mirror of
https://github.com/itzg/mc-router.git
synced 2024-11-21 11:25:41 +01:00
Auto-register routes based on kubernetes service annotations
This commit is contained in:
Geoff Bourne
parent
d3d1f36009
commit
2befd24b4a
@ -24,14 +24,16 @@ jobs:
|
||||
|
||||
- restore_cache:
|
||||
keys:
|
||||
- cache-{{ arch }}-{{ .Branch }}-{{ checksum "Gopkg.lock" }}
|
||||
- cache-{{ arch }}-{{ .Branch }}-{{ checksum "glide.lock" }}
|
||||
- cache-{{ arch }}-{{ .Branch }}
|
||||
- cache
|
||||
|
||||
- run: make install-dep
|
||||
- run:
|
||||
name: install dependencies
|
||||
command: glide install
|
||||
|
||||
- save_cache:
|
||||
key: cache-{{ arch }}-{{ .Branch }}-{{ checksum "Gopkg.lock" }}
|
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key: cache-{{ arch }}-{{ .Branch }}-{{ checksum "glide.lock" }}
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paths:
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- vendor
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||||
@ -42,7 +44,9 @@ jobs:
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steps:
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- checkout
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- run: make install-dep
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- run:
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name: install dependencies
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command: glide install
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- setup_remote_docker
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- run: echo $DOCKER_PASSWORD | docker login -u $DOCKER_USER --password-stdin
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63
Gopkg.lock
generated
63
Gopkg.lock
generated
@ -1,63 +0,0 @@
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||||
# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
|
||||
|
||||
|
||||
[[projects]]
|
||||
name = "github.com/alecthomas/kingpin"
|
||||
packages = ["."]
|
||||
revision = "947dcec5ba9c011838740e680966fd7087a71d0d"
|
||||
version = "v2.2.6"
|
||||
|
||||
[[projects]]
|
||||
branch = "master"
|
||||
name = "github.com/alecthomas/template"
|
||||
packages = [
|
||||
".",
|
||||
"parse"
|
||||
]
|
||||
revision = "a0175ee3bccc567396460bf5acd36800cb10c49c"
|
||||
|
||||
[[projects]]
|
||||
branch = "master"
|
||||
name = "github.com/alecthomas/units"
|
||||
packages = ["."]
|
||||
revision = "2efee857e7cfd4f3d0138cc3cbb1b4966962b93a"
|
||||
|
||||
[[projects]]
|
||||
name = "github.com/gorilla/context"
|
||||
packages = ["."]
|
||||
revision = "1ea25387ff6f684839d82767c1733ff4d4d15d0a"
|
||||
version = "v1.1"
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||||
|
||||
[[projects]]
|
||||
name = "github.com/gorilla/mux"
|
||||
packages = ["."]
|
||||
revision = "53c1911da2b537f792e7cafcb446b05ffe33b996"
|
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version = "v1.6.1"
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|
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[[projects]]
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name = "github.com/sirupsen/logrus"
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packages = ["."]
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revision = "c155da19408a8799da419ed3eeb0cb5db0ad5dbc"
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version = "v1.0.5"
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[[projects]]
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branch = "master"
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name = "golang.org/x/crypto"
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packages = ["ssh/terminal"]
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revision = "4ec37c66abab2c7e02ae775328b2ff001c3f025a"
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|
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[[projects]]
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branch = "master"
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name = "golang.org/x/sys"
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packages = [
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"unix",
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"windows"
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]
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revision = "6f686a352de66814cdd080d970febae7767857a3"
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|
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[solve-meta]
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analyzer-name = "dep"
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analyzer-version = 1
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inputs-digest = "8d17b95931fea7bbf18743367ccc152c392add293fe7945ca9ce941ca1482b4f"
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solver-name = "gps-cdcl"
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solver-version = 1
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38
Gopkg.toml
38
Gopkg.toml
@ -1,38 +0,0 @@
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# Gopkg.toml example
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#
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# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
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# for detailed Gopkg.toml documentation.
