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Provide contract address via http (#2303)
* Add contract-address webserver * add comment * printf
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kind: Deployment | ||
apiVersion: apps/v1 | ||
metadata: | ||
name: contract-address-http | ||
namespace: beacon-chain | ||
labels: | ||
app: beacon-chain | ||
component: contract-address-http | ||
version: v1 | ||
spec: | ||
replicas: 2 | ||
selector: | ||
matchLabels: | ||
app: beacon-chain | ||
component: contract-address-http | ||
version: v1 | ||
template: | ||
metadata: | ||
labels: | ||
app: beacon-chain | ||
component: contract-address-http | ||
version: v1 | ||
spec: | ||
priorityClassName: production-priority | ||
containers: | ||
- name: site | ||
image: gcr.io/prysmaticlabs/prysm/contract-addr:latest | ||
args: | ||
- --address-path=/etc/address/DEPOSIT_CONTRACT_ADDRESS | ||
ports: | ||
- containerPort: 8080 | ||
name: http | ||
volumeMounts: | ||
- name: config-volume | ||
mountPath: /etc/address | ||
volumes: | ||
- name: config-volume | ||
configMap: | ||
name: beacon-config | ||
--- | ||
kind: Service | ||
apiVersion: v1 | ||
metadata: | ||
name: contract-address-http | ||
namespace: beacon-chain | ||
spec: | ||
selector: | ||
app: beacon-chain | ||
component: contract-address-http | ||
ports: | ||
- port: 8080 | ||
targetPort: 8080 | ||
name: http | ||
type: ClusterIP | ||
--- | ||
apiVersion: networking.istio.io/v1alpha3 | ||
kind: VirtualService | ||
metadata: | ||
name: contract-address-http | ||
namespace: istio-system | ||
spec: | ||
hosts: | ||
- beta.prylabs.net | ||
gateways: | ||
- prylabs-wildcard-gateway | ||
http: | ||
- match: | ||
- uri: | ||
prefix: /contract | ||
route: | ||
- destination: | ||
port: | ||
number: 8080 | ||
host: contract-address-http.beacon-chain.svc.cluster.local |
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load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library") | ||
load("@io_bazel_rules_docker//go:image.bzl", "go_image") | ||
load("@io_bazel_rules_docker//container:container.bzl", "container_push") | ||
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go_library( | ||
name = "go_default_library", | ||
srcs = ["main.go"], | ||
importpath = "github.com/prysmaticlabs/prysm/tools/contract-addr", | ||
visibility = ["//visibility:private"], | ||
) | ||
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go_binary( | ||
name = "contract-addr", | ||
embed = [":go_default_library"], | ||
visibility = ["//visibility:public"], | ||
) | ||
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go_image( | ||
name = "image", | ||
srcs = ["main.go"], | ||
importpath = "github.com/prysmaticlabs/prysm/tools/contract-addr", | ||
visibility = ["//visibility:private"], | ||
static = "on", | ||
tags = ["manual"], | ||
goarch = "amd64", | ||
goos = "linux", | ||
deps = [ | ||
], | ||
race = "off", | ||
pure = "on", | ||
) | ||
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container_push( | ||
name = "push_image", | ||
format = "Docker", | ||
image = ":image", | ||
registry = "gcr.io", | ||
repository = "prysmaticlabs/prysm/contract-addr", | ||
tag = "latest", | ||
tags = ["manual"], | ||
visibility = ["//visibility:private"], | ||
) |
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/** | ||
* This tool exists to serve currently configured contract address in k8s. | ||
* It reads the contract address from a plain text file as provided by etcd. | ||
*/ | ||
package main | ||
|
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import ( | ||
"flag" | ||
"fmt" | ||
"io" | ||
"io/ioutil" | ||
"net/http" | ||
) | ||
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var address = flag.String("address-path", "", "The file path to the plain text file with the contract address") | ||
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func main() { | ||
flag.Parse() | ||
if *address == "" { | ||
panic("Contract address filepath not set") | ||
} | ||
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fmt.Println("Starting on port 8080") | ||
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if err := http.ListenAndServe(":8080", &handler{}); err != nil { | ||
panic("Failed to run server: " + err.Error()) | ||
} | ||
} | ||
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type handler struct{} | ||
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func (h *handler) ServeHTTP(w http.ResponseWriter, req *http.Request) { | ||
dat, err := ioutil.ReadFile(*address) | ||
if err != nil { | ||
http.Error(w, err.Error(), http.StatusInternalServerError) | ||
return | ||
} | ||
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_, err = io.WriteString(w, string(dat)) | ||
if err != nil { | ||
fmt.Printf("Failed to write response: %v", err) | ||
} | ||
} |