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blablacar / dgr

Container build and runtime tool
Apache License 2.0
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Fix examples ACI build #232

Closed jbfavre closed 7 years ago

jbfavre commented 7 years ago

cassandra-tools depend on openjdk-8-jre-headless which is only available in jessie-backports repo. Since this is the only version available, it'll be installed:

apt-cache policy openjdk-8-jre-headless
openjdk-8-jre-headless:
  Installed: (none)
  Candidate: 8u121-b13-1~bpo8+1
  Version table:
     8u121-b13-1~bpo8+1 0
        100 http://ftp.debian.org/debian/ jessie-backports/main amd64 Packages

openjdk-8-jre-headless also depends on ca-certificates-java which is available in both official Jessie repos as well as backports. Problem is that by default the version from main repo will be privileged for install:

apt-cache policy ca-certificates-java
ca-certificates-java:
  Installed: (none)
  Candidate: 20140324
  Version table:
     20161107~bpo8+1 0
        100 http://ftp.debian.org/debian/ jessie-backports/main amd64 Packages
     20140324 0
        500 http://deb.debian.org/debian/ jessie/main amd64 Packages
        500 http://ftp.fr.debian.org/debian/ jessie/main amd64 Packages

Since openjdk-8-jre-headless also breaks ca-certificates-java version < 20160321 and the choosen version for install will be 20140324, apt triggers a dependency issue and stop the install.

3 solutions:

  1. Use apt pinning (but you take the risk to install all packages from backports which usually you don't want)
  2. Specify the exact packages version in apt install command line like apt install openjdk-8-jre-headless=8u121-b13-1~bpo8+1 ca-certificates-java=20161107~bpo8+1. Works, but version detection can be painfull
  3. Force jessie-backports repository usage adding -t jessie-backports

I choose the third solution because it's easier ans safer: only needed packages will be picked up from jessie-backport