|
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#
|
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# required = ["github.com/user/thing/cmd/thing"]
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# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
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#
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# [[constraint]]
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# name = "github.com/user/project"
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# version = "1.0.0"
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#
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# [[constraint]]
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# name = "github.com/user/project2"
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# branch = "dev"
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# source = "github.com/myfork/project2"
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#
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# [[override]]
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# name = "github.com/x/y"
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# version = "2.4.0"
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#
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# [prune]
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# non-go = false
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# go-tests = true
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# unused-packages = true
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[prune]
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go-tests = true
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unused-packages = true
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|
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[[constraint]]
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name = "github.com/alecthomas/kingpin"
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version = "2.2.6"
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[[constraint]]
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name = "github.com/sirupsen/logrus"
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version = "1.0.5"
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@ -1,35 +1,36 @@
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package main
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import (
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"net"
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"github.com/itzg/mc-router/server"
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"github.com/alecthomas/kingpin"
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"strconv"
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"github.com/sirupsen/logrus"
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"context"
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"fmt"
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"github.com/alecthomas/kingpin"
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"github.com/itzg/mc-router/server"
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"github.com/sirupsen/logrus"
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"net"
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"os"
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"os/signal"
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"fmt"
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"strconv"
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)
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var (
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port = kingpin.Flag("port", "The port bound to listen for Minecraft client connections").
