[FLINK-17033] Upgrade OpenJDK docker image for Kubernetes

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.11.0, 1.12.0
• Component/s: Deployment / Kubernetes
• Assignee: Unassigned
• Reporter: Canbin Zheng
• Created: 07/Apr/20 09:35
• Updated: 05/Jun/20 04:04
• Resolved: 05/Jun/20 04:04

Description

The current docker image openjdk:8-jre-alpine used by Kubernetes has many problems, here is some of them:

1. There is no official support for this image since the commit https://github.com/docker-library/openjdk/commit/3eb0351b208d739fac35345c85e3c6237c2114ec#diff-f95ffa3d1377774732c33f7b8368e099
2. DNS-lookup-5s-delay
3. DNS resolver does not read /etc/hosts
4. It uses musl libc instead of glibc. This could cause a problem if we want to run native library like intel MKL for native BLAS support

Therefore, this ticket proposes to investigate an alternative official JDK docker image; I think it's a good choice to use openjdk:8-jre-slim(184MB) instead, the reasons are as follows:

1. It has official support from openjdk: https://github.com/docker-library/docs/blob/master/openjdk/README.md#supported-tags-and-respective-dockerfile-links
2. It is based on debian and does not have many problems such as DNS lookup delay.
3. It's much smaller in size than other official docker images.