl command, but you receive one of the following error messages:
Warning FailedScheduling default-scheduler no nodes available to schedule pods
No resources found
What should you do?
Possible Solution #1
Did the control plane lose connectivity with the worker nodes? An intermediate network device such as a firewall may have been implemented.
…
Problem scenario
In the AWS Management Console, you cannot add a Node to an EKS cluster. The “Node IAM Role” never has any option. You click the “refresh” arrow, but all you see is “No roles found. Follow the link above to create a new role.” What should you do?
Solution
1. Install and configure the AWS CLI. If you need assistance with this,
…
One of the following apply:
Problem scenario #1
You are using EKS and you have no config file in the .kube directory. You want to run some kubectl commands.
Problem scenario #2
You are using EKS and run a kubectl command, but you get this error: “The connection to the server localhost:8080 was refused – did you specify the right host or port?”
Solution
Run a command like this (but replace “us-west-1” with your region and replace “foobar” with the cluster_name):
aws eks –region us-west-1 update-kubeconfig –name foobar
…
Continue reading “How Do You Create a .kube/config File with a “aws eks” Command?”
Problem scenario
You are running an aws ssm command. You receive a message about an error when parsing amazon-cloudwatch-agent.toml that also says ‘”/usr/share/collectd/types.db” no such file or directory’. What do you do?
Solution
Install collectd. If you are using a RedHat derivative of Linux (e.g., Fedora or CentOS), run this: sudo yum -y install collectd
…
Problem scenario
You want to create EC-2 instances (nodes) for Kubernetes in AWS using EKS. You want to be able to connect to them or log into them for the sake of troubleshooting. You want to configure the Kubernetes nodes to use a .pem or .ppk file for SSHing into them. You analyzed the create node group documentation on the internet, but found a vague reference to a –remote-access flag and a ec2Sshkey pointing to a string.
…
Continue reading “How Do You Create Nodes for EKS That Are Accessible to Log in?”