docker/docker

Docker - the open-source application container engine. This chat is intended for contributors new to the Docker project or new to open source. For user help, please goto #docker on freenode. For advanced contributors please goto #docker-dev on freenode.

matrixbot

@matrixbot

mxvin ...

SushantAA

@sushant.co19_gitlab

I have installed VirtualBox but not able to run
OS : ubuntu
Command : docker-machine create default
Error : Running pre-create checks...
Error with pre-create check: "VBoxManage not found. Make sure VirtualBox is installed and VBoxManage is in the path"

Jamey Hart

@jameyhart

@sushant.co19_gitlab This sounds like the issue raised here: docker/machine#4590. The suggested fix appears to be to change the case of VBoxManage. Hope that helps.

SushantAA

@sushant.co19_gitlab

I am trying to fix this from the last 3 days and not able to fix
Command------ docker run -ti -p 127.0.0.1:5432:5432 -e POSTGRES_HOST_AUTH_METHOD=trust -e LC_COLLATE=en_US.UTF8 -e LC_CTYPE=en_US.UTF8 --rm postgres:11 -c log_statement=all

Error------ docker: Error response from daemon: driver failed programming external connectivity on endpoint trusting_feistel (c76e7077bd6e012a2282670506334a0aef50695489dc20a1992e00e205f0954c): Error starting userland proxy: listen tcp 127.0.0.1:5432: bind: address already in use.

OS: Ubuntu

matrixbot

@matrixbot

Haley something is using the port already.

Davide Pugliese

@Deviad

Hello

Has anyone got this issue:
?

download.docker.com/linux/centos/something

Does it mean we need to install it from binaries now?

Davide Pugliese

@Deviad

Anyone?

docker/docker.github.io#11699

Azeddine

@taoufiqi

hello

Josh Reynolds

@jshreynolds

@sushant.co19_gitlab This means the port you are trying to bind to on your actual machine is either running a postgres locally or you already have a dockerized postgres running. you could try netstat -tanp to see what's listening on the port.

SushantAA

@sushant.co19_gitlab

thanks @jshreynolds . I solved it .

zzhssg

@zzhssg

corentin

@corenti13711539_twitter

I'm trying to run Docker inside Docker and mounting the /var/run/docker.sock socket. The socket gets the following permissions and ownership inside the container:

srwxr-xr-x 1 root root 0 Nov  8 17:20 /var/run/docker.sock

meaning it can't be accessed from inside the container with regular user privileges.
What's the best way to resolve this?

Tango Tan

@tango0o

sudo chown root:youxxx /var/run/docker.sock

youxxx -> docker

try to do it...

corentin

@corenti13711539_twitter

hmm. The socket is not there at container build time when I could still switch between root and regular user. The socket only available at container run time. And at that point the container is being run as a regular user.

I could configure sudo at container build time to allow user X to run the command you suggested.

Are there any other ways to tackle this?
Can I e.g. specify permissions for individual mounts somehow when starting the container?

vaibhavk1985

@vaibhavk1985

I am facing performance issues with django +gunicorn+nginx
I am getting 499 and 502 error
100 Users is hitting one url at same time
Anyone can help me

I am using aws ebs t2.xlarge instance

Roberto Di Lillo

@koop4

Hi Guys.
I have a dockerized node api, and I'd like to add a cache layer with redis.
I just completed the implementation within the node app but I'm realizing that this way the cache will be striclty linked with each container, is that right?

What's the common practce? should i add a cache layer in a different container and configure the api image to connect to that container to check if the cache contains anything?

matrixbot

@matrixbot

alephu5 Both ways are just as easy; if you use docker-compose you can use the name of the redis service as the URL. The advantage of using two separate containers is that you can put the containers on separate nodes if you want.

pavanelthepumisc

@pavanelthepumisc

Hi guys, buildx is not geterating images. It’s not giving errors also.
Command I used: docker buildx build --platform linux/amd64,linux/arm64 -t test-multi .
Output:

