Apk add pdftk unsatisfiable constraints

Question

Can somebody explain to me why I get a

unsatisfiable constraints:
  pdftk (missing):
    required by: world[pdftk]

error when running

apk update
apk add pdftk

in my alpine docker-image, although it seems to be included in alpine?

Best regards

Hartmann

At the time of writing this, pdftk is available on Alpine 3.8, but not Alpine 3.9 (which is the latest version). I simply reverted to Alpine 3.8 for now to get the desired effect. – Krauss

Updated answer here: #66554437 – Surprisal

Answer 1

It seems there is no local cache of alpine repositories inside your docker image.

So, in order to fix this you can do the following:

1. Use --no-cache flag when you do apk add to not use any local cache path:

$ docker run -ti alpine:3.7
/ # apk add --no-cache pdftk
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
(1/5) Installing libgcc (6.4.0-r5)
(2/5) Installing gmp (6.1.2-r1)
(3/5) Installing libstdc++ (6.4.0-r5)
(4/5) Installing libgcj (6.4.0-r5)
(5/5) Installing pdftk (2.02-r1)
Executing busybox-1.27.2-r7.trigger
OK: 76 MiB in 16 packages

2. Update local cache first (apk update) and then install necessary packages (apk add <package>):

$ docker run -ti alpine:3.7
/ # apk update
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
v3.7.0-159-g08fa87dac2 [http://dl-cdn.alpinelinux.org/alpine/v3.7/main]
v3.7.0-160-g82f356f8c4 [http://dl-cdn.alpinelinux.org/alpine/v3.7/community]
OK: 9050 distinct packages available
/ # apk add pdftk
(1/5) Installing libgcc (6.4.0-r5)
(2/5) Installing gmp (6.1.2-r1)
(3/5) Installing libstdc++ (6.4.0-r5)
(4/5) Installing libgcj (6.4.0-r5)
(5/5) Installing pdftk (2.02-r1)
Executing busybox-1.27.2-r7.trigger
OK: 76 MiB in 16 packages

P.S. Also please remember that pdftk package was added to alpine repositories starting from version 3.5. It could be the case you are using alpine:3.4 as a base docker image.

P.P.S. pdftk package is not present from alpine repositories on 3.9.

Selenography

sorry, of course i do a apk update before i try to apk add <package> – Hartmann

What can we do for alpine:3.9? Any suggestions? – Ruthenic