How to mount a folder to a container in kubernetes?

Question

Docker

Good afternoon. Please tell me, I created a deployment for my container.

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    app: app
  name: app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: app
  template:
    metadata:
      labels:
        app: app
    spec:
      containers:
      - image: app
        imagePullPolicy: Never
        name: app
        ports:
        - containerPort: 11080
        volumeMounts:
        - mountPath: /var/www
          name: env-app
        securityContext:
          privileged: true
      volumes:
       - name: env-app
         hostPath:
           path: /.
           type: Directory

It should mount files with the project into the folder. And he mounts the root of the alpin image in the folder. What can be wrong? This is the image dockerfile for the app container

FROM php:7.1-fpm-alpine

ENV COMPOSER_HOME="/usr/local/composer"

ENV PHP_XDEBUG_DEFAULT_ENABLE ${PHP_XDEBUG_DEFAULT_ENABLE:-1}
ENV PHP_XDEBUG_REMOTE_ENABLE ${PHP_XDEBUG_REMOTE_ENABLE:-1}
ENV PHP_XDEBUG_REMOTE_HOST ${PHP_XDEBUG_REMOTE_HOST:-"127.0.0.1"}
ENV PHP_XDEBUG_REMOTE_PORT ${PHP_XDEBUG_REMOTE_PORT:-9000}
ENV PHP_XDEBUG_REMOTE_AUTO_START ${PHP_XDEBUG_REMOTE_AUTO_START:-1}
ENV PHP_XDEBUG_REMOTE_CONNECT_BACK ${PHP_XDEBUG_REMOTE_CONNECT_BACK:-1}
ENV PHP_XDEBUG_IDEKEY ${PHP_XDEBUG_IDEKEY:-docker}
ENV PHP_XDEBUG_PROFILER_ENABLE ${PHP_XDEBUG_PROFILER_ENABLE:-0}
ENV PHP_XDEBUG_PROFILER_OUTPUT_DIR ${PHP_XDEBUG_PROFILER_OUTPUT_DIR:-"/tmp"}

RUN \
    addgroup -g 1000 -S user && \
    adduser -u 1000 -D -S -G user user && \
    \
    apk update && \
    apk upgrade && \
    \
    apk add --no-cache \
        $PHPIZE_DEPS \
        supervisor \
        nodejs \
        nodejs-npm \
        yarn \
        dcron \
        composer \
        tini \
        libintl \
        icu \
        icu-dev \
        libxml2-dev \
        postgresql-dev \
        freetype-dev \
        libjpeg-turbo-dev \
        libpng-dev \
        gmp \
        gmp-dev \
        libmemcached-dev \
        imagemagick-dev \
        libssh2 \
        libssh2-dev \
        libxslt-dev && \
    \
    docker-php-ext-configure gd \
        --with-freetype-dir=/usr/include/ \
        --with-jpeg-dir=/usr/include/ && \
    \
    pecl install -o -f redis \
    &&  docker-php-ext-enable redis && \
    \
    pecl install memcached \
    && docker-php-ext-enable memcached && \
    \
    docker-php-ext-install -j"$(getconf _NPROCESSORS_ONLN)" \
        intl \
        bcmath \
        xsl \
        zip \
        soap \
        mysqli \
        pdo \
        pdo_mysql \
        pdo_pgsql \
        gmp \
        iconv \
        gd && \
    \
    pecl install \
        xdebug && \
    docker-php-ext-enable xdebug && \
    \
    composer global require hirak/prestissimo && \
    \
    chmod a+rw -R ${COMPOSER_HOME} && \
    \
    apk del \
        $PHPIZE_DEPS

WORKDIR /var/www

Answer 1

This is most likely the case: path: /.If you want to refer to the current directory in Linux, then it will be. ./
Keep in mind that in h8s host this is not the machine from which you deploy, but the one on which the pod with containers will be launched. Accordingly, you should first create the desired directory on the host and place the necessary files there, and then mount it using the absolute path.