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add cluster hash grouping
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Signed-off-by: Seán C McCord <ulexus@gmail.com>
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@Ulexus
Ulexus committed May 9, 2021
1 parent f982696 commit 5e0c1df
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Showing 5 changed files with 145 additions and 20 deletions.
56 changes: 45 additions & 11 deletions db/db.go
View file
Original file line number Diff line number Diff line change
@@ -1,43 +1,53 @@
package db

import (
"fmt"
"sync"

"github.com/talos-systems/wglan-manager/types"
)

type DB interface {
// AddEndpoints adds a set of known Endpoints to a node, creating the node, if it does not exist.
AddEndpoints(id string, ep []string) error
AddEndpoints(cluster, id string, ep []string) error

// Get returns the details of the node.
Get(id string) *types.Node
Get(cluster, id string) (*types.Node,error)

// List returns the set of Nodes for the given Cluster.
List(cluster string) ([]*types.Node,error)
}

type ramDB struct {
db map[string]*types.Node
db map[string]map[string]*types.Node
mu sync.RWMutex
}

// New returns a new database.
func New() DB {
return &ramDB{
db: make(map[string]*types.Node),
db: make(map[string]map[string]*types.Node),
}
}

// AddEndpoints implements DB
func (d *ramDB) AddEndpoints(id string, endpoints []string) error {
func (d *ramDB) AddEndpoints(cluster, id string, endpoints []string) error {
d.mu.Lock()
defer d.mu.Unlock()

n, ok := d.db[id]
c, ok := d.db[cluster]
if !ok {
c = make(map[string]*types.Node)
d.db[cluster] = c
}

n, ok := c[id]
if !ok {
n = &types.Node{
ID: id,
}

d.db[id] = n
c[id] = n
}

var found bool
Expand All @@ -59,15 +69,39 @@ func (d *ramDB) AddEndpoints(id string, endpoints []string) error {
return nil
}

func (d *ramDB) List(cluster string) (list []*types.Node, err error) {
c, ok := d.db[cluster]
if !ok {
return nil, fmt.Errorf("cluster %q not found", cluster)
}

var i int

list = make([]*types.Node, len(c))

for _, n := range c {
list[i] = n

i++
}

return list, nil
}

// Get implements DB
func (d *ramDB) Get(id string) *types.Node {
func (d *ramDB) Get(cluster, id string) (*types.Node,error) {
d.mu.RLock()
defer d.mu.Unlock()

n, ok := d.db[id]
c, ok := d.db[cluster]
if !ok {
return nil, fmt.Errorf("cluster %q not found", cluster)
}

n, ok := c[id]
if !ok {
return nil
return nil, fmt.Errorf("node %q in cluster %q not found", id, cluster)
}

return n
return n, nil
}
1 change: 1 addition & 0 deletions go.mod
View file
Original file line number Diff line number Diff line change
Expand Up @@ -5,4 +5,5 @@ go 1.16
require (
github.com/gofiber/fiber v1.14.6 // indirect
github.com/gofiber/fiber/v2 v2.8.0 // indirect
go.uber.org/zap v1.16.0 // indirect
)
38 changes: 38 additions & 0 deletions go.sum
View file
Original file line number Diff line number Diff line change
@@ -1,24 +1,38 @@
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDafo4=
github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
github.com/andybalholm/brotli v1.0.1 h1:KqhlKozYbRtJvsPrrEeXcO+N2l6NYT5A2QAFmSULpEc=
github.com/andybalholm/brotli v1.0.1/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/gofiber/fiber v1.14.6 h1:QRUPvPmr8ijQuGo1MgupHBn8E+wW0IKqiOvIZPtV70o=
github.com/gofiber/fiber v1.14.6/go.mod h1:Yw2ekF1YDPreO9V6TMYjynu94xRxZBdaa8X5HhHsjCM=
github.com/gofiber/fiber/v2 v2.8.0 h1:BdWvZmg/WY/Vjtjm38aXOp1Lks1BhuyS2b7lSWSPAzk=
github.com/gofiber/fiber/v2 v2.8.0/go.mod h1:Ah3IJikrKNRepl/HuVawppS25X7FWohwfCSRn7kJG28=
github.com/gofiber/utils v0.0.10 h1:3Mr7X7JdCUo7CWf/i5sajSaDmArEDtti8bM1JUVso2U=
github.com/gofiber/utils v0.0.10/go.mod h1:9J5aHFUIjq0XfknT4+hdSMG6/jzfaAgCu4HEbWDeBlo=
github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
github.com/gorilla/schema v1.1.0 h1:CamqUDOFUBqzrvxuz2vEwo8+SUdwsluFh7IlzJh30LY=
github.com/gorilla/schema v1.1.0/go.mod h1:kgLaKoK1FELgZqMAVxx/5cbj0kT+57qxUrAlIO2eleU=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
github.com/klauspost/compress v1.10.7 h1:7rix8v8GpI3ZBb0nSozFRgbtXKv+hOe+qfEpZqybrAg=
github.com/klauspost/compress v1.10.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
github.com/klauspost/compress v1.11.8/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
github.com/klauspost/compress v1.11.13 h1:eSvu8Tmq6j2psUJqJrLcWH6K3w5Dwc+qipbaA6eVEN4=
github.com/klauspost/compress v1.11.13/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
github.com/mattn/go-colorable v0.1.7 h1:bQGKb3vps/j0E9GfJQ03JyhRuxsvdAanXlT9BTw3mdw=
github.com/mattn/go-colorable v0.1.7/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
github.com/valyala/fasthttp v1.16.0 h1:9zAqOYLl8Tuy3E5R6ckzGDJ1g8+pw15oQp2iL9Jl6gQ=
Expand All @@ -27,12 +41,26 @@ github.com/valyala/fasthttp v1.23.0 h1:0ufwSD9BhWa6f8HWdmdq4FHQ23peRo3Ng/Qs8m5Nc
github.com/valyala/fasthttp v1.23.0/go.mod h1:0mw2RjXGOzxf4NL2jni3gUQ7LfjjUSiG5sskOUUSEpU=
github.com/valyala/tcplisten v0.0.0-20161114210144-ceec8f93295a h1:0R4NLDRDZX6JcmhJgXi5E4b8Wg84ihbmUKp/GvSPEzc=
github.com/valyala/tcplisten v0.0.0-20161114210144-ceec8f93295a/go.mod h1:v3UYOV9WzVtRmSR+PDvWpU/qWl4Wa5LApYYX4ZtKbio=
go.uber.org/atomic v1.6.0 h1:Ezj3JGmsOnG1MoRWQkPBsKLe9DwWD9QeXzTRzzldNVk=
go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
go.uber.org/multierr v1.5.0 h1:KCa4XfM8CWFCpxXRGok+Q0SS/0XBhMDbHHGABQLvD2A=
go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee/go.mod h1:vJERXedbb3MVM5f9Ejo0C68/HhF8uaILCdgjnY+goOA=
go.uber.org/zap v1.16.0 h1:uFRZXykJGK9lLY4HtgSw44DnIcAM+kRBP7x5m+NpAOM=
go.uber.org/zap v1.16.0/go.mod h1:MA8QOfq0BHJwdXa996Y4dYkAqRKB8/1K1QMMZVaNZjQ=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200602114024-627f9648deb9/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20210226101413-39120d07d75e/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
Expand All @@ -48,3 +76,13 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
68 changes: 59 additions & 9 deletions main.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -5,11 +5,11 @@ import (
"log"
"net/http"
"os"
"strings"

