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up.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file except in compliance with the License.
package up
import (
"context"
"fmt"
"os"
"slices"
"strconv"
"strings"
"time"
"github.com/MakeNowJust/heredoc"
"github.com/dustin/go-humanize"
"github.com/spf13/cobra"
kraftcloud "sdk.kraft.cloud"
kcclient "sdk.kraft.cloud/client"
kcinstances "sdk.kraft.cloud/instances"
kcservices "sdk.kraft.cloud/services"
kcvolumes "sdk.kraft.cloud/volumes"
"kraftkit.sh/cmdfactory"
"kraftkit.sh/compose"
"kraftkit.sh/config"
"kraftkit.sh/internal/cli/kraft/cloud/compose/build"
"kraftkit.sh/internal/cli/kraft/cloud/instance/create"
"kraftkit.sh/internal/cli/kraft/cloud/instance/logs"
"kraftkit.sh/internal/cli/kraft/cloud/instance/start"
"kraftkit.sh/internal/cli/kraft/cloud/utils"
"kraftkit.sh/log"
"kraftkit.sh/packmanager"
)
type UpOptions struct {
Auth *config.AuthConfig `noattribute:"true"`
Client kraftcloud.KraftCloud `noattribute:"true"`
Composefile string `noattribute:"true"`
Detach bool `local:"true" long:"detach" short:"d" usage:"Run the services in the background"`
Metro string `noattribute:"true"`
NoStart bool `noattribute:"true"`
Project *compose.Project `noattribute:"true"`
Token string `noattribute:"true"`
Wait time.Duration `local:"true" long:"wait" short:"w" usage:"Timeout to wait for the instance to start (ms/s/m/h)"`
}
func NewCmd() *cobra.Command {
cmd, err := cmdfactory.New(&UpOptions{}, cobra.Command{
Short: "Deploy services in a compose project to KraftCloud",
Use: "up [FLAGS] [COMPONENT]",
Args: cobra.ArbitraryArgs,
Aliases: []string{"u"},
Long: heredoc.Docf(`
Deploy services in a compose project to KraftCloud
Use an existing %[1]sComposefile%[1]s or %[1]sdocker-compose.yaml%[1]s file to start a
number of services as instances on KraftCloud.
Note that this is an experimental command and not all attributes of the
%[1]sComposefile%[1]s are supported nor are all flags identical.
`, "`"),
Example: heredoc.Doc(`
# Start a KraftCloud deployment fully.
$ kraft cloud compose up
# Start a KraftCloud deployment with two specific components.
$ kraft cloud compose up nginx component
`),
Annotations: map[string]string{
cmdfactory.AnnotationHelpGroup: "kraftcloud-compose",
},
})
if err != nil {
panic(err)
}
return cmd
}
func (opts *UpOptions) Pre(cmd *cobra.Command, args []string) error {
err := utils.PopulateMetroToken(cmd, &opts.Metro, &opts.Token)
if err != nil {
return fmt.Errorf("could not populate metro and token: %w", err)
}
ctx, err := packmanager.WithDefaultUmbrellaManagerInContext(cmd.Context())
if err != nil {
return err
}
cmd.SetContext(ctx)
if cmd.Flag("file").Changed {
opts.Composefile = cmd.Flag("file").Value.String()
}
return nil
}
func (opts *UpOptions) Run(ctx context.Context, args []string) error {
return Up(ctx, opts, args...)
}
func Up(ctx context.Context, opts *UpOptions, args ...string) error {
var err error
if opts.Auth == nil {
opts.Auth, err = config.GetKraftCloudAuthConfig(ctx, opts.Token)
if err != nil {
return fmt.Errorf("could not retrieve credentials: %w", err)
}
}
if opts.Client == nil {
opts.Client = kraftcloud.NewClient(
kraftcloud.WithToken(config.GetKraftCloudTokenAuthConfig(*opts.Auth)),
)
}
if opts.Project == nil {
workdir, err := os.Getwd()
if err != nil {
return err
}
opts.Project, err = compose.NewProjectFromComposeFile(ctx, workdir, opts.Composefile)
if err != nil {
return err
}
}
if err := opts.Project.Validate(ctx); err != nil {
return err
}
// If no services are specified, start all services.
if len(args) == 0 {
for service := range opts.Project.Services {
args = append(args, service)
}
}
// Build all services if the build flag is set.
if err := build.Build(ctx, &build.BuildOptions{
Auth: opts.Auth,
Composefile: opts.Composefile,
Metro: opts.Metro,
Project: opts.Project,
Token: opts.Token,
Push: true,
}, args...); err != nil {
return err
}
// Preemptively create all the service groups from the compose project's
// supplied networks.
svcResps, err := createServiceGroupsFromNetworks(ctx, opts, args...)
if err != nil {
return err
}
volResps, err := createVolumes(ctx, opts)
if err != nil {
return err
}
instResps := kcclient.ServiceResponse[kcinstances.GetResponseItem]{}
for _, serviceName := range args {
service, ok := opts.Project.Services[serviceName]
if !ok {
return fmt.Errorf("service '%s' not found", serviceName)
}
instResp, err := opts.Client.Instances().WithMetro(opts.Metro).Get(ctx, service.Name)
if err == nil && len(instResp.Data.Entries) == 1 && instResp.Data.Entries[0].Error == nil {
instResps.Data.Entries = append(instResps.Data.Entries, instResp.Data.Entries...)