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Default("25565").Int()
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apiBinding = kingpin.Flag("api-binding", "The host:port bound for servicing API requests").
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String()
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String()
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mappings = kingpin.Flag("mapping", "Mapping of external hostname to internal server host:port").
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StringMap()
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StringMap()
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versionFlag = kingpin.Flag("version", "Output version and exit").
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Bool()
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Bool()
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kubeConfigFile = kingpin.Flag("kube-config", "The path to a kubernetes configuration file").String()
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)
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var (
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version = "dev"
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commit = "none"
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date = "unknown"
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commit = "none"
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date = "unknown"
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)
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func showVersion() {
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func showVersion() {
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fmt.Printf("%v, commit %v, built at %v", version, commit, date)
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}
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@ -54,6 +55,13 @@ func main() {
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server.StartApiServer(*apiBinding)
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}
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err := server.K8sWatcher.Start(*kubeConfigFile)
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if err != nil {
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logrus.WithError(err).Warn("Skipping kubernetes integration")
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} else {
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defer server.K8sWatcher.Stop()
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}
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<-c
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logrus.Info("Stopping")
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cancel()
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238
glide.lock
generated
Normal file
238
glide.lock
generated
Normal file
@ -0,0 +1,238 @@
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||||
hash: d0042501db8c547ec44ff6828ff8b0c7d08561d95311f4c62cf8014e6a02e97e
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updated: 2018-05-26T11:09:13.8257578-05:00
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||||
imports:
|
||||
- name: github.com/alecthomas/kingpin
|
||||
version: 947dcec5ba9c011838740e680966fd7087a71d0d
|
||||
- name: github.com/alecthomas/template
|
||||
version: a0175ee3bccc567396460bf5acd36800cb10c49c
|
||||
subpackages:
|
||||
- parse
|
||||
- name: github.com/alecthomas/units
|
||||
version: 2efee857e7cfd4f3d0138cc3cbb1b4966962b93a
|
||||
- name: github.com/davecgh/go-spew
|
||||
version: 782f4967f2dc4564575ca782fe2d04090b5faca8
|
||||
subpackages:
|
||||
- spew
|
||||
- name: github.com/ghodss/yaml
|
||||
version: 73d445a93680fa1a78ae23a5839bad48f32ba1ee
|
||||
- name: github.com/gogo/protobuf
|
||||
