read options from env

What is the purpose of the change

read options from env

read options from env

Follow this checklist to help us incorporate your contribution quickly and easily:

[ ] Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
[ ] Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
[ ] Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
[ ] Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist.
[ ] Run `mvn clean compile --batch-mode -DskipTests=false -Dcheckstyle.skip=false -Drat.skip=false -Dmaven.javadoc.skip=true to make sure basic checks pass.