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QUESTION
I am having this weird issue with elastic beanstalk. I am using docker compose to run multiple docker containers on same elastic beanstalk instance.
if I run 4 docker containers everything works fine. but if i make it 5, deploy fails with error Instance deployment failed to download the Docker image. The deployment failed.
and if I check eb-engine.log. it retries to docker pull command and fails with error.
this is really weird error. bcs all docker images are valid and correctly tagged. it just the number of services that I am adding in docker compose file. if number is greater than 4, deploy fails
my question is, is there any limit of docker services that can be run using docker compose ? or is there any timeout in elastic beanstalk to pull images?
...ANSWER
Answered 2021-Jun-16 at 03:01Based on the comments.
The issue was that t2.micro instance was used. The instance has only 1 vCPu and 1GB of ram. This was not enough to run 5 docker containers. Changing instance type to t2.large with 8GB ram and 2 vCPUs solved the problem.
docker-compose allows to specify cpu and memory limits. Maybe you can set them up to keep your containers resource requirements in check.
QUESTION
I am trying to configure github webhooks with my jenkins server but I keep getting "failed to connect". Note that I am using a public ip and not a private or localhost address, At first, icmp protocol was blocked on my firewall but even after allowing it, it still doesn't work.
However, when I proxy my server (using smee client) and use the proxied url in the webhook instead, it works fine, so I thought the problem was jenkins url (in system configuration of jenkins) so I changed that to the public ip but it doesn't have any effect, now I'm clueless.
It might be relevant to mention that jenkins is running on a docker container,
...ANSWER
Answered 2021-Jun-15 at 23:51Apparently the webhook must pass through a web server and not to jenkins directly, So I configured nginx as a reverse proxy to jenkins server and it worked fine.
QUESTION
I installed oracle db version 19c in my docker environment with the following command:
...ANSWER
Answered 2021-Jun-15 at 16:53SQL*Loader is in the image - but the docker container is separate from your host OS, so ubuntu doesn't know any of the files or commands inside it exist. Any commands inside the container should be run as docker commands. If you try this, it should connect to your running container and print the help page:
QUESTION
I am trying to proxy requests from my containerized React application to my containerized Flask application.
I was starting the application using npm start (in Docker), and I did not have any issues proxying requests. However, I learned that npm start is not a good way to proceed in production.
Following the advice here: Run a React App in a Docker Container , I am able to start my containerized production React, but now the requests are not proxied.
Within the React app, all requests are handled with axios and are formatted: "/api/v1/endpoint". It seems that others have had issues between "http://localhost:80/api/v1/endpoint" and "/api/v1/endpoint". I do not believe this is my issue, unless it arises only in the production environment.
I have also tried changing my "proxy" address in package.json to the location of the dockerized flask container, and later to the name of the docker container, but I have not been able to make either solution work.
If anyone can provide guidance on launching a containerized, production React app that proxies requests to a backend container, please advise.
I am open to using a different server, if the procedures in "Run a React App in a Docker Container" need to be updated.
I have looked these solutions:
Proxy React requests to Flask app using Docker
...ANSWER
Answered 2021-Jun-15 at 16:20After digging around and trying a bunch of solutions, here is what worked:
1.) I changed my docker file to run an nginx server:
QUESTION
I'm trying to docerize my NodeJS API together with a MySQL image. Before the initial run, I want to run Sequelize migrations and seeds to have the tables up and ready to be served.
Here's my docker-compose.yaml:
ANSWER
Answered 2021-Jun-15 at 15:38I solved my issue by using Docker Compose Wait. Essentially, it adds a wait loop that samples the DB container, and only when it's up, runs migrations and seeds the DB.
My next problem was: those seeds ran every time the container was run - I solved that by instead running a script that runs the seeds, and touchs a semaphore file. If the file exists already, it skips the seeds.
QUESTION
I'm using create-react-app and have configured my project for eslint. Below is my .eslintrc file.
