Fabian Lee : Software Engineer

GKE: Determine Anthos on-prem GKE master node and IP address

March 25, 2023
Categories: Hyperscaler, Kubernetes

If you are using Anthos GKE on-premise and need to determine which node of your Admin Cluster is the master, query for the master role. The label is ‘node-role.kubernetes.io/master’. $ kubectl get nodes -l node-role.kubernetes.io/master NAME STATUS ROLES AGE VERSION gke-admin-master-adfwa Ready control-plane,master 7d v1.24.9-gke.100 # using wide will also show External and Internal IP … GKE: Determine Anthos on-prem GKE master node and IP address

GCP: list of available GKE cluster versions in region and channel

January 12, 2023
Categories: Hyperscaler

If you are going to create a GKE cluster in a region, you may need to be explicit with the version of the master control plane and worker nodes. Below is how you would list the available versions. # specify your region region=us-east1 gcloud container get-server-config –region=$region

SaltStack: Installing a Salt Master on Ubuntu Xenial

June 25, 2018
Categories: Automation, DevOps

Configuration Management tools like SaltStack are invaluable for managing infrastructure at scale. Even in the growing world of containerization where immutable image deployment is the norm, those images need to be built in a repeatable and auditable fashion. This article will detail installation of the SaltStack master on Ubuntu Xenial 16.04, with validation using a single Minion. Note that … SaltStack: Installing a Salt Master on Ubuntu Xenial

SaltStack: Installing an older Salt Master or Minion for compatibility

October 6, 2017
Categories: Automation, Linux

If your Salt Minion version is too far removed from the Salt Master version, you may find yourself with unexplained errors. This problem can be faced when the OS template you are deploying was packaged years earlier with an older Salt minion while the Salt Master has been kept up to date. But it can … SaltStack: Installing an older Salt Master or Minion for compatibility

GoLang: Vendor directory for github branches other than master

May 16, 2017
Categories: Scripting

Using 3rd party packages from github is made very simple in the Go language with the import statement. But one problem is that “go get” will always pull the HEAD of the master branch and there is no way to explicitly specify another branch. The ultimate answer would be to use a package dependency manager like Glide, which … GoLang: Vendor directory for github branches other than master

SaltStack: Installing a Salt Master on Ubuntu 14.04

May 12, 2017
Categories: DevOps, Linux

Configuration Management tools like SaltStack are invaluable for managing infrastructure at scale. Even in the growing world of containerization where immutable image deployment is the norm, those images need to be built in a repeatable and auditable fashion. This article will detail installation of the SaltStack master on Ubuntu 14.04, with validation using a single Minion. Note that Minion … SaltStack: Installing a Salt Master on Ubuntu 14.04

ELK: Scaling an ElasticSearch Cluster

November 28, 2016
Categories: DevOps

The heart of the ELK stack is Elasticsearch. In order to provide high availability and scalability, it needs to be deployed as a cluster with master and data nodes. The Elasticsearch cluster is responsible for both indexing incoming data as well as searches against that indexed data. Resources As described in the documentation, if there … ELK: Scaling an ElasticSearch Cluster