2020-08-10 lifeng release 2.0.4
    - !640 code: add DEL fd from epoll when fail Merge pull request !640 from lifeng_isula/master
    - !641 devmapper: optimize error processing log Merge pull request !641 from gaohuatao/update
    - !639 ReadME: add contact ways for contributors to follow Merge pull request !639 from haomintsai/add-maillist
    - !638 storage: add image layers exists Merge pull request !638 from lifeng_isula/master
    - !637  View coderestore: do not remove container when restart state failed Merge pull request !637 from lifeng_isula/master
    - !636 readme: fix performance title Merge pull request !636 from haozi007/master
    - !635 image: fix coredump when create image/rootfs failed Merge pull request !635 from lifeng_isula/master
    - !634 image: remove needless if Merge pull request !634 from haozi007/master
    - !633 devmapper: remove invalid tmp metadata file Merge pull request !633 from gaohuatao/update
    - !632 refector: fix cri code according to coding standards Merge pull request !632 from JingWoo/master
    - !631 devmapper:fix update bug that base file removed and container inspect Merge pull request !631 from gaohuatao/update
    - !630 refector: modernize cpp code Merge pull request !630 from JingWoo/master
    - !629 do not retry if cancelled Merge pull request !629 from wangfengtu/no_retry
    - !627 iSulad : add debug packages Merge pull request !627 from YoungJQ/master
    - !628 performance test Merge pull request !628 from haozi007/master
    - !626 add more unit test for pulling image Merge pull request !626 from wangfengtu/fix_logout
    - !625 clean code: rename pause_container to do_pause_container Merge pull request !625 from lifeng_isula/master
    - !624 retry fetch manifest if failed Merge pull request !624 from wangfengtu/retry_manifest
    - !623 try print error message like before Merge pull request !623 from wangfengtu/echo_back
    - !622 fix: Remove the lock and force deletion Merge pull request !622 from JingWoo/master
    - !621 enhance stability of auths Merge pull request !621 from wangfengtu/auths
    - !620 devmapper: add status interface semaphore info Merge pull request !620 from gaohuatao/update
    - !619 fix login success even if server response unauthorized Merge pull request !619 from wangfengtu/login
    - !618 devmapper: When thinpool has no space  left, echo err info Merge pull request !618 from gaohuatao/update
    - !617 resume pulling layers Merge pull request !617 from wangfengtu/resume
    - !616 quota: use default quota size when specify size=0 Merge pull request !616 from lifeng_isula/master
    - !615 stats: stats --original show correct container name Merge pull request !615 from Zhangxiaoyu/master
    - !613 image: move internal struct defines to image.c Merge pull request !613 from lifeng_isula/master
    - !614 fix cann't logout by image Merge pull request !614 from wangfengtu/logout
    - !611 concurrent pull layers Merge pull request !611 from wangfengtu/fast_pull
    - !612 devmapper: surpport update from isulad-img Merge pull request !612 from gaohuatao/update
    - !610 iSulad：add source file to libisulad_img.so Merge pull request !610 from Jackey_1024/master
    - !607 fix check image error Merge pull request !607 from haozi007/master
    - !609 add layer_store_ut code Merge pull request !609 from Zhangxiaoyu/master
    - !608 iSulad: remove big-data related codes of rootfs_store Merge pull request !608 from Jackey_1024/master
    - !606 devmapper: format codes to unify style and delete unused comments Merge pull request !606 from gaohuatao/master_dev1
    - !605 isula stats: add --original option to show original data Merge pull request !605 from Zhangxiaoyu/master
    - !604 image: only check embedded image in use at service module Merge pull request !604 from lifeng_isula/master
    - !603 iSulad-img: remove iSulad-img from build guilde Merge pull request !603 from lifeng_isula/master
    - !602 interface: remove image operate time out arguments Merge pull request !602 from lifeng_isula/master
    - !601 Image:  merge implement_image to master Merge pull request !601 from lifeng_isula/image
    - !586 Removes the definition of the thread attributes object Merge pull request !586 from JingWoo/master
    - !580 tools: add generate release notes Merge pull request !580 from lifeng_isula/master
    - !572 lxc: update lxc to 4.0.3 Merge pull request !572 from lifeng_isula/master
    - !530 修复websocket限流可能引起卡死 Merge pull request !530 from JingWoo/master
    - !550 build: add checkout LTS tag for third party software Merge pull request !550 from lifeng_isula/master
    - !523 init struct before use it Merge pull request !523 from haozi007/work
    - !519 fix create mtab bug to use lstat Merge pull request !519 from gaohuatao/ci_master
    - !517 events: fix wrong format of exec command Merge pull request !517 from lifeng_isula/master
    - !518 add -d/--disk param for CI Merge pull request !518 from gaohuatao/ci_master
    - !494 CI: add testcases use host rootfs / Merge pull request !494 from lifeng_isula/master
    - !492 Fix label-file reading bug Merge pull request !492 from JingWoo/master
    - !485 fix bug of creating symlink for /etc/mtab when /etc symlink exists Merge pull request !485 from gaohuatao/master_mtab
    - !489 Add Pull Request Template And Issue Template Merge pull request !489 from JingWoo/master
    - !487 iSulad: resolve coredump of isula inspect "" Merge pull request !487 from Jackey_1024/ma_0623
    - !467 isulad-shim: fix probabilistic bad fd Merge pull request !467 from zklei/epoll_ctl
    - !465 Release v2.0.3 Merge pull request !465 from lifeng_isula/master
    - !464 iSulad: change llt to ut Merge pull request !464 from Jackey_1024/0616

    dev stats:
      - 1029 files changed, 127349 insertions(+), 99155 deletions(-)
      - contributors: lifeng68, wujing, WangFengTu, gaohuatao, LiFeng, haozi007, jikui, Zhangxiaoyu, zhangxiaoyu, Haomin, YoungJQ, farm, leizhongkai