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Support multiple k8s api servers specification and load balance among api servers (#820)

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* Support multiple k8s api servers specification and load balance among api servers

This fix adds supports for multiple k8s api servers specification,
load balance among api servers.

When two or more api servers are specified in kubernetes block (endpoint ...),
a proxy is created locally (with randomly generately port). The coredns
will points to the generated proxy so that load balancing could be achieved.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Setup initial healthcheck at the beginning

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Update README.md for kubernetes middleware and remove whitespaces.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Use middleware/pkg/healthcheck in middleware/kubernetes

for api proxy

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This commit is contained in:
Yong Tang
2017-08-10 17:14:56 -07:00
committed by GitHub
parent acfa6501e0
commit 26d8680a11
6 changed files with 171 additions and 5 deletions
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1
middleware/pkg/healthcheck/healthcheck.go
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@@ -19,6 +19,7 @@ type UpstreamHostDownFunc func(*UpstreamHost) bool
type UpstreamHost struct {
Conns int64 // must be first field to be 64-bit aligned on 32-bit systems
Name string // IP address (and port) of this upstream host
Network string // Network (tcp, unix, etc) of the host, default "" is "tcp"
Fails int32
FailTimeout time.Duration
OkUntil time.Time