WARN[0000] invalid non-bool value for BUILDX_NO_DEFAULT_LOAD:  
WARN[0000] No output specified for docker-container driver. Build result will only remain in the build cache. To push result image into registry use --push or to load image into docker use --load 
[+] Building 6.1s (15/15) FINISHED                                                                                                                                                                                                                            
 => [internal] load .dockerignore                                                                                                                                                                                                                        0.0s
 => => transferring context: 2B                                                                                                                                                                                                                          0.0s
 => [internal] load build definition from Dockerfile                                                                                                                                                                                                     0.0s
 => => transferring dockerfile: 32B                                                                                                                                                                                                                      0.0s
 => [linux/arm64 internal] load metadata for docker.io/phenompeople/centos-sunjre:JP                                                                                                                                                                     6.0s
 => [linux/amd64 internal] load metadata for docker.io/phenompeople/centos-sunjre:JP                                                                                                                                                                     6.0s
 => [linux/amd64 1/5] FROM docker.io/phenompeople/centos-sunjre:JP@sha256:b6aa25e541a6102b77fca769738d00027fa3cfd6f2ff15507c4846d3845d7fad                                                                                                               0.0s
 => => resolve docker.io/phenompeople/centos-sunjre:JP@sha256:b6aa25e541a6102b77fca769738d00027fa3cfd6f2ff15507c4846d3845d7fad                                                                                                                           0.0s
 => [internal] load build context                                                                                                                                                                                                                        0.0s
 => => transferring context: 148B                                                                                                                                                                                                                        0.0s
 => [linux/arm64 1/5] FROM docker.io/phenompeople/centos-sunjre:JP@sha256:b6aa25e541a6102b77fca769738d00027fa3cfd6f2ff15507c4846d3845d7fad                                                                                                               0.0s
 => => resolve docker.io/phenompeople/centos-sunjre:JP@sha256:b6aa25e541a6102b77fca769738d00027fa3cfd6f2ff15507c4846d3845d7fad                                                                                                                           0.0s
 => CACHED [linux/arm64 2/5] COPY target/test-1.0-SNAPSHOT.jar /opt/deployment/test/test-1.0-SNAPSHOT.jar                                                                                                                                       0.0s
 => CACHED [linux/arm64 3/5] COPY *-server.sh /opt/deployment/

SauriBabu

@SauriBabu

HI, i have just started learning Kubernates. My personal desktop configuration is low and it gets hanged after starting docker for desktop.

in amazon ec2 all machines eligible for free-tier are only of 1 CPU.

any suggestion, how can I have K8 labs to do practice ?

PradeepRaj

@pradeeprajr93

Hi folks!!
What are the advantages of running local source code in docker container using volume (like this: -v $(pwd)/app )?

A.G.

@Divide-By-0

my take was -v $(pwd)/app leads to streaming of the folder in real time between machine (pwd) and docker (app folder)

StephenS

@S-Stephen

Hi the containers inside my docker-compose file are using their own network (or NOT network_mode = host). Is it still possible for them to connect to a server (eg database) that is on the hosts network (or external to the docker-compose network). If what does the config looklike, how do I get the containers in the compose to resolve the database hostname?

Stefan Lörwald

@stefanloerwald

Is there a way to add nodes to the kubernetes cluster in docker-for-win?

matrixbot

@matrixbot

Haley Docker for windows? that exists???

Haley But why would one want to run docker under windows. It is slow by default.

Stefan Lörwald

@stefanloerwald

That's really not the point. Ad there are many good reasons. And it's not exactly slow by default. But thanks for establishing that you won't be helpful

matrixbot

@matrixbot

Haley no problem. Still don't see any use-case to run docker in windows...

Stefan Lörwald

@stefanloerwald

And clearly you never did

matrixbot

@matrixbot

Haley Only windows Systems we have in this household are the Gaming Rigs. All other systems/servers/nas/mediacenter etc. run linux.

Stefan Lörwald

@stefanloerwald

I get it. You do things differently. That doesn't help me at all with modifying the k8s cluster in docker-for-win

matrixbot

@matrixbot

Haley if you have a cluster k8s/cluster, all you need to do is get the token to connect a node, and connect the node to your master.

Haley something like that: https://www.learnitguide.net/2020/03/add-new-worker-node-kubernetes-cluster.html

Stefan Lörwald

@stefanloerwald

Sadly that doesn't help, because the tool docker-for-win creates the k8s cluster for the user. So you can interact with it using kubectl, but you don't run the cluster yourself, so I don't begin to know where to execute kubeadm

matrixbot

@matrixbot

Haley You guys got a very simple php-based app, and a docker-compose example yml file for ti?

Haley * You guys got a very simple php-based app, and a docker-compose example yml file for it?

zoombinis

@zoombinis

sometimes when I run:

docker stop "$(docker ps --all --quiet)"
  docker rm "$(docker ps --all --quiet)"

I get:

Error: No such container: ....

How can docker ps identify a container that doesn't exist? Also, this terminates rm and causes me to manually rm in order to skip over the container that doesn't exist. Then, when I remove all other containers I am able to remove the one it said didn't exist!

Is there a way to "skip" failed attempts at stopping and removing so that all other containers still get removed?

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