"github.com/gofiber/fiber/v2"
"github.com/talos-systems/wglan-manager/db"
"github.com/talos-systems/wglan-manager/types"
"go.uber.org/zap"
)

var listenAddr = ":3000"
Expand All @@ -26,38 +26,88 @@ func main() {

flag.Parse()

logger, err := zap.NewProduction()
if err != nil {
log.Fatalln("failed to initialise logger:", err)
}

if os.Getenv("MODE") == "dev" {
devMode = true
logger, err = zap.NewDevelopment()
if err != nil {
log.Fatalln("failed to initialise development logger:", err)
}
}

defer logger.Sync()

nodeDB = db.New()

app := fiber.New()

app.Get("/:id", func(c *fiber.Ctx) error {
n := nodeDB.Get(c.Get("id", ""))
if n == nil {
app.Get("/:cluster", func(c *fiber.Ctx) error {
cluster := c.Get("cluster")
if cluster == "" {
return c.SendStatus(http.StatusBadRequest)
}

list, err := nodeDB.List(cluster)
if len(list) < 1 {
logger.Warn("cluster not found: ",
zap.String("cluster", cluster),
zap.Error(err),
)
return c.SendStatus(http.StatusNotFound)
}

return c.JSON(n)
return c.JSON(list)

})

app.Get("/:cluster/:node", func(c *fiber.Ctx) error {
cluster := c.Get("cluster", "")
if cluster == "" {
return c.SendStatus(http.StatusBadRequest)
}

node := c.Get("node", "")
if node == "" {
return c.SendStatus(http.StatusBadRequest)
}

list, err := nodeDB.List(cluster)
if len(list) < 1 {
logger.Warn("cluster empty",
zap.String("cluster", cluster),
zap.Error(err),
)
return c.SendStatus(http.StatusNotFound)
}

return c.JSON(list)
})

app.Post("/:id", func(c *fiber.Ctx) error {
app.Post("/:cluster", func(c *fiber.Ctx) error {
n := new(types.Node)

if err := c.BodyParser(n); err != nil {
return c.SendStatus(http.StatusBadRequest)
}

if err := nodeDB.AddEndpoints(n.ID, n.KnownEndpoints); err != nil {
log.Printf("failed to add endpoints %q to node %s: %v", strings.Join(n.KnownEndpoints,","), n.ID, err)
if err := nodeDB.AddEndpoints(c.Get("cluster", ""), n.ID, n.KnownEndpoints); err != nil {
logger.Error("failed to add endpoints to node",
zap.String("cluster", c.Get("cluster", "")),
zap.String("node", n.ID),
zap.Strings("endpoints", n.KnownEndpoints),
zap.Error(err),
)
return c.SendStatus(http.StatusInternalServerError)
}

return c.SendStatus(http.StatusNoContent)
})

log.Fatal(app.Listen(listenAddr))
logger.Fatal("listen exited",
zap.Error(app.Listen(listenAddr)),
)
}
2 changes: 2 additions & 0 deletions types/types.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4,5 +4,7 @@ package types
type Node struct {
ID string

IP string

KnownEndpoints []string
}

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