micahyoung

Summary

Docker (and other tools) appear to not properly convert directory symlinks on either docker build+COPY . . or docker cp to a running container

Tests

git clone, by default, for file symlinks it copies the data to both source and target files and for directory symlinks it creates empty files instead of a directory

git clone -c core.symlinks=true recreates file and directory symlinks correctly but is not the default

tar.exe creates tar but when extracted, the symlink is an empty file (same for ustar, pax formats)

micahyoung

ARG os_tag
FROM mcr.microsoft.com/windows/servercore:${os_tag}

...

micahyoung

Issue for mutate.Rebase with foreign layers

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FROM golang:1.13-nanoserver-1809

COPY main.go c:/main.go

RUN go build -o c:\\webserver.exe c:\\main.go

CMD ["c:\\webserver.exe"]

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hexdump -n 5 -e '4/4 "%x" 1 "\n"' /dev/random

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env | grep 'BOSH.*=' | cut -d'=' -f1 | while read key; do eval "val=\"\$$key\""; echo "export $key=\"$val\""; done

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Get current OS image and buid number

systeminfo
#> OS Name:     Microsoft Windows Server 2019 Datacenter
#> OS Version:  10.0.17763 N/A Build 17763

Make patched source from older iso

1. Get an ISO with same version but lower patch than current image

micahyoung

#!/bin/bash
set -o errexit -o pipefail -o nounset

bosh repack-stemcell --empty-image \
  --cloud-properties="$(bosh interpolate --path /Tables/0/Rows/0 <(bosh inspect-local-stemcell --json $1))" \
  $1 \
  $(dirname $1)/light-$(basename $1)

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On Mac workstation

1. Download and Install VMware Fusion

   • Use the preview of Nautilus if possible: http://bit.ly/getnautilus
     • Or, if you have a Fusion license license: https://www.vmware.com/products/fusion/fusion-evaluation.html
       • Choose Fusion Pro during install
   • Accept/enable all "Accessiblity" helpers (
     • if missed, Preferences -> Security -> Click "Allow" for VMWare extension

2. Create a new Fusion Network Interface

• Open Fusion

micahyoung

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