...ANSWER
Answered 2021-Jun-15 at 12:54You can do it by adding DISABLE_ESLINT_PLUGIN=true to the "build" in the "scripts" part in your package.json:
QUESTION
I am trying to convert the io.ReadCloser (interface) that I am getting after running the Docker image via Go docker-sdk to []byte for further use.
When I read from the io.ReadCloser using stdcopy.StdCopy to stdout, it prints the data perfectly.
The code stdcopy.StdCopy(os.Stderr, os.Stdout, out) prints:
ANSWER
Answered 2021-Jun-15 at 11:30Those are stray bytes like *, %, etc. prefixed with some of the lines.
The stray bytes appear to be a custom stream multiplexing protocol, allowing STDOUT and STDERR to be sent down the same connection.
Using stdcopy.StdCopy() interprets these custom headers and those stray characters are avoided by removing the protocol header for each piece of data.
Refer: https://github.com/moby/moby/blob/master/pkg/stdcopy/stdcopy.go#L42
QUESTION
Why kubectl cluster-info is running on control plane and not master node And on the control plane it is running on a specific IP Address https://192.168.49.2:8443 and not not localhost or 127.0.0.1 Running the following command in terminal:
- minikube start --driver=docker
😄 minikube v1.20.0 on Ubuntu 16.04 ✨ Using the docker driver based on user configuration 🎉 minikube 1.21.0 is available! Download it: https://github.com/kubernetes/minikube/releases/tag/v1.21.0 💡 To disable this notice, run: 'minikube config set WantUpdateNotification false'
👍 Starting control plane node minikube in cluster minikube 🚜 Pulling base image ... > gcr.io/k8s-minikube/kicbase...: 358.10 MiB / 358.10 MiB 100.00% 797.51 K ❗ minikube was unable to download gcr.io/k8s-minikube/kicbase:v0.0.22, but successfully downloaded kicbase/stable:v0.0.22 as a fallback image 🔥 Creating docker container (CPUs=2, Memory=2200MB) ... 🐳 Preparing Kubernetes v1.20.2 on Docker 20.10.6 ... ▪ Generating certificates and keys ... ▪ Booting up control plane ... ▪ Configuring RBAC rules ... 🔎 Verifying Kubernetes components... ▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5 🌟 Enabled addons: storage-provisioner, default-storageclass 🏄 Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default
- kubectl cluster-info
Kubernetes control plane is running at https://192.168.49.2:8443 KubeDNS is running at https://192.168.49.2:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
...To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
ANSWER
Answered 2021-Jun-15 at 12:59The Kubernetes project is making an effort to move away from wording that can be considered offensive, with one concrete recommendation being renaming master to control-plane. In other words control-plane and master mean essentially the same thing, and the goal is to switch the terminology to use control-plane exclusively going forward. (More info in this answer)
The kubectl command is a command line interface that executes on a client (i.e your computer) and interacts with the cluster through the control-plane.
The IP address you are seing through cluster-info is the IP address through which you reach the control-plane
QUESTION
I created an image and pushed to dockerHub, from an angular project. I can see that if I will go to localhost:80 it will open the portal. This are the steps:
...ANSWER
Answered 2021-Jun-14 at 15:35Your repository is private and requires login to pull image.
You need to create a registry credentials secret for kubernetes, as it do not uses docker credentials.
See https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
1. Create a secret named regcred:
QUESTION
I just reinstalled Fabric Samples v2.2.0 from Hyperledger Fabric repository according to the documentation.
But when I try to run asset-transfer-basic application located in fabric-samples/asset-transfer-basic/application-javascript directory by running node app.js the wallet is created and an admin and user is registered. But then it tries to invoke the function as given in app.js and shows this error
ANSWER
Answered 2021-Jan-29 at 04:04In my opinion, the CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE setting seems to be wrong.
you can check docker-compose.yaml or core.yaml
- I will explain fabric-samples/test-network as targeting according to your current situation.
- You can check in
CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODEin docker-compose.yaml - Perhaps in your case(fabric-samples/test-network), the value of
${COMPOSE_PROJECT_NAME}was not set properly, so it was set to_test. - Make sure the value is set correctly and change it to your network name.
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