This come from a design choice of YAML language about booleans
Every unquoted value matching this "regex":
Will be converted to True or False.
This start causing a problem when your code will test an environment value to be yes or no for example taking this script (...
The Docker Compose file reference states, that environment variables are defined as VARIABLE=value array elements. For your case, the docker-compose.yml file would need to be changed to this:
Yes, it's possible. You can use --parallel option since docker-composer 1.23.2 version.
Version 1.23.2 also correct 1.23.0 bug:
Reverted a 1.23.0 change that appended random strings to container
names created by docker-compose up, causing addressability issues.
Note: Containers created by docker-compose run will continue to use
randomly generated ...
There are a number of use cases for port mapping, but for DevOps at scale the primary reason is generally to enable mapping well-known service ports to available ports on the host. This matters when you're running large numbers of containers that use the same port by default, and you don't want to manually assign or track alternative port numbers.
Research indicated that the anonymous volumes were created by influxdb and grafana/grafana.
Anonymous volumes are not given an explicit name when they are first
mounted into a container, so Docker gives them a random name that is
guaranteed to be unique within a given Docker host. Besides the name,
named and anonymous volumes behave in the same ...
The Dockerfile specifies how a container image is built. The Dockerfile’s RUN command is trying to ping the db container, which is not yet running during the build phase.
Once the container images have been created, compose will start the containers and they will be able to address each other via their service names (db and web).
To accomplish what you want,...
We are less likely to see support of native docker-compose integration because pipelines API is a custom implementation of similar functionality, and also because possible security issues, but looks like more features are currently in development to implement more docker-compose-like features in this open issue.
UPDATE: added support for multi-container ...
db_data:/var/lib/mysql simply means that the db_data volume that was previously created will be made available in the container at /var/lib/mysql.
In you example it's created at the very end of the compose file.
From the Docker documentation: "The docker volume db_data persists any updates made by Wordpress to the database."
Compose volumes works the same ...
There is a protocol for this: RSS, Rich Site Summary. Technically, there are 3 protocols RSS, RSS2 and Atom, but most readers support all of them, and many servers mix RSS and RSS2 features.
First, choose your RSS reader, from:
browser add-ons like Feedbro,
centralized aggregators like Feedly and FeedReader,
stand-alone applications like RSSOwl
What you are specifically after (building from a bare repository on a local filesystem) isn't functionality offered by Docker, and by extension, docker-compose. Docker supports building from a few different URLs, but not bare repositories on local filesystems. You can try a few workarounds:
Build straight from Github: docker build https://github.com/docker/...
If you use CentOS 7 (as I have ). You may have SELinux turned on by default.check https://www.rootusers.com/how-to-enable-or-disable-selinux-in-centos-rhel-7/
or mount like this:
I just figure it out. The problem is not with the service or the swarm, it's with the network.
When I use driver: overlay the default subnet is 10.0.0.0/24 which result in 254 address. So I change the mask in the subnet, to 22, which result in 1022 address, I added:
And now the network section in the docker-compose ...
First, use alpine images if possible.
Second, use ENV variables for prepare database configuration. More info.
Third, use /docker-entrypoint-initdb.d directory for extend image. More info.
Example stack with devlopment environment.
There are a few features of docker-compose that are not implemented in docker stack deploy and vice versa.
With docker-compose, you can run privileged containers and change capabilities which is not supported with swarm services yet. You can also run a container that is designed to exit, e.g. a batch job, more intuitively in docker-compose than in swarm ...
I found the reason of the problem.
In Docker "anything after the VOLUME instruction in a Dockerfile will not be able to make changes to that volume".
I define volume "./app:/var/www/app", and after that manipulate with it, so it's not work.
I've tried your case, and it works fine on my side:
command: sleep 9999
and here is what I get in the container
Docker does not allow to connect a container to the host network and any other Docker bridge network at the same time. I will try to illustrate the reason with an example:
Let us think of a container C1. Hypothetically, C1 would be connected to the host network (--net=host) and a Docker bridge network Br1 (--net=Br1).
A second container, let us say C2, is ...
According to this documentation it does not seem to be possible to override complete sections in docker-compose by using different docker-compose files.
If both files are present on the same directory level, Compose
combines the two files into a single configuration.
The configuration in the docker-compose.override.yml file is applied
over and in ...
docker-compose is just a glorified wrapper around docker which gives you a nice textual representation of all the options you would regularly give to docker build or docker run. Plus, of course, it bundles several docker images/containers together. That said, it has no provisions to run anything else than you would get by calling docker.
I don't see how you ...
Docker Prepends the current folder name with all the components name created using docker compose file.
Eg : If the current folder name containing the docker-compose.yml file is test, all the volumes,network and container names will get test appended to it. In order to solve the problem people earlier proposed the idea of using -p flag with docker-compose ...
docker-compose.override.yml, docker-compose.prod.yml and extend
An outline answer would be to have a docker-compose.yml file for your common base configuration, a docker-compose.prod.yml for production-specific sets of containers and for other specific environments, docker-compose.override.yml. It is possible to use the docker-compose extend keyword/command/...
Internal Docker networks mean there is no gateway configured to reach the outside internet, you can only reach other containers from that network. In your scenario, none of your networks should have this definition.
Without setting the internal network flag, containers can reach out of the docker host, potentially to the internet if the host has that access....