INT 21h

Hi, I am Vladimir Smagin, SysAdmin and

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Fast bootstrap of Operator SDK and your first project

№ 10268 В разделе "Programming" от August 30th, 2019,
В подшивках: Go, Operator SDK

1) Install operator-sdk on your computer https://github.com/operator-framework/operator-sdk/blob/master/doc/user/install-operator-sdk.md. I prefer to install into $GOPATH/bin.
2) create script somewhere like /opt/bootstrap_operator.sh

#!/bin/bash
set -e

REPO="git.blindage.org/21h/redis-operator"
API_VERSION="blindage.org/v1alpha1"
KIND="Redis"
NAME="redis-operator"

# operator sdk
export GO111MODULE=on
echo "Bootstraping ${NAME}"
operator-sdk new ${NAME} --git-init --repo ${REPO} --verbose
cd ${NAME}
echo "Adding API ${API_VERSION}"
operator-sdk add api --api-version=${API_VERSION} --kind=${KIND} --verbose
echo "Creating controller"
operator-sdk add controller --api-version=${API_VERSION} --kind=${KIND} --verbose

3) change directory to your “~/dev” and run script bash /opt/bootstrap_operator.sh, it will create new directory “~/dev/redis-operator”

4) build your new operator, pack to image operator-sdk build redis-operator

5) push new image to registry with docker push myregistry.ru/redis-operator

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Redis operator for Kubernetes

№ 10254 В разделах: Programming Sysadmin от August 27th, 2019,
В подшивках: Go, Kubernetes, Kubernetes Operator, Operator SDK, Redis

Redis operator runs Sentinel and Redis, makes Redis high available with HAProxy.

https://git.blindage.org/21h/redis-operator

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MQTT operator for Kubernetes

№ 10248 В разделах: Programming Sysadmin от August 23rd, 2019,
В подшивках: Go, Kubernetes, Kubernetes Operator, MQTT, Operator SDK

Run multiple MQTT instances in your Kubernetes cluster. Can store persistent database.

Documentation and download here https://git.blindage.org/21h/mqtt-operator

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Django operator for Kubernetes

№ 10240 В разделах: Programming Sysadmin от August 22nd, 2019,
В подшивках: Django, Go, Kubernetes, Kubernetes Operator, Operator SDK

You can run projects with collectstatic and migrations at init stage, provide ENVs, service and pods annotations.

https://git.blindage.org/21h/django-operator

Full Spec:

image specific settings

PullPolicy: imagePullPolicy, default IfNotPresent
Image: string, required, format “image:tag”
Replicas: integer, default 1

manage resources

Read more about resources limiting here https://kubernetes.io/docs/concepts/policy/resource-quotas/

PodRequests: default is empty
PodLimits: default is empty

Affinity and antiaffinity manual https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity

Affinity: default is empty

set annotations to service and pod

ServiceAnnotations: key: value dict, default is empty
PodAnnotations: key: value dict, default is empty

application specific configuration

AppPort: integer, internal application port, default 8000
AppEnv: EnvVar array, default is empty
AppStaticPath: string, path to static files, default /app/static
RunMigrate: bool, run migrations at init stage, default False
RunCollectStatic: bool, run collectstatic at init stage, default False

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WordPress operator for Kubernetes

№ 10224 В разделах: Programming Sysadmin от August 18th, 2019,
В подшивках: Go, Kubernetes, Kubernetes Operator, Operator SDK, Wordpress

Run multiple WordPress instances in your Kubernetes cluster. Use internal or external database. Internal database means a single pod with MariaDB without any replication or clusterization, my WordPress operator is NOT MySQL operator. If you need database high availability use MySQL operator to create cluster.