I did not realize that Today is the 7 years anniversary of my tech blog 'Jackie Chen's IT workshop', until I received the achievement award from WordPress. It is interested to find out my first blog article is 'Allow owner to manage distribution list in Exchange 2010'. Not sure how many organisations are still running … Continue reading 7 Years Anniversary of the blog
Do you know how many Amazon issued certificates (ACM) or user uploaded certificates (IAM) in your AWS accounts? How many certificates have been deployed to production in your Akamai contracts? Not sure about you, but I don't know the answer. So I wrote a tool called CertStuff to get all those information (common name, SAN, … Continue reading CertStuff
New year new resolutions. I have just setup a 2 weeks challenge for myself - get the 'AWS Certified Solution Architect - Associate'. Exam has been booked for 31/Jan, no prep has been done yet. Updates: 16/Jan: book exam for 31/Jan 31/Jan: PASS References: AWS Certified Solutions Architect Associate Exam Blueprint A curated list of AWS … Continue reading 2 Weeks Challenge of ‘AWS Certified Solutions Architect – Associate’
I wrote my first Python crawler. It can automatically download my daughter's daily reflections from her school's portal (iParent). No more clicking in their website 🙂 If you are interested, here is the source code.
At the time of writing, there are 3 types of Elastic Load Balancer: CLB (Classic Load Balancer), ALB (Application Load Balancer) and NLB (Network Load Balancer). AWS releases CLB first, then ALB, thats why CLB sometimes is referred as ELB-V1, and ALB is referred as ELB-V2. Then NLB comes as the latest release. From my … Continue reading AWS ELB: CLB vs ALB vs NLB
I guess you have heard the name of Meltdown and Spectre already. If not, check out this site https://meltdownattack.com/. Definitely, it is not a good start of a New Year. All Cloud providers are busy with patching the kernel of their underlying systems. AWS Elastic cache (Redis) is one of them. Due to its single threaded nature, … Continue reading Redis CPU Usage Ramps Up after Kernel Patching
There are two types of AWS Lambda networking settings: No VPC and VPC-based. The major difference is that VPC-based Lambda allows you to access the resources in your VPC, e.g your EC2 resources sitting in the private subnets. No VPC lambda only can access Internet by default. Before you choose to use VPC-based lambda, there … Continue reading Things you need to know about AWS VPC based Lambda