version: c0656edd0d9eab7c66d1eb0c568f9039345796f7
|
||||
subpackages:
|
||||
- proto
|
||||
- sortkeys
|
||||
- name: github.com/golang/glog
|
||||
version: 44145f04b68cf362d9c4df2182967c2275eaefed
|
||||
- name: github.com/golang/protobuf
|
||||
version: 1643683e1b54a9e88ad26d98f81400c8c9d9f4f9
|
||||
subpackages:
|
||||
- proto
|
||||
- ptypes
|
||||
- ptypes/any
|
||||
- ptypes/duration
|
||||
- ptypes/timestamp
|
||||
- name: github.com/google/gofuzz
|
||||
version: 44d81051d367757e1c7c6a5a86423ece9afcf63c
|
||||
- name: github.com/googleapis/gnostic
|
||||
version: 0c5108395e2debce0d731cf0287ddf7242066aba
|
||||
subpackages:
|
||||
- OpenAPIv2
|
||||
- compiler
|
||||
- extensions
|
||||
- name: github.com/gorilla/context
|
||||
version: 08b5f424b9271eedf6f9f0ce86cb9396ed337a42
|
||||
- name: github.com/gorilla/mux
|
||||
version: e3702bed27f0d39777b0b37b664b6280e8ef8fbf
|
||||
- name: github.com/hashicorp/golang-lru
|
||||
version: a0d98a5f288019575c6d1f4bb1573fef2d1fcdc4
|
||||
subpackages:
|
||||
- simplelru
|
||||
- name: github.com/howeyc/gopass
|
||||
version: bf9dde6d0d2c004a008c27aaee91170c786f6db8
|
||||
- name: github.com/imdario/mergo
|
||||
version: 6633656539c1639d9d78127b7d47c622b5d7b6dc
|
||||
- name: github.com/json-iterator/go
|
||||
version: 13f86432b882000a51c6e610c620974462691a97
|
||||
- name: github.com/pkg/errors
|
||||
version: 645ef00459ed84a119197bfb8d8205042c6df63d
|
||||
- name: github.com/sirupsen/logrus
|
||||
version: c155da19408a8799da419ed3eeb0cb5db0ad5dbc
|
||||
- name: github.com/spf13/pflag
|
||||
version: 4c012f6dcd9546820e378d0bdda4d8fc772cdfea
|
||||
- name: golang.org/x/crypto
|
||||
version: a3beeb748656e13e54256fd2cde19e058f41f60f
|
||||
subpackages:
|
||||
- ssh/terminal
|
||||
- name: golang.org/x/net
|
||||
version: 1c05540f6879653db88113bc4a2b70aec4bd491f
|
||||
subpackages:
|
||||
- context
|
||||
- context/ctxhttp
|
||||
- http2
|
||||
- http2/hpack
|
||||
- idna
|
||||
- lex/httplex
|
||||
- name: golang.org/x/sys
|
||||
version: 95c6576299259db960f6c5b9b69ea52422860fce
|
||||
subpackages:
|
||||
- unix
|
||||
- windows
|
||||
- name: golang.org/x/text
|
||||
version: b19bf474d317b857955b12035d2c5acb57ce8b01
|
||||
subpackages:
|
||||
- secure/bidirule
|
||||
- transform
|
||||
- unicode/bidi
|
||||
- unicode/norm
|
||||
- name: golang.org/x/time
|
||||
version: f51c12702a4d776e4c1fa9b0fabab841babae631
|
||||
subpackages:
|
||||
- rate
|
||||
- name: gopkg.in/inf.v0
|
||||
version: 3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4
|
||||
- name: gopkg.in/yaml.v2
|
||||
version: 670d4cfef0544295bc27a114dbac37980d83185a
|
||||
- name: k8s.io/api
|
||||
version: 73d903622b7391f3312dcbac6483fed484e185f8
|
||||
subpackages:
|
||||
- admissionregistration/v1alpha1
|
||||
- admissionregistration/v1beta1
|
||||
- apps/v1
|
||||
- apps/v1beta1
|
||||
- apps/v1beta2
|
||||
- authentication/v1
|
||||
- authentication/v1beta1
|
||||
- authorization/v1
|
||||
- authorization/v1beta1
|
||||
- autoscaling/v1
|
||||
- autoscaling/v2beta1
|
||||
- batch/v1
|
||||
- batch/v1beta1
|
||||
- batch/v2alpha1
|
||||
- certificates/v1beta1
|
||||
- core/v1
|
||||
- events/v1beta1
|
||||
- extensions/v1beta1
|
||||
- imagepolicy/v1alpha1
|
||||
- networking/v1
|
||||
- policy/v1beta1
|
||||
- rbac/v1
|
||||
- rbac/v1alpha1
|
||||
- rbac/v1beta1
|
||||
- scheduling/v1alpha1
|
||||
- settings/v1alpha1
|
||||
- storage/v1
|
||||
- storage/v1alpha1
|
||||
- storage/v1beta1
|
||||
- name: k8s.io/apimachinery
|
||||
version: 302974c03f7e50f16561ba237db776ab93594ef6
|
||||
subpackages:
|
||||
- pkg/api/equality
|
||||
- pkg/api/errors
|
||||
- pkg/api/meta
|
||||
- pkg/api/resource
|
||||
- pkg/api/testing
|
||||
- pkg/api/testing/fuzzer
|
||||
- pkg/api/testing/roundtrip
|
||||
- pkg/apimachinery
|
||||
