alonisser

FROM python:3.6-alpine
# Opted for alpine to get a lean docker image as possible
RUN apk add --no-cache openssl

ENV DOCKERIZE_VERSION v0.6.1
RUN wget https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-alpine-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
    && tar -C /usr/local/bin -xzvf dockerize-alpine-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
    && rm dockerize-alpine-linux-amd64-$DOCKERIZE_VERSION.tar.gz

# Python deps for alpine

alonisser

#Broken somehow. need to fix
SELECT COUNT(*) as datname, datname, datid FROM pg_stat_activity GROUP BY datname;
#Works without id
SELECT COUNT(*) as datname, datname FROM pg_stat_activity GROUP BY datname;

More info:
http://chrismiles.info/systemsadmin/databases/articles/viewing-current-postgresql-queries/

https://support.pivotal.io/hc/en-us/articles/201595093-Script-Session-level-information

alonisser

sudo apt-add-repository ppa:ansible/ansible
sudo apt-get update
sudo apt-get install ansible
mkdir automation && cd automation
touch ansible.cfg && hosts
mkdir -pv roles/aws_monitoring/tasks/main.yml

alonisser

echo iptables-persistent iptables-persistent/autosave_v4 boolean true | sudo debconf-set-selections
echo iptables-persistent iptables-persistent/autosave_v4 boolean true | sudo debconf-set-selections

sudo apt-get -y install iptables-persistent

alonisser

{
  "title": "Nginx Web",
  "services": {
    "query": {
      "list": {
        "0": {
          "query": "response:[200 TO 299]",
          "alias": "OK",
          "color": "#7EB26D",
          "id": 0,

alonisser

job import plugin

scripts

alonisser

cost of data structures

notes on redis memory usage - the previous is based on this post

redis memory optimization page

Interesting post by instagram engineering on this subject

The profiling tool: rdb tools

alonisser

1. replace apt-get upgrade to install only security patches:

http://askubuntu.com/questions/194/how-can-i-install-just-security-updates-from-the-command-line

2. use unattended-upgrade
3. automate unattended-upgrade with cron 
https://help.ubuntu.com/community/AutomaticSecurityUpdates

4. get alerts about pending updates:

alonisser

check redis log /var/logs/redis/redis-server.log for write errors  

can be permissions on the redis dbump dir or memory conditions or not enough place on disk

check place on disks:

http://www.cyberciti.biz/faq/check-free-space/
```
$ df -h
```

alonisser

##Redis
change redis conf in remote server


```
vim /etc/redis/redis.conf
# change the original to this line
bind 0.0.0.0
```