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This is helpful when connecting a database container with an app container.
Warning: The --link flag is a legacy feature of Docker. It may eventually be removed. Unless you absolutely need to continue using it, we recommend that you use user-defined networks to facilitate communication between two containers instead of using --link. One feature that user-defined networks do not support that you can do with --link is sharing environmental variables between containers. However, you can use other mechanisms such as volumes to share environment variables between containers in a more controlled way.
Linking Containers
The --link flag takes the form:
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| Code Block | ||
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> docker exec -it confluence bash bash-4.4# cat /etc/hosts 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 10.0.3.4 mysql 4157a451ee8c 10.0.3.2 bac14530534d |
References
| Reference | URL |
|---|---|
| Docker Links | https://docs.docker.com/network/links/ |