vadirajks

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vadirajks

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vadirajks

• VARS Operations

  • Create dict based on dict
  • Create List of public IPs of the ansible control host

• Template Operations

• Tasks Operations

• DigitalOcean

  • Ensure SSH KEY of Ansible Control Machine exists at DigitalOcean

• Hosts Operations

vadirajks

#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your **location** block(s):
#
#   include cors_support;
#
# As of Nginx 1.7.5, add_header supports an "always" parameter which

vadirajks

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

vadirajks

 kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test 

vadirajks

Table of Contents

• 0.1. References
  • 0.2. Other cheatsheets
  • 0.3. Manage multiple gcloud config configurations
    • 0.3.1. Switch gcloud context with gcloud config
  • 0.4. Auth
• 0.5. info

vadirajks

# Elasticsearch Cheatsheet - an overview of commonly used Elasticsearch API commands

# cat paths
/_cat/allocation
/_cat/shards
/_cat/shards/{index}
/_cat/master
/_cat/nodes
/_cat/indices
/_cat/indices/{index}

vadirajks

locals {
  max_subnet_length = max(
    length(var.private_subnets),
    length(var.elasticache_subnets),
    length(var.database_subnets),
    length(var.redshift_subnets),
  )
  nat_gateway_count = var.single_nat_gateway ? 1 : var.one_nat_gateway_per_az ? length(var.azs) : local.max_subnet_length

  # Use `local.vpc_id` to give a hint to Terraform that subnets should be deleted before secondary CIDR blocks can be free!

vadirajks

graphql

• https://services.github.com/on-demand/graphql/
• https://github.com/blog/2412-learn-graphql-with-githubf
• https://www.graph.cool

regex

• https://github.com/zeeshanu/learn-regex
• http://regexpcrashcourse.com/
• http://regexr.com/