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How does Github Actions work with docker containers?

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derk last edited by
Consider this GA workflow:
```
name: My GA Workflow
on: push
jobs:

myJobName:

runs-on: ubuntu-latest

container: cypress/included:10.6.0

steps:

- name: Ensure tools are available

shell: bash

run: |

apt-get update && 

apt-get install -y unzip zstd netcat
# and so on...
```
I would like to have a crystal clear understanding what happens there. Currently I reckon:
1. GA will run a ubuntu-latest virtual machine with docker engine pre-installed.
2. It will pull and run cypress/included:10.6.0.
3. All the steps will run inside the Cypress docker container, not on the Ubuntu machine.
Is that correct?
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B
baileigh last edited by

Yes your understanding is correct. The full documentation is here https://docs.github.com/en/actions/using-jobs/running-jobs-in-a-container
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Question: How is it right to build a Nginx configuration file to access my services/sites through the way, not through the port?All this is done exclusively by Nginx. Below is the configuration.And can this be done without a SSL certifier and without a home name? From the IP server address?I can.SSL doesn't need a certificate if you don't need HTTPS. And if you need it, you get free on Letsencrypt, here. https://certbot.eff.org/instructions , but then the domen will have to be bought.Dockercompose, do I have to do something special to build Nginx?♪ docker-compose.yaml We need to drop the port 80:80, then we'll open the IP address. It's important that this port be free. If you're busy, either release, or do a postcard on that web server that took it.ports: - 80:80 NginxOne section server, and two location is needed in Nginx to unload traffic on two applications. /app_1 and /app_2 with the proxy.But the apps will be on the way. /app_1/some-uriAnd if you want without that prefix, just /some-uri, then we need to rewrite and change a little proxy_pass, below it's done.upstream test_1 { server web_1:9000; } upstream test_2 { server web_2:8000; } server { listen 80 default_server; location /app_1/ { rewrite ^/app_1/(.*) /$1 break; proxy_set_header Host $host; proxy_pass http://test_1$uri; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_redirect off; } location /app_2/ { rewrite ^/app_2/(.*) /$1 break; proxy_set_header Host $host; proxy_pass http://test_2$uri; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_redirect off; } }
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One could pass environment variables when running docker, e.g.: Additionally, the operator can set any environment variable in the container by using one or more -e flags, even overriding those mentioned above, or already defined by the developer with a Dockerfile ENV: $ docker run -e "deep=purple" --rm ubuntu /bin/bash -c export
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According to the docs tmpfs is linux only. RAM disk If you want "RAM only storage", you can literally use a RAM disk. ie: diskutil erasevolume HFS+ 'DockerDisk' `hdiutil attach -nomount ram://2097152 ` Then you can point volumes at /Volumes/DockerDisk. Drop and recreate at will. Docker will still store its VM and images on disk. See: Docker > Preferences > Disk.
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If the first dns-server answers NXDOMAIN, the other dns-server is not questioned because nxdomain is not a mistake. Probably at a dn server on the Lokalhost (127.0.0.1), there's no intention of moving requests (option forwarders in bind)
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How can secrets be distributed in a docker swarm?
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Once the secret reaches a manager node, it gets saved to the internal Raft store, which uses NACL’s Salsa20Poly1305 with a 256-bit key to ensure no data is ever written to disk unencrypted. Writing to the internal store gives secrets the same high availability guarantees that the the rest of the swarm management data gets. https://blog.docker.com/2017/02/docker-secrets-management/
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I'd start by saying you're making things a bit tough for yourself by doing this with curl rather than the docker CLI (it's a good thing to learn though) So I think your problem here is that you've cat'd /etc/passwd inside the container, rather than /host/etc/passwd remember you're mounting the host filesystem with /host as a base, so you need to prepend that path to any files you're looking to get access to.
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You want the https://docs.ansible.com/ansible/latest/collections/ansible/builtin/wait_for_module.html#ansible-collections-ansible-builtin-wait-for-module or https://docs.ansible.com/ansible/latest/collections/ansible/builtin/wait_for_connection_module.html#ansible-collections-ansible-builtin-wait-for-connection-module modules. If your playbook consists of a single play, which starts the container, then loads data into it, but still targetting the docker host, then you should use wait_for to determine when the container is up and running -- typically by polling some health check. If however your playbook consists of two plays, i.e. Target Docker host and start container, then add the container to the inventory Target the container, using the docker transport and load the data then you should use the wait_for_connection module. In either case it will depend somewhat on what the container does and how you know that it is ready for action. If it exposes a file, port or url then you should be able to do what you need.
