tsaarni

*** RSA

# Generate self-signed certificate with RSA 4096 key-pair
openssl req -x509 -nodes -days 3650 -newkey rsa:4096 -keyout rsakey.pem -out rsacert.pem

# print private and public key
openssl rsa -in rsakey.pem -text -noout

# print certificate
openssl x509 -in rsacert.pem -text -noout

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

armon

Consul Consistency

As Kyle brought up, Consul at the moment has a single known case of a potential inconsistency (Could be unknown cases lurking). Currently Consul works by electing a leader, who "leases" the position for LeaderLeaseTimeout interval. At each interval, it checks that a quorum of nodes still believes it to be the leader. At the same time, if a follower does not hear from the leader within randomInterva(HeartbeatTimeout, 2 * HeartbeatTimeout), it will start a new election.

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

jasonwryan

# Notes for installing on Samsung Series 9
# UEFI boot: LVM on LUKS
#
# See the full blog post:
# http://jasonwryan.com/blog/2013/01/25/uefi/

# check you are booted in uefi
modprobe efivars
ls /sys/firmware/efi/vars