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Support filters based on consul meta
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Emilien Kenler
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Oct 7, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package consul | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "github.com/hashicorp/consul/api" | ||
| "github.com/patrickmn/go-cache" | ||
| ) | ||
|
|
||
| var nodeCache *cache.Cache | ||
|
|
||
| func init() { | ||
| nodeCache = cache.New(5*time.Minute, 10*time.Minute) | ||
| err := loadEverything() | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| } | ||
| } | ||
|
|
||
| func loadEverything() error { | ||
| client, err := api.NewClient(&api.Config{}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| dcs, err := client.Catalog().Datacenters() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, dc := range dcs { | ||
| nodes, _, err := client.Catalog().Nodes(&api.QueryOptions{ | ||
| Datacenter: dc, | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, n := range nodes { | ||
| if n != nil { | ||
| nodeCache.Set(n.Node, n, cache.DefaultExpiration) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func GetNode(host string) (*api.Node, error) { | ||
| n, found := nodeCache.Get(host) | ||
| if found { | ||
| return n.(*api.Node), nil | ||
| } | ||
|
|
||
| client, err := api.NewClient(&api.Config{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| dcs, err := client.Catalog().Datacenters() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| var node *api.CatalogNode | ||
| for _, dc := range dcs { | ||
| var err error | ||
| if node, _, err = client.Catalog().Node(host, &api.QueryOptions{ | ||
| Datacenter: dc, | ||
| }); err != nil { | ||
| return nil, err | ||
| } | ||
| if node != nil { | ||
| break | ||
| } | ||
| } | ||
|
|
||
| if node == nil { | ||
| return nil, nil | ||
| } | ||
|
|
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| nodeCache.Set(host, node.Node, cache.DefaultExpiration) | ||
|
|
||
| return node.Node, nil | ||
| } |
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