bugfix: get ip address by hostname -i

[zhuangqh]

Ⅰ. Describe what this PR did

Get ip address by hostname -i if there is no default route, or fail to initialize the cri of pouchd.
Signed-off-by: Rudy Zhang rudyflyzhang@gmail.com

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)? (你真的觉得不需要加测试吗？)

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #2367 into master will decrease coverage by 1.38%.
The diff coverage is 10.52%.

@@            Coverage Diff             @@
##           master    #2367      +/-   ##
==========================================
- Coverage   68.08%   66.69%   -1.39%     
==========================================
  Files         265      280      +15     
  Lines       18210    19118     +908     
==========================================
+ Hits        12398    12751     +353     
- Misses       4390     4908     +518     
- Partials     1422     1459      +37

Flag	Coverage Δ
#criv1alpha1test	31.58% <10.52%> (-0.03%)	⬇️
#criv1alpha2test	35.8% <10.52%> (+0.31%)	⬆️
#integrationtest	39.54% <0%> (-0.01%)	⬇️
#nodee2etest	33.19% <10.52%> (+0.07%)	⬆️
#unittest	25.49% <0%> (+0.18%)	⬆️

Impacted Files	Coverage Δ
pkg/netutils/interface.go	88.94% <10.52%> (-6.9%)	⬇️
cri/v1alpha2/cri_types.go	50% <0%> (-50%)	⬇️
cri/v1alpha2/cri.go	48.37% <0%> (-19.95%)	⬇️
cri/criservice.go	45.71% <0%> (-10.24%)	⬇️
daemon/config/config.go	39.28% <0%> (-8.66%)	⬇️
cri/v1alpha2/cri_utils.go	85% <0%> (-5.86%)	⬇️
daemon/mgr/snapshot.go	89.85% <0%> (-4.35%)	⬇️
daemon/mgr/events.go	96.29% <0%> (-3.71%)	⬇️
ctrd/client.go	66.92% <0%> (-2.31%)	⬇️
daemon/mgr/container_validation.go	44.37% <0%> (-1.33%)	⬇️
... and 23 more

[rudyfly]

LGTM