Sunday, February 16, 2020

Mi curso en udemy!

Con gran alegría, les comento que he publicado mi curso de dockers, openshift y redhat en udemy!

Wednesday, June 19, 2019

MYSQL persistente con NFS

1) Lo primero, tratamos de crear un yaml de mentira,

kubectl run --image=mysql --dry-run -o yaml > mysql.yml

total, el que vamos a pegar, ya tiene todo resuelto. Nos fatla ver las diferencias. Para esto, como queremos que sea persistente, lo vamos a hacer via NFS, corriendo en el master.
Lo que necesitamos es:

A) Crear el PVC
B) Crear EL PV
C) Crear el MYSQL

vamos por el A

apiVersion: v1
kind: PersistentVolume
metadata:
  name: lab-vol
spec:
  capacity:
    storage: 10Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Recycle
  nfs:
    path: /var/nfs/general
    server: qqmelo1c.mylabserver.com
    readOnly: false


Defini un nfs server. Recordar que es importantisimo que tengamos andando el nfs-common en ambos workers.

Ahora el PVC.

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-pvc
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 1Gi


y ahora el servicio persistente de mysql


aca defino un servicio, que luego lo cambiare, con su respectivo almacenamiento persistente

kind: Service
metadata:
  name: mysql
spec:
  ports:
  - port: 3306
  selector:
    app: mysql
  clusterIP: None
---
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - image: mysql:5.6
        name: mysql
        env:
          # Use secret in real usage
        - name: MYSQL_ROOT_PASSWORD
          value: password
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: nfs-pvc

ACL Haproxy

root@qqmelo1c:~/postgres# cat /etc/haproxy/haproxy.cfg
global
        log /dev/log    local0
        log /dev/log    local1 notice
        chroot /var/lib/haproxy
        stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
        stats timeout 30s
        user haproxy
        group haproxy
        daemon

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # Default ciphers to use on SSL-enabled listening sockets.
        # For more information, see ciphers(1SSL). This list is from:
        #  https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
        # An alternative list with additional directives can be obtained from
        #  https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=haproxy
        ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS
        ssl-default-bind-options no-sslv3

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorfile 503 /etc/haproxy/errors/503.http
        errorfile 504 /etc/haproxy/errors/504.http


listen 3.16.21.136
    bind *:80
    mode http
    stats enable
    stats auth  cda:cda
    balance roundrobin
    option forwardfor
    #acl is_for_backend2 path_reg ^$|^/$|^/nodos|^/bpages
    acl is_for_backend2 path_beg -i /nodos
    use_backend backend2 if is_for_backend2

    default_backend backend1

    backend backend1
    server worker2 172.31.100.16:31759  check  #IP Privada frontal-01
    server worker1 172.31.104.150:31759  check #IP Privada frontal-01

    backend backend2
    server worker2 172.31.100.16:30737  check  #IP Privada frontal-01
    server worker1 172.31.104.150:30737  check #IP Privada frontal-01

Thursday, June 13, 2019

HAPROXY - K8s

En el nodo master, instale el haproxy.

Dejo el fichero de configuracion


global
        log /dev/log    local0
        log /dev/log    local1 notice
        chroot /var/lib/haproxy
        stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
        stats timeout 30s
        user haproxy
        group haproxy
        daemon

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # Default ciphers to use on SSL-enabled listening sockets.
        # For more information, see ciphers(1SSL). This list is from:
        #  https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
        # An alternative list with additional directives can be obtained from
        #  https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=haproxy
        ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS
        ssl-default-bind-options no-sslv3

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorfile 503 /etc/haproxy/errors/503.http
        errorfile 504 /etc/haproxy/errors/504.http


listen 192.168.0.140
    bind *:80
    mode http
    stats enable
    stats auth  cda:cda
    balance roundrobin
    option forwardfor
    server worker1 192.168.0.141:30224  check  #IP Privada frontal-01
    server worker2 192.168.0.142:30224  check #IP Privada frontal-01





es algo asi como