I'm in the middle of creating a portfolio. I stumbled when accessing mysql, so I will write it including the meaning of the memorandum. I would be happy if it is delivered to beginners who have stumbled in the same place.
$docker-compose up
Can't connect to local MySQL server through socket 'var/run/mysqld/mysqld.sock' (2)
① Set user and password in docker-compose.yml ② Set the same user and password in database.yml
After entering the db container with $ docker exec -it <containerID> / bin / bash
After executing $ mysql -u root
, I entered mysql without any problem.
So there wasn't a problem with the server itself.
I think there is a problem with the user settings, so add the user and password to docker-compose.yml and database.yml
After that, I accessed it via http: // localhost: port /, but I got the following error.
Access denied for user 'root'@'172.18.0.5' (using password: YES)
When I did docker-compose up
before, it seemed that the cache remained in volume, so I deleted volume.
After doing docker-compose up
again, I put it in without any problem.
database.yml
# MySQL. Versions 5.5.8 and up are supported.
#
# Install the MySQL driver
# gem install mysql2
#
# Ensure the MySQL gem is defined in your Gemfile
# gem 'mysql2'
#
# And be sure to use new-style password hashing:
# https://dev.mysql.com/doc/refman/5.7/en/password-hashing.html
#
default: &default
adapter: mysql2
encoding: utf8mb4
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
username: root
password: password
host: db
development:
<<: *default
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *default
# As with config/credentials.yml, you never want to store sensitive information,
# like your database password, in your source code. If your source code is
# ever seen by anyone, they now have access to your database.
#
# Instead, provide the password as a unix environment variable when you boot
# the app. Read https://guides.rubyonrails.org/configuring.html#configuring-a-database
# for a full rundown on how to provide these environment variables in a
# production deployment.
#
# On Heroku and other platform providers, you may have a full connection URL
# available as an environment variable. For example:
#
# DATABASE_URL="mysql2://myuser:mypass@localhost/somedatabase"
#
# You can use this database configuration with:
#
# production:
# url: <%= ENV['DATABASE_URL'] %>
#
production:
<<: *default
docker-compose.yml
version: "3"
#Create db and backend containers
services:
db:
container_name: db
#Pull the image uploaded to Docker Hub
image: mysql:5.7.30
#Environment variable settings
environment:
TZ: Asia/Tokyo #Set TimeZone as well as Dockerfile
MYSQL_USER: root
MYSQL_ROOT_PASSWORD: password
#Specify the path of the configuration file to mount
volumes:
- mysql_data:/var/lib/mysql
#Set port
ports:
- 3316:3306
#Set IP address
networks:
app_net: #App described later_Set to use the following IPs in the net network space
ipv4_address: '172.20.0.2'
backend:
container_name: backend
#Execute ComposeFile and specify the path when it is built
build: ./backend/
image: backend
#Run gem to start the server, 0.0.0.Bind to 0 for full access
command: bundle exec rails server -b 0.0.0.0
#Always start the container
tty: true
#Launch input interface docker run-synonymous with it of it
stdin_open: true
#Backend is cache, temp, log,Mount on git
volumes:
- ./backend:/app:cached
- bundle_data:/usr/local/bundle:cached
- /app/vendor
- /app/tmp
- /app/log
- /app/.git
environment:
TZ: Asia/Tokyo
#Control startup order,After db
depends_on:
- db
ports:
- 5000:3000 #Port forwarding
networks:
app_net:
ipv4_address: '172.20.0.3'
#Set up your own network
networks:
#app_Define a network space called net
app_net:
driver: bridge #bridge Connect to network
ipam: #IP settings
driver: default
config:
- subnet: 172.20.0.0/24 #Define Subnet
#Define two volumes
volumes:
mysql_data:
bundle_data:
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