Have been using Fedora as my desktop OS for quite some time now. Here are some of the thigns that has helped: Use Snap and Flatpak My preferred way of installing applications is through Snap, Flatpak, Homebrew first and if they are not available in these channels, then only I revert to rpm Use Zsh Bash is the default shell in these OS. If youo are using for daily use, zsh helps a lot Install...
A very nifty and quick way to compare two mysql databases is to use mysqldump command. This also works well if you just want to compare DDL mysqldump -d --skip-comments --skip-extended-insert -u root -p -h mysql.host db1 > db1.sql mysqldump -d --skip-comments --skip-extended-insert -u root -p -h mysql.host db2 > db2.sql diff db1.sql db2.sql
If you have recently moved towards Kubernetes from EC2 and getting forbidden error while accessing AWS services make sure to have aws-sts in classpath. In nutshell, the following dependency must be present <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-sts --> <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-java-sdk-sts</artifactId> <version>1.12.136</version> </dependency> The corresponding dependency for the AWS SDK v2 will be <!-- https://mvnrepository.com/artifact/software.amazon.awssdk/sts --> <dependency> <groupId>software.amazon.awssdk</groupId> <artifactId>sts</artifactId> <version>2.16.24</version> <scope>test</scope> </dependency> This is because the credential provider which is concerned with loading the credentials from EKS role...
If you want to provision a test redis cluster for yourself, I recently created an automated solution using Vagrant and Ansible Git clone the repository https://github.com/madhur/redis-cluster-vagrant and use vagrant up command to bring up the five Centos 7 nodes. Once the nodes are up, the ansible playbook setup-redis.yml can be executed which will install redis on all the five nodes. ansible-playbook playbooks/setup-redis.yml The ansible playbook provisions four redis process on each node running on different...
If you want to proxy all Nodejs HTTP requests through a proxy server, just like JVM’s -Dhttp.proxyHost=127.0.0.1 -Dhttp.proxyPort=8888 Here is the quickest solution, without modifying the application source code npm i global-agent export GLOBAL_AGENT_HTTP_PROXY=http://127.0.0.1:8888 node -r 'global-agent/bootstrap' app.js This will enable you to proxy all requests through proxy server running at 127.0.0.1 on port 8888, which could be Charles or Burp
Recently, I upgraded my personal computer CPU from Intel Core i7 2600K (SandyBridge) to AMD Ryzen 5600x The older processor was a decade old and the accompanying board didn’t support new age SSDs such as Nvme PCI 4 SSD However, post upgradation, as soon as I booted my existing system running CentOS 7, I recieved a dreaded kernel panic very similar to BSOD in Windows Turns out that latest AMD processors are not supported on...
In most of the modern web REST implementations, much of the task is spent waiting on IO, for example waiting for data to be fetched from database or through remote REST service. When the application receives high traffic on a thread based application server, such as Tomcat, much of its threads are just waiting for data to come from database or remote REST service. This is inefficient because, you cannot increase the number of threads...
Conventional Commits is a an effort to standardizing writing better git commit messages. As per it, a commit message should be structured as follows <type>[optional scope]: <description> [optional body] [optional footer(s)] We recently standardized writing commit messages in our team according to this spec. This can be even forced through git commit hooks #!/bin/sh commit_regex_normal="(((feat|docs|style|refactor|perf|test|build|ci|chore|revert)(\((\w{0,15})\))?))(\:.*\S.*)"; commit_regex_bug_fix="(((Fix)(\((\w{0,15})\))?))(\:)([A-Z]+-[0-9]+:)(.*\S.*)"; commit_regex_auto_gen="(Merge.*)|(Revert.*)"; o="|" commit_regex="$commit_regex_normal$o$commit_regex_bug_fix$o$commit_regex_auto_gen" error_msg=' /‾‾‾‾‾‾‾‾ < Please use semantic commit messages(see https://www.conventionalcommits.org/en/v1.0.0 ) \________ <type>[<scope>]: <short summary> │ |...
Recently, I had a requirement of querying AWS Application Load Balancer Logs to get some data around request/ sec and p95 latencies. The Application load balancer logs are stored in AWS S3 by default and follows a consistent format which is documented here AWS Athena is the best tool to query such logs. Best practices using AWS Athena Make sure you specify the time period when querying Athena, else the data scanned will be very...
Recently, we had to make alterations directly to production cassandra tables due to an urgent bug fix and required to backup and restore specific cassandra tables so that we could roll back incase something gone wrong. Backup and restoring tables is seamless using nodetool and sstableloader Cassandra table backup steps Login to Casandra Box Execute the following commands from the cassandra bin directory ./nodetool snapshot -cf <tablename> <keyspace> Repeat the same for any other table...