![]() ![]() What will happen if some packets are dropped, or the latency goes up? Maybe a service goes offline?Ĭhaos testing is all about getting prepared for this. It's always better to prepare for such scenarios and test how the system behaves in case of different issues. Chaos testingĪs you know, when it comes to an outage, the question is not if it will happen, but when. Both can also be developed in separate repositories.Īs an extension to the above, you can take a look at container aliases to make routing easier, or internal to even more isolate services. ![]() Service1 and 2 web containers can reach each other, but their databases are separated. ![]() But if a network with the provided name exists, it will reuse the existing network for its services. This means, docker-compose won't try to create it and will fail if it is not available. Networks : service2 : web : external : true #needs to be created by other file name : shared -webĪs you can see in lines 20-21, in this case, we configure an external network. Version : '3.6' services : service2-db : image : mariadb : 10.3 environment : MYSQL_ROOT_PASSWORD : secret This would mean we have two docker-compose.yaml files: One for service1, and a second one for service2. Let's assume we decided to split the previously used project into two separate repositories. How can we connect such services? Let's take a look. So a developer can launch each of the services separately. Quite often, such projects as the above one are split between git repositories, or at least between docker-compose.yaml files. Connecting containers between multiple docker-compose files I prefer to create separate ones, so the network name clearly states what it is for. the default network is still there, and you can use it. Keep in mind that a container has different IP address in each of the networks it is in. # getent hosts service1-db 172.20.0.3 service1-db service1-dbĪs you can see, we can quite easily achieve a separation between containers by introducing networks and connecting together only selected containers. # getent hosts service2-web 172.22.0.2 service2-web service2-web ![]()
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