junoteam

package main

import (
	"context"
	"fmt"
	"log"
	"testing"
	"time"

	"github.com/go-redis/redis/v8"

junoteam

resource "digitalocean_droplet" "web" {
  image = "ubuntu-16-04-x64"
  name = "web-1"
  region = "sgp1"
  size = "512mb"
  ssh_keys = [12345]

  connection {
    type = "ssh"
    user = "root"

junoteam

# webapp-ingress
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: webapp
  annotations:
    kubernetes.io/ingress.class: nginx
    # # type of authentication
    # nginx.ingress.kubernetes.io/auth-type: basic
    # # name of the secret that contains the user/password definitions

junoteam

# jenkins-ingress
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: jenkins
  annotations:
    kubernetes.io/ingress.class: nginx
    # type of authentication
    nginx.ingress.kubernetes.io/auth-type: basic
    # name of the secret that contains the user/password definitions

junoteam

apiVersion: v1
kind: List
items:
- apiVersion: v1
  kind: Service
  metadata:
    name: jenkins
    labels:
      app: jenkins
  spec:

junoteam

apiVersion: v1
kind: List
items:
- apiVersion: v1
  kind: Service # K8s Service
  metadata:
    name: simple-web-app-svc
    labels:
      app: simple-web-app
  spec:

junoteam

Killing supervisor if any of it's child processes fail

The trick is to only register the listener for events that indicate failure, namely

• PROCESS_STATE_STOPPED
• PROCESS_STATE_EXITED
• PROCESS_STATE_FATAL

Once they do, we should send a SIGQUIT to Supervisor.

junoteam

package main

import (
	"fmt"
	"syscall"
)

type DiskStatus struct {
	All  uint64 `json:"all"`
	Used uint64 `json:"used"`

junoteam

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

junoteam

Pattern file: /etc/logstash/patterns/nginx Logstash shipper: /etc/logstash/conf.d/shipper.conf

Nginx http log module: http://nginx.org/en/docs/http/ngx_http_log_module.html