- pkg/apimachinery/announced
|
||||
- pkg/apimachinery/registered
|
||||
- pkg/apis/meta/fuzzer
|
||||
- pkg/apis/meta/internalversion
|
||||
- pkg/apis/meta/v1
|
||||
- pkg/apis/meta/v1/unstructured
|
||||
- pkg/apis/meta/v1beta1
|
||||
- pkg/conversion
|
||||
- pkg/conversion/queryparams
|
||||
- pkg/fields
|
||||
- pkg/labels
|
||||
- pkg/runtime
|
||||
- pkg/runtime/schema
|
||||
- pkg/runtime/serializer
|
||||
- pkg/runtime/serializer/json
|
||||
- pkg/runtime/serializer/protobuf
|
||||
- pkg/runtime/serializer/recognizer
|
||||
- pkg/runtime/serializer/streaming
|
||||
- pkg/runtime/serializer/versioning
|
||||
- pkg/selection
|
||||
- pkg/types
|
||||
- pkg/util/cache
|
||||
- pkg/util/clock
|
||||
- pkg/util/diff
|
||||
- pkg/util/errors
|
||||
- pkg/util/framer
|
||||
- pkg/util/httpstream
|
||||
- pkg/util/httpstream/spdy
|
||||
- pkg/util/intstr
|
||||
- pkg/util/json
|
||||
- pkg/util/mergepatch
|
||||
- pkg/util/net
|
||||
- pkg/util/remotecommand
|
||||
- pkg/util/runtime
|
||||
- pkg/util/sets
|
||||
- pkg/util/strategicpatch
|
||||
- pkg/util/validation
|
||||
- pkg/util/validation/field
|
||||
- pkg/util/wait
|
||||
- pkg/util/yaml
|
||||
- pkg/version
|
||||
- pkg/watch
|
||||
- third_party/forked/golang/json
|
||||
- third_party/forked/golang/netutil
|
||||
- third_party/forked/golang/reflect
|
||||
- name: k8s.io/client-go
|
||||
version: 23781f4d6632d88e869066eaebb743857aa1ef9b
|
||||
subpackages:
|
||||
- discovery
|
||||
- kubernetes
|
||||
- kubernetes/scheme
|
||||
- kubernetes/typed/admissionregistration/v1alpha1
|
||||
- kubernetes/typed/admissionregistration/v1beta1
|
||||
- kubernetes/typed/apps/v1
|
||||
- kubernetes/typed/apps/v1beta1
|
||||
- kubernetes/typed/apps/v1beta2
|
||||
- kubernetes/typed/authentication/v1
|
||||
- kubernetes/typed/authentication/v1beta1
|
||||
- kubernetes/typed/authorization/v1
|
||||
- kubernetes/typed/authorization/v1beta1
|
||||
- kubernetes/typed/autoscaling/v1
|
||||
- kubernetes/typed/autoscaling/v2beta1
|
||||
- kubernetes/typed/batch/v1
|
||||
- kubernetes/typed/batch/v1beta1
|
||||
- kubernetes/typed/batch/v2alpha1
|
||||
- kubernetes/typed/certificates/v1beta1
|
||||
- kubernetes/typed/core/v1
|
||||
- kubernetes/typed/events/v1beta1
|
||||
- kubernetes/typed/extensions/v1beta1
|
||||
- kubernetes/typed/networking/v1
|
||||
- kubernetes/typed/policy/v1beta1
|
||||
- kubernetes/typed/rbac/v1
|
||||
- kubernetes/typed/rbac/v1alpha1
|
||||
- kubernetes/typed/rbac/v1beta1
|
||||
- kubernetes/typed/scheduling/v1alpha1
|
||||
- kubernetes/typed/settings/v1alpha1
|
||||
- kubernetes/typed/storage/v1
|
||||
- kubernetes/typed/storage/v1alpha1
|
||||
- kubernetes/typed/storage/v1beta1
|
||||
- pkg/apis/clientauthentication
|
||||
- pkg/apis/clientauthentication/v1alpha1
|
||||
- pkg/version
|
||||
- plugin/pkg/client/auth/exec
|
||||
- rest
|
||||
- rest/watch
|
||||
- tools/auth
|
||||
- tools/cache
|
||||
- tools/clientcmd
|
||||
- tools/clientcmd/api
|
||||
- tools/clientcmd/api/latest
|
||||
- tools/clientcmd/api/v1
|
||||
- tools/metrics
|
||||
- tools/pager
|
||||
- tools/reference
|
||||
- transport
|
||||
- util/buffer
|
||||
- util/cert
|
||||
- util/flowcontrol
|
||||
- util/homedir
|
||||
- util/integer
|
||||
- util/retry
|
||||
testImports: []
|
||||
16
glide.yaml
Normal file
16
glide.yaml
Normal file
@ -0,0 +1,16 @@
|
||||
package: github.com/itzg/mc-router
|
||||
import:
|
||||
- package: github.com/alecthomas/kingpin
|
||||
version: ^2.2.6
|
||||
- package: github.com/gorilla/mux
|
||||
version: ^1.6.2
|
||||
- package: github.com/pkg/errors
|
||||
version: ^0.8.0
|
||||
- package: github.com/sirupsen/logrus
|
||||
version: ^1.0.5
|
||||
- package: k8s.io/client-go
|
||||
version: ^7.0.0
|
||||
subpackages:
|
||||
- kubernetes
|
||||
- tools/cache
|
||||
