docker

• Install docker on AWS via CloudFormation

Create a resource group

        
sql
        

            
        
     
az group create --name myGroup --location eastus

Create the container

        
css
        

            
        
     
az container create --resource-group myGroup --name myName --image tensorflow/tensorflow --dns-name-label myDnsName --ports 8888

Show status

        
css
        

            
        
     
az container show --resource-group myGroup --name myName --query "{FQDN:ipAddress.fqdn,ProvisioningState:provisioningState}" --out table

        
css
        

            
        
     
az login
az acr login --name repoName

For example, adding the container some-postgis to the same network as the container postgres_adminer_1.

Find the NetworkID of the network:

        
perl
        

            
        
     
docker inspect postgres_adminer_1 | grep NetworkID

Add the container to the network:

        
sql
        

            
        
     
docker network connect f51952f2eb6ea17fbf1917b3609b99f2a70cce8b4e1e1c35177bcb4388ff1124 some-postgis

Find large directories

        
bash
        

            
        
     
du -ah / | sort -h -r | head -n 20

Find containers using a given volume

        
lua
        

            
        
     
docker ps -a --filter volume=<volume>

Remove container and its associated volume

        
bash
        

            
        
     
docker rm -v container

See total volume, image, container space

        
bash
        

            
        
     
docker system df

See space used per volume

        
bash
        

            
        
     
docker system df -v

Remove dangling volumes from disk

        
undefined
        

            
        
     
docker volume prune

• docker system prune
• docker container prune
• docker volume prune

• Open protocols and ports between the hosts

For the image verdaccio/verdaccio:

        
powershell
        

            
        
     
docker rm $(docker ps -q -a --filter ancestor=verdaccio/verdaccio)

Set the command to tail -f /dev/null

Example:

        
bash
        

            
        
     
docker run -d node tail -f /dev/null

Set the TZ environment variable inside linux containers to set the timezone, for example docker run -e TZ={timezone} or, for example inside your docker-compose;

        
makefile
        

            
        
     
environment:
    TZ: "Australia/Sydney"

        
perl
        

            
        
     
# set to always restart
docker update --restart=always <container>

# rename
docker rename <container> <new name>

Accessing Event Viewer in a docker container Using the Windows EventViewer GUI to view Eventlogs in Containers

sudo gpasswd -a $USER docker

Don’t install go, instead build it inside the go container;

        
ruby
        

            
        
     
docker run --rm -v %CD%:/go/src/github.com/prometheus/prometheus -w /go/src/github.com/prometheus/prometheus golang:1.10 make build

Run it inside that docker container too!

        
ruby
        

            
        
     
docker run --rm -v %CD%:/go/src/github.com/prometheus/prometheus -w /go/src/github.com/prometheus/prometheus -p 9090:9090 golang:1.10 ./prometheus

Note: I executed the following to have it use a test config;

        
bash
        

            
        
     
copy ./config/testdata/conf.good.yml ./prometheus.yml

• WSL 2 consumes massive amounts of RAM and doesn’t return it

yolo

Force linux to drop the page cache

        
bash
        

            
        
     
echo 1 | sudo tee /proc/sys/vm/drop_caches

• GitHub

limit memory assigned to WSL2 VM

Create a %UserProfile%\.wslconfig file

        
ini
        

            
        
     
[wsl2]
memory=6GB
swap=0
localhostForwarding=true

• GithHub