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plugin/host: don't append the names when reparsing hosts file (#3045)

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The host plugin kept on adding entries instead of overwriting. Split the
inline cache off from the /etc/hosts file cache and clear /etc/hosts
file cache and re-parsing.

A bunch of other cleanup as well. Use functions defined in the plugin
package, don't re-parse strings if you don't have to and use To4() to
check the family for IP addresses. Fix all test cases a carried entries
are always fqdn-ed. Various smaller cleanup in unnessacry constants.

Fixes: #3014

Signed-off-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Miek Gieben
2019-07-25 18:53:07 +00:00
committed by Yong Tang
parent 2a41b9a93b
commit 89fa9bc61e
9 changed files with 147 additions and 171 deletions
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go.mod
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@@ -54,6 +54,7 @@ require (
golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 // indirect
golang.org/x/net v0.0.0-20190628185345-da137c7871d7 // indirect
golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 // indirect
google.golang.org/genproto v0.0.0-20190701230453-710ae3a149df // indirect
google.golang.org/grpc v1.22.0
gopkg.in/DataDog/dd-trace-go.v1 v1.16.0