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Dockerfile for Nginx Unit projects

№ 10453 В разделе Sysadmin от December 16th, 2019,
В подшивках: Docker, Unit

Place unit_config.json file in project root directory, it will be moved to /state during image building. Find example configs by hash tag #unit.

Do not forget to change timezone and packages to install.

FROM ubuntu:eoan

ENV TZ=Asia/Tomsk
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

RUN set -xe \
    && apt-get -y update \
    && apt-get -y install --no-install-recommends gnupg2 curl php mysql-client ca-certificates \
    php-curl php-mysql \
    && curl https://nginx.org/keys/nginx_signing.key | apt-key add - \
    && echo "deb https://packages.nginx.org/unit/ubuntu/ eoan unit"  | tee -a /etc/apt/sources.list \
    && echo "deb-src https://packages.nginx.org/unit/ubuntu/ eoan unit" | tee -a /etc/apt/sources.list \
    && apt-get -y update \
    && apt-get -y install unit unit-php unit-dev \
    && unitd --version

RUN rm /etc/init.d/unit

WORKDIR /www/app

COPY . .

RUN mkdir -p /state/certs && mv unit_config.json /state/conf.json \
    && chmod 700 -R /state && chown root:root -R /state
RUN chown -R www-data:www-data /www/app

CMD ["unitd", "--no-daemon", "--state", "/state"]

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Private Docker Registry in DigitalOcean Kubernetes with s3 storage in Spaces

№ 10420 В разделе Sysadmin от December 4th, 2019,
В подшивках: DigitalOcean, Docker, Kubernetes

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_STORAGE_DELETE_ENABLED
          value: "true"
        - 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

Problems:

time="2019-12-14T22:03:19.448702167Z" level=info msg="PurgeUploads starting: olderThan=2019-12-07 22:03:19.439373039 +0000 UTC m=-601559.638413974, actuallyDelete=true" panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xc4e6bd]

Its a bug.

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Change docker data directory from /var/lib/docker to your

№ 10374 В разделе Sysadmin от October 25th, 2019,
В подшивках: Docker

Stop Docker daemon and move /var/lib/docker to new place, for example /mnt/HC_Volume_3397296/docker

Create file /etc/docker/daemon.json with contents:

{
    "data-root": "/mnt/HC_Volume_3397296/docker"
}

Now start daemon.

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Autocleaning docker registry

№ 10098 В разделе Sysadmin от June 25th, 2019,
В подшивках: Docker

To remove old images (in my case images can’t be older 14 days) I used https://github.com/andrey-pohilko/registry-cli and included registry tools to collect garbage.

Make sure you run your registry with REGISTRY_STORAGE_DELETE_ENABLED=true

docker run -d -p 127.0.0.1:5000:5000 -e "REGISTRY_STORAGE_DELETE_ENABLED=true" --restart always \
  --name docker-images-registry \
  -v /srv/registry/data:/var/lib/registry \
  -v /srv/registry/users:/auth/htpasswd registry:2

Now you can delete images

docker run --rm --link docker-images-registry anoxis/registry-cli \
  -r http://docker-images-registry:5000 --delete --keep-by-hours 336 \
  --keep-tags-like latest --digest-method=GET

Ok, use garbage collector

docker stop docker-images-registry

docker run --rm -v /srv/registry/data:/var/lib/registry \
  -v /srv/registry/users:/auth/htpasswd registry:2 \
  bin/registry garbage-collect /etc/docker/registry/config.yml

docker start docker-images-registry

Well done! Take a donut from a shelf.

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