- tools/clientcmd
|
||||
122
server/k8s.go
Normal file
122
server/k8s.go
Normal file
@ -0,0 +1,122 @@
|
||||
package server
|
||||
|
||||
import (
|
||||
"github.com/pkg/errors"
|
||||
"github.com/sirupsen/logrus"
|
||||
"k8s.io/api/core/v1"
|
||||
"k8s.io/apimachinery/pkg/fields"
|
||||
"k8s.io/client-go/kubernetes"
|
||||
"k8s.io/client-go/tools/cache"
|
||||
"k8s.io/client-go/tools/clientcmd"
|
||||
"net"
|
||||
)
|
||||
|
||||
type IK8sWatcher interface {
|
||||
Start(kubeConfigFile string) error
|
||||
Stop()
|
||||
}
|
||||
|
||||
var K8sWatcher IK8sWatcher = &k8sWatcherImpl{}
|
||||
|
||||
type k8sWatcherImpl struct {
|
||||
stop chan struct{}
|
||||
}
|
||||
|
||||
func (w *k8sWatcherImpl) Start(kubeConfigFile string) error {
|
||||
config, err := clientcmd.BuildConfigFromFlags("", kubeConfigFile)
|
||||
if err != nil {
|
||||
return errors.Wrap(err, "Could not load kube config file")
|
||||
}
|
||||
|
||||
clientset, err := kubernetes.NewForConfig(config)
|
||||
if err != nil {
|
||||
return errors.Wrap(err, "Could not create kube clientset")
|
||||
}
|
||||
|
||||
watchlist := cache.NewListWatchFromClient(
|
||||
clientset.CoreV1().RESTClient(),
|
||||
string(v1.ResourceServices),
|
||||
v1.NamespaceAll,
|
||||
fields.Everything(),
|
||||
)
|
||||
|
||||
_, controller := cache.NewInformer(
|
||||
watchlist,
|
||||
&v1.Service{},
|
||||
0,
|
||||
cache.ResourceEventHandlerFuncs{
|
||||
AddFunc: func(obj interface{}) {
|
||||
routableService := extractRoutableService(obj)
|
||||
if routableService != nil {
|
||||
logrus.WithField("routableService", routableService).Debug("ADD")
|
||||
|
||||
Routes.CreateMapping(routableService.externalServiceName, routableService.containerEndpoint)
|
||||
}
|
||||
},
|
||||
DeleteFunc: func(obj interface{}) {
|
||||
routableService := extractRoutableService(obj)
|
||||
if routableService != nil {
|
||||
logrus.WithField("routableService", routableService).Debug("DELETE")
|
||||
|
||||
Routes.DeleteMapping(routableService.externalServiceName)
|
||||
}
|
||||
},
|
||||
UpdateFunc: func(oldObj, newObj interface{}) {
|
||||
oldRoutableService := extractRoutableService(oldObj)
|
||||
newRoutableService := extractRoutableService(newObj)
|
||||
if oldRoutableService != nil && newRoutableService != nil {
|
||||
logrus.WithFields(logrus.Fields{
|
||||
"old": oldRoutableService,
|
||||
"new": newRoutableService,
|
||||
}).Debug("UPDATE")
|
||||
|
||||
Routes.DeleteMapping(oldRoutableService.externalServiceName)
|
||||
Routes.CreateMapping(newRoutableService.externalServiceName, newRoutableService.containerEndpoint)
|
||||
}
|
||||
},
|
||||
},
|
||||
)
|
||||
|
||||
w.stop = make(chan struct{}, 1)
|
||||
logrus.Info("Monitoring kubernetes for minecraft services")
|
||||
go controller.Run(w.stop)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (w *k8sWatcherImpl) Stop() {
|
||||
if w.stop != nil {
|
||||
w.stop <- struct{}{}
|
||||
}
|
||||
}
|
||||
|
||||
type routableService struct {
|
||||
externalServiceName string
|
||||
containerEndpoint string
|
||||
}
|
||||
|
||||
func extractRoutableService(obj interface{}) *routableService {
|
||||
service, ok := obj.(*v1.Service)
|
||||
if !ok {
|
||||
return nil
|
||||
}
|
||||
|
||||
if externalServiceName, exists := service.Annotations["mc-router.itzg.me/externalServerName"]; exists {
|
||||
clusterIp := service.Spec.ClusterIP
|
||||
port := "25565"
|
||||
for _, p := range service.Spec.Ports {
|
||||
if p.Port == 25565 {
|
||||
if p.TargetPort.String() != "" {
|
||||
port = p.TargetPort.String()
|
||||
}
|
||||
}
|
||||
}
|
||||
rs := &routableService{
|
||||
externalServiceName: externalServiceName,
|
||||
containerEndpoint: net.JoinHostPort(clusterIp, port),
|
||||
}
|
||||
return rs
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user