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services.go
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services.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1
package taskenv
import (
"github.com/hashicorp/nomad/nomad/structs"
)
// InterpolateServices returns an interpolated copy of services and checks with
// values from the task's environment.
func InterpolateServices(taskEnv *TaskEnv, services []*structs.Service) []*structs.Service {
// Guard against not having a valid taskEnv. This can be the case if the
// PreKilling or Exited hook is run before Poststart.
if taskEnv == nil || len(services) == 0 {
return nil
}
interpolated := make([]*structs.Service, len(services))
for i, service := range services {
interpolated[i] = InterpolateService(taskEnv, service)
}
return interpolated
}
func InterpolateService(taskEnv *TaskEnv, origService *structs.Service) *structs.Service {
// Guard against not having a valid taskEnv. This can be the case if the
// PreKilling or Exited hook is run before Poststart.
if taskEnv == nil || origService == nil {
return nil
}
// Create a copy as we need to re-interpolate every time the
// environment changes.
service := origService.Copy()
for _, check := range service.Checks {
check.Name = taskEnv.ReplaceEnv(check.Name)
check.Type = taskEnv.ReplaceEnv(check.Type)
check.Command = taskEnv.ReplaceEnv(check.Command)
check.Args = taskEnv.ParseAndReplace(check.Args)
check.Path = taskEnv.ReplaceEnv(check.Path)
check.Protocol = taskEnv.ReplaceEnv(check.Protocol)
check.PortLabel = taskEnv.ReplaceEnv(check.PortLabel)
check.InitialStatus = taskEnv.ReplaceEnv(check.InitialStatus)
check.Notes = taskEnv.ReplaceEnv(check.Notes)
check.Method = taskEnv.ReplaceEnv(check.Method)
check.GRPCService = taskEnv.ReplaceEnv(check.GRPCService)
check.Header = interpolateMapStringSliceString(taskEnv, check.Header)
}
service.Name = taskEnv.ReplaceEnv(service.Name)
service.PortLabel = taskEnv.ReplaceEnv(service.PortLabel)
service.Address = taskEnv.ReplaceEnv(service.Address)
service.Tags = taskEnv.ParseAndReplace(service.Tags)
service.CanaryTags = taskEnv.ParseAndReplace(service.CanaryTags)
service.Meta = interpolateMapStringString(taskEnv, service.Meta)
service.CanaryMeta = interpolateMapStringString(taskEnv, service.CanaryMeta)
service.TaggedAddresses = interpolateMapStringString(taskEnv, service.TaggedAddresses)
interpolateConnect(taskEnv, service.Connect)
return service
}
func interpolateMapStringSliceString(taskEnv *TaskEnv, orig map[string][]string) map[string][]string {
if len(orig) == 0 {
return nil
}
m := make(map[string][]string, len(orig))
for k, vs := range orig {
m[taskEnv.ReplaceEnv(k)] = taskEnv.ParseAndReplace(vs)
}
return m
}
func interpolateMapStringString(taskEnv *TaskEnv, orig map[string]string) map[string]string {
if len(orig) == 0 {
return nil
}
m := make(map[string]string, len(orig))
for k, v := range orig {
m[taskEnv.ReplaceEnv(k)] = taskEnv.ReplaceEnv(v)
}
return m
}
func interpolateMapStringInterface(taskEnv *TaskEnv, orig map[string]any) map[string]any {
if len(orig) == 0 {
return nil
}
m := make(map[string]any, len(orig))
for k, v := range orig {
envK := taskEnv.ReplaceEnv(k)
if vStr, ok := v.(string); ok {
m[envK] = taskEnv.ReplaceEnv(vStr)
} else {
m[envK] = v
}
}
return m
}
func interpolateConnect(taskEnv *TaskEnv, connect *structs.ConsulConnect) {
if connect == nil {
return
}
interpolateConnectSidecarService(taskEnv, connect.SidecarService)
interpolateConnectSidecarTask(taskEnv, connect.SidecarTask)
if connect.Gateway != nil {
interpolateConnectGatewayProxy(taskEnv, connect.Gateway.Proxy)
interpolateConnectGatewayIngress(taskEnv, connect.Gateway.Ingress)
}
}
func interpolateConnectGatewayProxy(taskEnv *TaskEnv, proxy *structs.ConsulGatewayProxy) {
if proxy == nil {
return
}
m := make(map[string]*structs.ConsulGatewayBindAddress, len(proxy.EnvoyGatewayBindAddresses))
for k, v := range proxy.EnvoyGatewayBindAddresses {
m[taskEnv.ReplaceEnv(k)] = &structs.ConsulGatewayBindAddress{
Address: taskEnv.ReplaceEnv(v.Address),
Port: v.Port,
}
}
proxy.EnvoyGatewayBindAddresses = m
proxy.Config = interpolateMapStringInterface(taskEnv, proxy.Config)
}
func interpolateConnectGatewayIngress(taskEnv *TaskEnv, ingress *structs.ConsulIngressConfigEntry) {
