The problem Docker PHP-Redis and healthcheck - php

Question

I have two services. Redis and PHP. How to make php wait for the launch of redis and write about it.I tried using healthcheck-s but apparently I am not setting it up correctly.
docker-compose.yml
version: '2'
services:
php:
build:
context: docker/web
dockerfile: Dockerfile-php-7.0
container_name: php
ports:
- "8280:80"
links:
- redis:redis
redis:
build: docker/cache
container_name: redis
Dockerfile-php-7.0
FROM php:7.0
RUN pecl install redis \
&& docker-php-ext-enable redis
COPY . /usr/src/myapp
WORKDIR /usr/src/myapp
CMD [ "php", "./index.php"]
EXPOSE 80
index.php
<?php
echo 'Starting';
$redis = new Redis();
$redis->connect(getenv('host'), getenv('6379'));
var_dump($redis->incr('foo'));
?>
Dockerfile
FROM redis:3.2-alpine
COPY conf/redis.conf /usr/local/etc/redis/redis.conf
CMD [ "redis-server", "/usr/local/etc/redis/redis.conf" ]
EXPOSE 6379
Don't be afraid to scold me. I am just starting to learn docker.
I would be very grateful for any help !!!

Answer 1

Here is the docker-compose.yml file that you can use:
version: '2.1'
services:
php:
build:
context: docker/web
dockerfile: Dockerfile-php-7.0
container_name: php
ports:
- "8280:80"
depends_on:
redis:
condition: service_healthy
redis:
build: docker/cache
container_name: redis
healthcheck:
test: ["CMD", "redis-cli", "ping"]
interval: 10s
I also change the PHP script (index.php) as follows:
<?php
echo 'Starting';
$redis = new Redis();
$redis->connect('redis', '6379');
var_dump($redis->incr('foo'));
Now the whole stack works in my machine. I can connect redis container from php.
The php container log shows the following
docker logs -f php
Startingint(1)