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bash: wait database for connection

№ 10430 В разделе "Администрирование" от December 6th, 2019,

You can easily use it to check MySQL or Postgresql connection.

#!/bin/bash

for i in `seq 1 ${CONNECT_TIMEOUT}`;
do
  mysql -h "${DB_HOST}" -u${DB_USERNAME} -p${DB_PASSWORD} ${DB_DATABASE} -e 'select 1'
  if [ $? -eq 0 ]; then
    echo "Connected to MySQL"
    exit 0
  fi
  if [ $i -eq ${CONNECT_TIMEOUT} ]; then
    echo "MySQL timeout"
    exit 1
  fi
  sleep 1
done

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Private Docker Registry in DigitalOcean Kubernetes with s3 storage in Spaces

№ 10420 В разделе "Администрирование" от December 4th, 2019,

Prepare Configmap with auth information. Use command htpasswd -Bbn vlad 123 to create login and password for users. No need to restart all pods of registry to apply changes. May be you want to store it in Secret resource, at your choice.

Example:

---
apiVersion: v1
kind: ConfigMap
metadata:
  creationTimestamp: null
  name: registry-auth
data:
  htpasswd: |
    vlad:$2y$05$anFCx3pAPG/BNxPsEKcau.LPKjWFN7hHkoXbvIMp7Jie97uYafuSq

Now create bucket my-own-registry in Spaces with access key id and secret key. Do not forget to set http_secret and nodeSelector. http_secret required if you want multiple pods.

Example:

---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: registry
spec:
  replicas: 2
  template:
    metadata:
      labels:
        name: registry
    spec:
      containers:
      - name: registry
        image: registry:2
        ports:
        - name: registry
          containerPort: 5000
        volumeMounts:
        - mountPath: /auth
          name: auth
        env:
        - name: REGISTRY_HEALTH_STORAGEDRIVER_ENABLED
          value: "false"
        - name: REGISTRY_AUTH
          value: "htpasswd"
        - name: REGISTRY_AUTH_HTPASSWD_REALM
          value: "Registry Realm"
        - name: REGISTRY_AUTH_HTPASSWD_PATH
          value: /auth/htpasswd
        - name: REGISTRY_STORAGE
          value: "s3"
        - name: REGISTRY_STORAGE_S3_ACCESSKEY
          value: "TVV3WXZ233MEPEBXFP7X"
        - name: REGISTRY_STORAGE_S3_SECRETKEY
          value: "ERlofd+hb9Ps1oBR5jUJuPa9NIMRSLxvUyulKJnt8S0"
        - name: REGISTRY_STORAGE_S3_BUCKET
          value: "my-own-registry"
        - name: REGISTRY_STORAGE_S3_REGION
          value: "fra1"
        - name: REGISTRY_STORAGE_S3_REGIONENDPOINT
          value: "https://fra1.digitaloceanspaces.com"
        - name: REGISTRY_LOG_LEVEL
          value: "info"
        - name: REGISTRY_HTTP_ADDR
          value: "0.0.0.0:5000"
        - name: REGISTRY_HTTP_SECRET
          value: sexy_pony
        resources:
          limits:
            cpu: 100m
            memory: 200Mi
          requests:
            cpu: 50m
            memory: 50Mi
      volumes:
      - name: auth
        configMap:
          name: registry-auth
      nodeSelector:
        doks.digitalocean.com/node-pool: infra

Last step easily shares registry. Set limit for image size in proxy-body-size, value 0 means no limits.

Example:

---
apiVersion: v1
kind: Service
metadata:
  name: registry
  labels:
    name: registry
spec:
  ports:
  - port: 80
    targetPort: registry
    protocol: TCP
    name: registry
  selector:
    name: registry
  type: ClusterIP

---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    certmanager.k8s.io/cluster-issuer: letsencrypt-prod
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/proxy-body-size: "0"
  name: registry
spec:
  rules:
  - host: registry.k8s.blindage.org
    http:
      paths:
      - backend:
          serviceName: registry
          servicePort: registry
        path: /
  tls:
  - hosts:
    - k8s.blindage.org
    - '*.k8s.blindage.org'
    secretName: k8s-blindage-tls

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Вытяжка со 120 мм вентилятором и трубой 100 мм

№ 10039 В разделе "3D printing" от December 1st, 2019,

Модель вытяжки https://www.thingiverse.com/thing:4011854
Решетка на вентилятор https://www.thingiverse.com/thing:2802474

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Корпус для Raspberry Pi (model B)

№ 10409 В разделе "3D printing" от November 26th, 2019,

https://www.thingiverse.com/thing:608169

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Import DNS resources from DigitalOcean to Terraform

№ 10401 В разделе "Администрирование" от November 19th, 2019,

At first, create digitalocean.tf with auth token if you do not have one.

Carefully read documentation:

https://www.terraform.io/docs/providers/do/r/domain.html

https://www.terraform.io/docs/providers/do/r/record.html

Now prepare domains.tf with resources declaration:

resource "digitalocean_domain" "k8s_blindage_org" {
  name = "k8s.blindage.org"
}

resource "digitalocean_record" "k8s_blindage_org_ns1" {
  domain = digitalocean_domain.k8s_blindage_org.name
  type   = "NS"
  name   = "@"
  value  = "ns1.digitalocean.com."
}

resource "digitalocean_record" "k8s_blindage_org_ns2" {
  domain = digitalocean_domain.k8s_blindage_org.name
  type   = "NS"
  name   = "@"
  value  = "ns2.digitalocean.com."
}

resource "digitalocean_record" "k8s_blindage_org_ns3" {
  domain = digitalocean_domain.k8s_blindage_org.name
  type   = "NS"
  name   = "@"
  value  = "ns3.digitalocean.com."
}

Authorize and receive list of records with IDs:

export DO_TOKEN=fed82d66020b4ccfa67d53d45a519fuck6d3you0c946a9cd196f1062195a7993
curl -X GET https://api.digitalocean.com/v2/domains/k8s.blindage.org/records -H "Authorization:Bearer ${DO_TOKEN}"

Now you are ready to import current state with record IDs from previous step:

terraform import digitalocean_domain.k8s_blindage_org k8s.blindage.org
terraform import digitalocean_record.k8s_blindage_org_ns1 k8s.blindage.org,80019903
terraform import digitalocean_record.k8s_blindage_org_ns2 k8s.blindage.org,80019904
terraform import digitalocean_record.k8s_blindage_org_ns3 k8s.blindage.org,80019905

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