log.G(ctx).WithField("name", service.Name).Info("service already exists")
continue
}
// There is only 1 network per service, so we can safely iterate over the
// networks and break after the first iteration.
var network string
for n := range service.Networks {
network = n
break
}
// Handle environmental variables.
var env []string
for k, v := range service.Environment {
if *v == "" {
env = append(env, fmt.Sprintf("%s=%s", k, os.Getenv(k)))
} else {
env = append(env, fmt.Sprintf("%s=%s", k, *v))
}
}
// Handle the memory limit and reservation. Since these two concepts do not
// currently exist via the KraftCloud API, pick the limit if it is set as it
// represents the maximum value, otherwise check if the reservation has been
// set.
var memory int
if service.MemLimit > 0 {
memory = int(service.MemLimit)
} else if service.MemReservation > 0 {
memory = int(service.MemReservation)
}
if service.Image == "" {
user := strings.TrimSuffix(strings.TrimPrefix(opts.Auth.User, "robot$"), ".users.kraftcloud")
service.Image = fmt.Sprintf(
"index.unikraft.io/%s/%s:latest",
user,
strings.ReplaceAll(service.Name, "_", "-"),
)
}
log.G(ctx).WithField("image", service.Image).Info("deploying")
var serviceGroup string
if data, ok := svcResps[network]; ok {
serviceGroup = data.Data.Entries[0].UUID
}
var volumes []string
for _, volume := range service.Volumes {
vol, ok := volResps[volume.Source]
if !ok {
continue
}
volumes = append(volumes, fmt.Sprintf("%s:%s", vol.Data.Entries[0].UUID, volume.Target))
}
name := service.Name
if cname := service.ContainerName; len(cname) > 0 {
name = cname
}
instResp, _, err = create.Create(ctx, &create.CreateOptions{
Auth: opts.Auth,
Client: opts.Client,
Env: env,
Image: service.Image,
Memory: uint(memory),
Metro: opts.Metro,
Name: name,
ServiceGroupNameOrUUID: serviceGroup,
Start: false,
Token: opts.Token,
WaitForImage: true,
Volumes: volumes,
}, service.Command...)
if err != nil {
return err
}
instResps.Data.Entries = append(instResps.Data.Entries, instResp.Data.Entries...)
}
var instances []string
for _, inst := range instResps.Data.Entries {
instances = append(instances, inst.Name)
}
if !opts.NoStart {
// Start the instances together, separate from the previous create
// invocation.
if err := start.Start(ctx, &start.StartOptions{
Auth: opts.Auth,
Client: opts.Client,
Metro: opts.Metro,
Token: opts.Token,
Wait: opts.Wait,
}, instances...); err != nil {
return fmt.Errorf("starting instances: %w", err)
}
}
if opts.Detach {
return utils.PrintInstances(ctx, "table", instResps)
}
return logs.Logs(ctx, &logs.LogOptions{
Auth: opts.Auth,
Client: opts.Client,
Metro: opts.Metro,
Follow: true,
Tail: -1,
}, instances...)
}
// createVolumes is used to create volumes for each service in the compose
// project. These volumes are used to persist data across instances.
func createVolumes(ctx context.Context, opts *UpOptions) (map[string]*kcclient.ServiceResponse[kcvolumes.GetResponseItem], error) {
volResps := make(map[string]*kcclient.ServiceResponse[kcvolumes.GetResponseItem])
for alias, volume := range opts.Project.Volumes {
name := strings.ReplaceAll(volume.Name, "_", "-")
volResp, err := opts.Client.Volumes().WithMetro(opts.Metro).Get(ctx, name)
if err != nil {
return nil, fmt.Errorf("getting volume: %w", err)
}
vol, err := volResp.FirstOrErr()
if err != nil && vol != nil && *vol.Error == kcclient.APIHTTPErrorNotFound {
log.G(ctx).WithField("name", name).Info("creating volume")
size := 64
if sentry, ok := volume.DriverOpts["size"]; ok {
parsed, err := humanize.ParseBytes(sentry)
if err != nil {
return nil, fmt.Errorf("parsing volume size: %w", err)
}
size = int(parsed) / 1024 / 1024
}
createResp, err := opts.Client.Volumes().WithMetro(opts.Metro).Create(ctx, name, size)
if err != nil {
return nil, fmt.Errorf("creating volume: %w", err)
}
vol, err := createResp.FirstOrErr()
if err != nil {
return nil, err
}
getResp, err := opts.Client.Volumes().WithMetro(opts.Metro).Get(ctx, vol.UUID)
if err != nil {
return nil, fmt.Errorf("creating volume: %w", err)
}
volResps[alias] = getResp
} else if err != nil {
return nil, err
} else {
log.G(ctx).Warnf("volume '%s' already exists as '%s'", volume.Name, name)
volResps[alias] = volResp
}
}
return volResps, nil
}
// createServiceGroupsFromNetworks is used to map each compose service's
// networks to a service group. Since it is not possible to attach an instance
// to multiple service groups it also acts a checking mechanism to determine if
// the compose project's networks are valid with respect to the capabilities of
// the KraftCloud API.
func createServiceGroupsFromNetworks(ctx context.Context, opts *UpOptions, args ...string) (map[string]*kcclient.ServiceResponse[kcservices.GetResponseItem], error) {
svcResps := make(map[string]*kcclient.ServiceResponse[kcservices.GetResponseItem])
// First, create a map of networks which are used by individual services.