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In the file. sshd.service Try writing. RestartSec Section [Service]Restart=always File's in. /etc/systemd/system/sshd.service
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With an VM you have a complete machine with all the overhead like filesystem, bash.... With Docker, you use all of that from the "host". Only what is really different is sort of duplicated. makes sense? here is an picture: docker vs VM To make it a bit clearer: In the docker container are only the extra bins/libs needed for that particular application. Everything else is provided by the host-os. That makes the up and down of the app much faster and the overall systemload is much less, since you only have one os running. With an VM, on the other hand, you have a whole os running. Most of that is not needed.
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Triggering Jenkins using GitHub webhook should be a straight forward process. This article would help you.
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horribly insecure: root $ root $ docker login Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one. Username: nicksaunders Password: WARNING! Your password will be stored unencrypted in /root/snap/docker/471/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded root $ root $ docker images REPOSITORY TAG IMAGE ID CREATED SIZE helloworld_web latest 3118807ab0e0 13 minutes ago 196MB frappe/erpnext-nginx latest e417869e11ba 39 hours ago 414MB frappe/erpnext-worker latest 96559438dfec 40 hours ago 1.22GB frappe/frappe-nginx latest 3d006c375c6e 40 hours ago 410MB frappe/frappe-worker latest 961988528953 40 hours ago 1GB frappe/frappe-socketio latest bca49f1b4a04 40 hours ago 180MB frappe/bench latest 8c1bc9d3a572 40 hours ago 1.4GB frappe/erpnext-docs-nginx latest 7d117e2bd798 42 hours ago 428MB frappe/erpnext-docs-worker latest a1c0b0511e92 42 hours ago 2.88GB frappe/erpnext-worker <none> 09be9dde8f8f 2 days ago 1.21GB frappe/bench <none> c775a49dee59 2 days ago 1.4GB redis alpine bd71e6db4a54 13 days ago 32.2MB python 3.7-alpine 295b051ee125 2 weeks ago 41.7MB basex/basexhttp latest 3339bf6bc898 3 weeks ago 226MB twilio/twilio-java latest 611ab7ece1cf 5 weeks ago 993MB mysql latest 0d64f46acfd1 7 weeks ago 544MB jetty latest 5f997007f18d 7 weeks ago 522MB jitsi/web latest 1fad75476320 2 months ago 483MB mysql/mysql-server latest 8a3a24ad33be 2 months ago 366MB hello-world latest bf756fb1ae65 8 months ago 13.3kB lukptr/erpnext7 latest 130f3d9f222f 14 months ago 3.59GB root $ root $ docker tag helloworld_web nicksaunders/helloworld:firsttry root $ root $ docker push nicksaunders/helloworld The push refers to repository [docker.io/nicksaunders/helloworld] fca41575e369: Pushed 40f0977ea685: Pushing [==================================================>] 12.08MB f8b013a4d861: Pushed 1d6d0bace1b8: Pushing [====> ] 13.03MB/143MB aabee2d268fc: Pushed 22ee430ae506: Waiting 60faa6c61cf9: Waiting cfd52085ef94: Waiting 408e53c5e3b2: Waiting 50644c29ef5a: Waiting but seems to work.
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How do you re the docker container?
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Docker images watch the old image if it's left without the shadow and name. Docker ps-a, look what's left of your previous containers. docker start parameters and name of the container from the previous listWe'll save everything that's happened. In the future, if you need something permanent to store that typical approach, two, mount a folder into a container. To create a so-called docker volume You need to see the docker a little deeper. Hz helps dig up somewhere.
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Seems to be just an issue with a Python package. Traceback (most recent call last): File "a.py", line 1, in <module> import cv2 ImportError: No module named 'cv2' Is a common Python error, basically it can't find the package cv2. You could try and install OpenCV through pip instead of installing through apt get. Something could be up with dependancies that you may have missed. RUN pip3 install opencv-python
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While this is possible it is not a best practice. Whenever possible, containers should contain a single process. The reasoning for this is: It fosters a modular design where you can more easily plug and play components. What if you decide not to use nginx and use asp.net core in the future? If everything is tightly coupled in one container then the entire container will need to be reworked any time one of these components changes. Look into microservices for more information on the benefits a modular design. It is easier to parse container logs as each container will have its own distinct output. If a process crashes and everything is in one container, the entire container will crash. If you have them broken out across multiple containers, recovery is simplified. While this may not be applicable for running standalone containers, it is very useful if the containers are running in a Kubernetes Pod as the Pod can restart.
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I don't think volumes can be specified with relative paths. Put an absolute path instead of ./elastic-stack-ca.p12 and you should be fine.

How does Github Actions work with docker containers?

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