geek182

root@server:/opt# curl -v https://packages.cloud.google.com/apt/doc/apt-key.gpg
*   Trying 172.217.28.142...
* TCP_NODELAY set
*   Trying 2800:3f0:4001:815::200e...
* TCP_NODELAY set
* Immediate connect fail for 2800:3f0:4001:815::200e: Cannot assign requested address
*   Trying 2800:3f0:4001:815::200e...
* TCP_NODELAY set
* Immediate connect fail for 2800:3f0:4001:815::200e: Cannot assign requested address
*   Trying 2800:3f0:4001:815::200e...

geek182

#any interface with IP and port 8080 not resolv name
tcpdump -i any  host {{ IP }} and port 8080 -nn

#How to capture VLAN tags that are used by tcpdump
tcpdump -i bond0 -nn -e  vlan

geek182

#links from :
# https://kubernetes.io/docs/concepts/services-networking/service/
# https://kubernetes.io/docs/concepts/services-networking/service/#service-tabs-2 (AWS LOADBALANCE)

Route:
expose a service, so that external clients can reach it by name.

Service:
A Kubernetes service serves as an internal load balancer. 
It identifies a set of replicated pods in order to proxy the connections it receives to them. 

geek182

#Create a user (depends what autentication is config)
# htpasswd -c if is first time for create a file after that just remove -c
sudo htpasswd -c /etc/origin/master/htpasswd devuser

#Create a Group /Role
oc adm groups new groupname

#Get roles bound 
#To view a list of all users that are bound to the project and their roles
 oc get rolebindings

geek182

#get logs from a spefic pod and keep reading with -f flag
kubectl logs -f pod/ghost-1-wjf6m

#Connect to a pod
kubectl exec POD-NAME  --stdin --tty /bin/sh

#execute a command in container, if have more than one inside pod first will be select. 
 kubectl exec 123456-7890 date
 
#Get output from running 'date' in ruby-container from pod 123456-7890

geek182

#link
https://stefanprodan.com/2016/docker-private-registry-nexus-nginx/
https://blog.sonatype.com/using-nexus-3-as-your-repository-part-3-docker-images
https://help.sonatype.com/pages/viewpage.action?pageId=5412197

#Download nexus

#Run nexus

#Configure repo(hosted) for docker

geek182

#EC2
on RHEL7 need install docker for this enable extra rpm repos 

Install guide to running in docker container
https://docs.openshift.org/latest/getting_started/administrators.html#running-in-a-docker-container


--boot-docker-image.sh

#!/bin/bash

geek182

## Install Jenkins plugin
java -jar jenkins-cli.jar -s http://127.0.0.1:8080/ install-plugin slack --username NAME --password PASS

##URL TO DOWNLOAD JENKINS-CLI
localhost:8080/jnlpJars/jenkins-cli.jar

geek182

###
resource "aws_subnet" "public-subnet" {
	count           	= "${length(split(",", lookup(var.azs, var.region)))}"
	vpc_id          	= "${aws_vpc.main.id}"
	cidr_block      	= "${cidrsubnet(var.vpc_cidr, 3,count.index +3 )}"
	availability_zone       = "${element(split(",", lookup(var.azs, var.region)), count.index)}"
	map_public_ip_on_launch = true
	tags {
		Name = "Public-Subnet"
}

geek182

#spefic interface and dont resolve name
tcpdump -n -i eth0

#only tcp
tcpdump -i eth0 tcp

#specific port
tcpdump -i eth0 port 22

#specific src