skyrocknroll

• java -javaagent:jolokia-jvm-1.6.0-agent.jar=port=8888,host=0.0.0.0 -jar target/in.hack4geek.sppring2-1.0-SNAPSHOT.jar
• java -jar jolokia-jvm-1.6.0-agent.jar start <pid/regex> for already running process
• http://localhost:8778/jolokia/read/java.lang:type=Threading/ThreadCount
• Use visualVM or JvisulaVM to get the list of Mbeans.
• Mbean with value http://localhost:8778/jolokia/read/java.lang:name=MarkSweepCompact,type=GarbageCollector
• The order matters java.lang:name=MarkSweepCompact,type=GarbageCollector if you try this java.lang:type=GarbageCollector,name=MarkSweepCompact this fails
• curl "http://localhost:8778/jolokia/read/java.lang:name=MarkSweepCompact,type=GarbageCollector/LastGcInfo/memoryUsageBeforeGc" | jq

skyrocknroll

# -*- mode: ruby -*-
# vi: set ft=ruby :

# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
BOX_IMAGE = "ubuntu/xenial64"
Vagrant.configure("2") do |config|
  # The most common configuration options are documented and commented below.

skyrocknroll

• SHOW TAG VALUES EXACT CARDINALITY WITH KEY = "index";
• SHOW SERIES CARDINALITY group by "measurement"; → Important useful one.
• influxdata/influxdb#8636 → Good examples are here
• influx_inspect report -detailed /var/lib/influxdb/data/envoy/autogen/903 The best way to ficure out high cardinality series.
• figure out series in each database use _internal ; select * from "database" where time > now() - 900s limit 10; Faced this error ERR: cannot delete data. DB contains shards using both inmem and tsi1 indexes. Please convert all shards to use the same index type to delete data.

find /var/lib/influxdb -type d -name index | while read index; do rm -Rf "$index" ; done
influx_inspect buildtsi -database envoy -datadir /var/lib/influxdb/data/ -waldir /var/lib/influxdb/wal

skyrocknroll

package io.opencensus.quickstart;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

skyrocknroll

#!/bin/bash
containers=$(docker ps -q)
for item in $containers
do
  echo $item
  echo $1
 docker exec $item netstat -tapln | grep :26379 | wc -l
done

skyrocknroll

###############################################################################
# Helpful Docker commands and code snippets
###############################################################################

### CONTAINERS ###
docker stop $(docker ps -a -q) #stop ALL containers
docker rm -f $(docker ps -a -q) # remove ALL containers
docker rm -f $(sudo docker ps --before="container_id_here" -q) # can also filter

# exec into container

skyrocknroll

• Iterm2
• Clipy
• liquidprompt
• devd
• ngrok
• secure pipe
• https://github.com/dvorka/hstr
• Install bash because mac ships with very old bash
• Modify Iterm to start with /usr/local/bin/bash
• Modify the f1 keys

skyrocknroll

    beats {
        host => "0.0.0.0"
        port => "5044"
    }
}

filter {
   if [fields][log_producer] == "envoy" {
 grok {

skyrocknroll

### KERNEL TUNING ###

# Increase size of file handles and inode cache
fs.file-max = 2097152

# Do less swapping
vm.swappiness = 10
vm.dirty_ratio = 60
vm.dirty_background_ratio = 2

skyrocknroll

curl -L -s 'https://registry.hub.docker.com/v2/repositories/envoyproxy/envoy/tags?page_size=100&page=4'|jq '."results"[]["name"]'