Introduction

In order to restore cluster successfully from failure, we create scheduled backup job. Kubernetes natively support cronjobs, so we are going to use that feature for our workflow.

Workflow is divided into three stages:

Lets get started…

Build Docker Image

Create Dockerfile with a following content (see below). Notice “ARG” parameter, this helps us to add version control our builtin tool.

FROM alpine:latest

ARG ETCD_VERSION=v3.4.13

ENV ETCDCTL_ENDPOINTS "https://127.0.0.1:2379"
ENV ETCDCTL_CACERT "/etc/kubernetes/pki/etcd/ca.crt"
ENV ETCDCTL_KEY "/etc/kubernetes/pki/etcd/healthcheck-client.key"
ENV ETCDCTL_CERT "/etc/kubernetes/pki/etcd/healthcheck-client.crt"

RUN apk add --update --no-cache bash ca-certificates tzdata openssl

RUN wget https://github.com/etcd-io/etcd/releases/download/${ETCD_VERSION}/etcd-${ETCD_VERSION}-linux-amd64.tar.gz \
&& tar xzf etcd-${ETCD_VERSION}-linux-amd64.tar.gz \
&& mv etcd-${ETCD_VERSION}-linux-amd64/etcdctl /usr/local/bin/etcdctl \…

LinuxSkillShare

Certified Kubernetes Administrator (CKA) & Linux System Administrator & CI/CD Integrations & Big Data: Apache Hadoop & Automating: Ansible, Bash, Python

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