En muchos casos, tu aplicación podría necesitar algunas configuraciones o ajustes externos, por ejemplo, claves secretas, credenciales de base de datos, credenciales para servicios de correo electrónico, etc.

La mayoría de estas configuraciones son variables (pueden cambiar), como las URLs de bases de datos. Y muchas podrían ser sensibles, como los secretos.

Por esta razón, es común proporcionarlas en variables de entorno que son leídas por la aplicación.

* Clean up the kube-proxy container image by removing unnecessary packages and files. ([#42090](https://github.com/kubernetes/kubernetes/pull/42090), [@timstclair](https://github.com/timstclair))
* Better compat with very old iptables (e.g. CentOS 6) ([#37594](https://github.com/kubernetes/kubernetes/pull/37594), [@thockin](https://github.com/thockin))

### Scheduler

specific ports. Use below command to allow access to port 9000 ```sh ufw allow 9000 ``` Below command enables all incoming traffic to ports ranging from 9000 to 9010. ```sh ufw allow 9000:9010/tcp ``` ### firewall-cmd For hosts with firewall-cmd enabled (CentOS), you can use `firewall-cmd` command to allow traffic to specific ports. Use below commands to allow access to port 9000 ```sh firewall-cmd --get-active-zones ``` This command gets the active zone(s). Now, apply port rules to the relevant zones returned...

          "interval": "1m",
          "legendFormat": "{{server}}",
          "refId": "A"
        }
      ],
      "title": "Time Elapsed Since Last Scan (nanos)",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {

* hyperkube

  * The hyperkube image has been slimmed down and no longer includes addon manifests and other various scripts. These were introduced for the now removed docker-multinode setup system. ([#44555](https://github.com/kubernetes/kubernetes/pull/44555), [@luxas](https://github.com/luxas))

## Changelog since v1.5.0-beta.2

### Other notable changes

* Better compat with very old iptables (e.g. CentOS 6) ([#37594](https://github.com/kubernetes/kubernetes/pull/37594), [@thockin](https://github.com/thockin))

auth.us-east-1.amazoncognito.com
auth.us-east-2.amazoncognito.com
auth.us-west-1.amazoncognito.com
auth.us-west-2.amazoncognito.com
authgear-staging.com
authgearapps.com
author
author.aero
auto
auto.pl
autos
av.it
av.tr
avellino.it
averoy.no
averøy.no
avocat.fr
avocat.pro
avocats.bj
avoues.fr
aw
awaji.hyogo.jp
aws
awsapps.com
awsglobalaccelerator.com
ax
axa

#### Lifecycle

- Support for deprecated old kubeadm v1alpha3 config has been totally removed. ([#75179](https://github.com/kubernetes/kubernetes/pull/75179), [@rosti](https://github.com/rosti))
- kube-up.sh no longer supports "centos" and "local" providers. ([#76711](https://github.com/kubernetes/kubernetes/pull/76711), [@dims](https://github.com/dims))

#### Network

* Fixes an issue pulling pod specs referencing unqualified images from docker.io on centos/fedora/rhel ([#53161](https://github.com/kubernetes/kubernetes/pull/53161), [@dims](https://github.com/dims))
* Update kube-dns to 1.14.5 ([#53153](https://github.com/kubernetes/kubernetes/pull/53153), [@bowei](https://github.com/bowei))

  - kube-apiserver <= v1.18.17

**Fixed Versions**:
  - kube-apiserver v1.21.0
  - kube-apiserver v1.20.6
  - kube-apiserver v1.19.10
  - kube-apiserver v1.18.18

This vulnerability was reported by Rogerio Bastos & Ari Lima from RedHat


**CVSS Rating:** Medium (6.5) [CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H)

## Changes by Kind