if ingress == nil {
return
}
for _, listener := range ingress.Listeners {
listener.Protocol = taskEnv.ReplaceEnv(listener.Protocol)
for _, service := range listener.Services {
service.Name = taskEnv.ReplaceEnv(service.Name)
service.Hosts = taskEnv.ParseAndReplace(service.Hosts)
}
}
}
func interpolateConnectSidecarService(taskEnv *TaskEnv, sidecar *structs.ConsulSidecarService) {
if sidecar == nil {
return
}
sidecar.Port = taskEnv.ReplaceEnv(sidecar.Port)
sidecar.Tags = taskEnv.ParseAndReplace(sidecar.Tags)
if sidecar.Proxy != nil {
sidecar.Proxy.LocalServiceAddress = taskEnv.ReplaceEnv(sidecar.Proxy.LocalServiceAddress)
if sidecar.Proxy.Expose != nil {
for i := 0; i < len(sidecar.Proxy.Expose.Paths); i++ {
sidecar.Proxy.Expose.Paths[i].Protocol = taskEnv.ReplaceEnv(sidecar.Proxy.Expose.Paths[i].Protocol)
sidecar.Proxy.Expose.Paths[i].ListenerPort = taskEnv.ReplaceEnv(sidecar.Proxy.Expose.Paths[i].ListenerPort)
sidecar.Proxy.Expose.Paths[i].Path = taskEnv.ReplaceEnv(sidecar.Proxy.Expose.Paths[i].Path)
}
}
for i := 0; i < len(sidecar.Proxy.Upstreams); i++ {
sidecar.Proxy.Upstreams[i].Datacenter = taskEnv.ReplaceEnv(sidecar.Proxy.Upstreams[i].Datacenter)
sidecar.Proxy.Upstreams[i].DestinationName = taskEnv.ReplaceEnv(sidecar.Proxy.Upstreams[i].DestinationName)
sidecar.Proxy.Upstreams[i].LocalBindAddress = taskEnv.ReplaceEnv(sidecar.Proxy.Upstreams[i].LocalBindAddress)
sidecar.Proxy.Upstreams[i].Config = interpolateMapStringInterface(taskEnv, sidecar.Proxy.Upstreams[i].Config)
}
sidecar.Proxy.Config = interpolateMapStringInterface(taskEnv, sidecar.Proxy.Config)
}
}
func interpolateConnectSidecarTask(taskEnv *TaskEnv, task *structs.SidecarTask) {
if task == nil {
return
}
task.Driver = taskEnv.ReplaceEnv(task.Driver)
task.Config = interpolateMapStringInterface(taskEnv, task.Config)
task.Env = interpolateMapStringString(taskEnv, task.Env)
task.KillSignal = taskEnv.ReplaceEnv(task.KillSignal)
task.Meta = interpolateMapStringString(taskEnv, task.Meta)
interpolateTaskResources(taskEnv, task.Resources)
task.User = taskEnv.ReplaceEnv(task.User)
}
func interpolateTaskResources(taskEnv *TaskEnv, resources *structs.Resources) {
if resources == nil {
return
}
for i := 0; i < len(resources.Devices); i++ {
resources.Devices[i].Name = taskEnv.ReplaceEnv(resources.Devices[i].Name)
// do not interpolate constraints & affinities
}
for i := 0; i < len(resources.Networks); i++ {
resources.Networks[i].CIDR = taskEnv.ReplaceEnv(resources.Networks[i].CIDR)
resources.Networks[i].Device = taskEnv.ReplaceEnv(resources.Networks[i].Device)
resources.Networks[i].IP = taskEnv.ReplaceEnv(resources.Networks[i].IP)
resources.Networks[i].Mode = taskEnv.ReplaceEnv(resources.Networks[i].Mode)
if resources.Networks[i].DNS != nil {
resources.Networks[i].DNS.Options = taskEnv.ParseAndReplace(resources.Networks[i].DNS.Options)
resources.Networks[i].DNS.Searches = taskEnv.ParseAndReplace(resources.Networks[i].DNS.Searches)
resources.Networks[i].DNS.Servers = taskEnv.ParseAndReplace(resources.Networks[i].DNS.Servers)
}
for p := 0; p < len(resources.Networks[i].DynamicPorts); p++ {
resources.Networks[i].DynamicPorts[p].HostNetwork = taskEnv.ReplaceEnv(resources.Networks[i].DynamicPorts[p].HostNetwork)
resources.Networks[i].DynamicPorts[p].Label = taskEnv.ReplaceEnv(resources.Networks[i].DynamicPorts[p].Label)
}
for p := 0; p < len(resources.Networks[i].ReservedPorts); p++ {
resources.Networks[i].ReservedPorts[p].HostNetwork = taskEnv.ReplaceEnv(resources.Networks[i].ReservedPorts[p].HostNetwork)
resources.Networks[i].ReservedPorts[p].Label = taskEnv.ReplaceEnv(resources.Networks[i].ReservedPorts[p].Label)
}
}
}
// InterpolateWIHandle returns a copy of the WIHandle with only the
// InterpolatedWorkloadIdentifier field interpolated. The original
// WorkloadIdentifier should never be altered so the server can find
// uninterpolated services associated with the handle.
func InterpolateWIHandle(taskEnv *TaskEnv, orig structs.WIHandle) structs.WIHandle {
return structs.WIHandle{
IdentityName: orig.IdentityName,
WorkloadIdentifier: orig.WorkloadIdentifier,
WorkloadType: orig.WorkloadType,
InterpolatedWorkloadIdentifier: taskEnv.ReplaceEnv(orig.WorkloadIdentifier),
}
}