Hoang Ong hoangong

## intellij-macos
‎‎

## docker.md

      
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                hoangong
                / docker.md
            
            
              Created
              May 28, 2023 20:57
            
              
                useful commands
              
          
    clean up unused images that is older than 30 days:
0 0 * * 0 /usr/bin/docker image prune -a --force --filter "until=$(date -d "30 days ago" +%Y-%m-%d)T00:00:00"


## regex.md

      
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                hoangong
                / regex.md
            
            
              Created
              February 20, 2019 20:25
                — forked from vitorbritto/regex.md
            
              
                Regex Cheat Sheet
              
          
    Regular Expressions

Basic Syntax


/.../: Start and end regex delimiters
|: Alternation
(): Grouping


## how_to_reset_kafka_consumer_group_offset.md

      
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                hoangong
                / how_to_reset_kafka_consumer_group_offset.md
            
            
              Created
              February 11, 2019 19:59
                — forked from marwei/how_to_reset_kafka_consumer_group_offset.md
            
              
                How to Reset Kafka Consumer Group Offset
              
          
    Kafka 0.11.0.0 (Confluent 3.3.0) added support to manipulate offsets for a consumer group via cli kafka-consumer-groups command.

List the topics to which the group is subscribed

kafka-consumer-groups --bootstrap-server <kafkahost:port> --group <group_id> --describe
Note the values under "CURRENT-OFFSET" and "LOG-END-OFFSET". "CURRENT-OFFSET" is the offset where this consumer group is currently at in each of the partitions.

Reset the consumer offset for a topic (preview)


## KeycloakAuthorization.scala
import java.math.BigInteger
import java.security.spec.RSAPublicKeySpec
import java.security.{KeyFactory, PublicKey}
import java.util.Base64

import akka.actor.ActorSystem
import akka.event.LoggingAdapter
import akka.http.scaladsl.Http
import akka.http.scaladsl.model.HttpRequest
import akka.http.scaladsl.model.headers.{Authorization, OAuth2BearerToken}

## build.sh

rm -rf output && mkdir output

bin/./scalapbc \
	--proto_path=/path/your/proto \
    --proto_path=/path/to/googleapis-master/ \ # download from https://github.com/googleapis/googleapis
    --proto_path=/path/to/protobuf-master/src/ \ # download from https://github.com/protocolbuffers/protobuf
    --scala_out=output rpc.proto


## generate.sh
# do this once for server private key:
openssl ecparam -genkey -name prime256v1 -out tls.key

# both server and all clients have to use the same cert file tls.cert
openssl req -new -sha256 \
    -key tls.key \
    -subj "/CN=localhost/O=lnd" \
    -reqexts SAN \
    -config <(cat /etc/ssl/openssl.cnf \
        <(printf "\n[SAN]\nsubjectAltName=DNS:localhost,DNS:aaaa,DNS:bbbb,IP:192.168.1.xxx")) \

## get absoluate current bash folder
PWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

## JVM cert commands
list CAs
keytool -list -keystore $(/usr/libexec/java_home)/jre/lib/security/cacerts

Add new CA
sudo keytool -keystore $(/usr/libexec/java_home)/jre/lib/security/cacerts -importcert -alias new_cert -file cer_file.cer/pem

default pass: changeit

## init.sql
sudo -u postgres psql postgres
CREATE USER testuser WITH PASSWORD '123123';
CREATE DATABASE testdb;
GRANT ALL PRIVILEGES ON DATABASE testdb to testuser;
	import java.math.BigInteger
	import java.security.spec.RSAPublicKeySpec
	import java.security.{KeyFactory, PublicKey}
	import java.util.Base64

	import akka.actor.ActorSystem
	import akka.event.LoggingAdapter
	import akka.http.scaladsl.Http
	import akka.http.scaladsl.model.HttpRequest
	import akka.http.scaladsl.model.headers.{Authorization, OAuth2BearerToken}

	rm -rf output && mkdir output

	bin/./scalapbc \
	--proto_path=/path/your/proto \
	--proto_path=/path/to/googleapis-master/ \ # download from https://github.com/googleapis/googleapis
	--proto_path=/path/to/protobuf-master/src/ \ # download from https://github.com/protocolbuffers/protobuf
	--scala_out=output rpc.proto
	# do this once for server private key:
	openssl ecparam -genkey -name prime256v1 -out tls.key

	# both server and all clients have to use the same cert file tls.cert
	openssl req -new -sha256 \
	-key tls.key \
	-subj "/CN=localhost/O=lnd" \
	-reqexts SAN \
	-config <(cat /etc/ssl/openssl.cnf \
	<(printf "\n[SAN]\nsubjectAltName=DNS:localhost,DNS:aaaa,DNS:bbbb,IP:192.168.1.xxx")) \
	list CAs
	keytool -list -keystore $(/usr/libexec/java_home)/jre/lib/security/cacerts

	Add new CA
	sudo keytool -keystore $(/usr/libexec/java_home)/jre/lib/security/cacerts -importcert -alias new_cert -file cer_file.cer/pem

	default pass: changeit
	sudo -u postgres psql postgres
	CREATE USER testuser WITH PASSWORD '123123';
	CREATE DATABASE testdb;
	GRANT ALL PRIVILEGES ON DATABASE testdb to testuser;