// These represent service groups and we'll create them only if they don't
// exist and use the port mapping of the individual service to hydrate the
// create request for the service group.
svcReqs := make(map[string]kcservices.CreateRequest)
for alias, service := range opts.Project.Services {
if !slices.Contains(args, alias) {
continue
}
if len(service.Networks) > 1 {
return nil, fmt.Errorf("service '%s' has more than one network attached which is not supported", alias)
}
for network := range service.Networks {
// Skip the default network, in the situation where a possible alternative
// network can be supplied, we prefer this. Only later if we detect that
// there are no networks associated with any of the services, we'll create
// a service group with the default network.
if network == "default" && len(service.Networks) > 1 {
continue
}
if _, ok := svcReqs[network]; ok {
continue
}
svcReqs[network] = kcservices.CreateRequest{}
}
}
// If none of the compose services are associated with a network, create a new
// service group for the default network.
if len(svcReqs) == 0 {
svcReqs["default"] = kcservices.CreateRequest{}
}
// Check each network to determine whether it exists as a service group.
for alias, network := range opts.Project.Networks {
service, ok := svcReqs[alias]
if !ok {
continue
}
service.Name = ptr(strings.ReplaceAll(network.Name, "_", "-"))
svcReqs[alias] = service
respSvc, err := opts.Client.Services().WithMetro(opts.Metro).Get(ctx, *service.Name)
if err != nil {
return nil, err
}
svc, err := respSvc.FirstOrErr()
if err != nil && *svc.Error == kcclient.APIHTTPErrorNotFound {
continue
} else if err != nil {
return nil, err
}
log.G(ctx).Warnf("network '%s' already exists as a service group '%s'", network.Name, *service.Name)
delete(svcReqs, alias)
svcResps[alias] = respSvc
}
// Iterate through each service and grab the associated port mappings. This
// will be used later to hydrate the service group create request.
for alias, service := range opts.Project.Services {
if !slices.Contains(args, alias) {
continue
}
var services []kcservices.CreateRequestService
for _, port := range service.Ports {
if port.Protocol != "" && port.Protocol != "tls" && port.Protocol != "tcp" {
return nil, fmt.Errorf("protocol '%s' is not supported", port.Protocol)
}
if port.Published == "443" {
services = append(services,
kcservices.CreateRequestService{
Port: 443,
DestinationPort: ptr(int(port.Target)),
Handlers: []kcservices.Handler{
kcservices.HandlerHTTP,
kcservices.HandlerTLS,
},
},
kcservices.CreateRequestService{
Port: 80,
DestinationPort: ptr(int(443)),
Handlers: []kcservices.Handler{
kcservices.HandlerHTTP,
kcservices.HandlerRedirect,
},
},
)
} else {
published, err := strconv.Atoi(port.Published)
if err != nil {
return nil, fmt.Errorf("invalid external port: %w", err)
}
services = append(services,
kcservices.CreateRequestService{
Port: published,
DestinationPort: ptr(int(port.Target)),
Handlers: []kcservices.Handler{
kcservices.HandlerTLS,
},
},
)
}
}
// Expose all ports (services) to networks (service groups).
for alias, req := range svcReqs {
req.Services = append(req.Services, services...)
if len(service.DomainName) > 0 {
// If the domain contains a period, it is a fully qualified domain name,
// which means we should append a period to the end of the domain name
// to ensure it is a valid domain name for the KraftCloud API.
if strings.Contains(service.DomainName, ".") {
service.DomainName += "."
}
req.Domains = []kcservices.CreateRequestDomain{{
Name: service.DomainName,
}}
}
svcReqs[alias] = req
}
}
// Create all service groups.
for alias, req := range svcReqs {
if len(req.Services) == 0 {
log.G(ctx).
WithField("network", alias).
Warn("no exposed ports: skipping service group creation")
continue
}
log.G(ctx).WithField("network", *req.Name).Info("creating service group")
createResp, err := opts.Client.Services().WithMetro(opts.Metro).Create(ctx, req)
if err != nil {
return nil, fmt.Errorf("creating service group: %w", err)
}
svc, err := createResp.FirstOrErr()
if err != nil {
return nil, err
}
getResp, err := opts.Client.Services().WithMetro(opts.Metro).Get(ctx, svc.UUID)
if err != nil {
return nil, fmt.Errorf("creating service group: %w", err)
}
svcResps[alias] = getResp
}
return svcResps, nil
}
func ptr[T comparable](v T) *T { return &v }