mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-10-01 01:36:09 -04:00
104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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/*
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This package provides an interface to fake a CSP API for QEMU instances.
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*/
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package qemu
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"github.com/edgelesssys/constellation/v2/internal/cloud/metadata"
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)
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const qemuMetadataEndpoint = "10.42.0.1:8080"
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// Cloud provides an interface to fake a CSP API for QEMU instances.
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type Cloud struct{}
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// New returns a new Cloud instance.
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func New() *Cloud {
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return &Cloud{}
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}
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// List retrieves all instances belonging to the current constellation.
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func (c *Cloud) List(ctx context.Context) ([]metadata.InstanceMetadata, error) {
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instancesRaw, err := c.retrieveMetadata(ctx, "/peers")
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if err != nil {
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return nil, err
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}
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var instances []metadata.InstanceMetadata
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err = json.Unmarshal(instancesRaw, &instances)
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return instances, err
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}
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// Self retrieves the current instance.
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func (c *Cloud) Self(ctx context.Context) (metadata.InstanceMetadata, error) {
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instanceRaw, err := c.retrieveMetadata(ctx, "/self")
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if err != nil {
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return metadata.InstanceMetadata{}, err
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}
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var instance metadata.InstanceMetadata
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err = json.Unmarshal(instanceRaw, &instance)
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return instance, err
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}
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// GetLoadBalancerEndpoint returns the endpoint of the load balancer.
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// For QEMU, the load balancer is the first control plane node returned by the metadata API.
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func (c *Cloud) GetLoadBalancerEndpoint(ctx context.Context) (string, error) {
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endpointRaw, err := c.retrieveMetadata(ctx, "/endpoint")
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if err != nil {
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return "", err
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}
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var endpoint string
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err = json.Unmarshal(endpointRaw, &endpoint)
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return endpoint, err
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}
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// InitSecretHash returns the hash of the init secret.
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func (c *Cloud) InitSecretHash(ctx context.Context) ([]byte, error) {
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initSecretHash, err := c.retrieveMetadata(ctx, "/initsecrethash")
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if err != nil {
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return nil, fmt.Errorf("could not retrieve init secret hash: %w", err)
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}
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return initSecretHash, nil
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}
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// UID returns the UID of the constellation.
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func (c *Cloud) UID(_ context.Context) (string, error) {
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// We expect only one constellation to be deployed in the same QEMU / libvirt environment.
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// the UID can be an empty string.
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return "", nil
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}
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func (c *Cloud) retrieveMetadata(ctx context.Context, uri string) ([]byte, error) {
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url := &url.URL{
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Scheme: "http",
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Host: qemuMetadataEndpoint,
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Path: uri,
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, url.String(), nil)
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if err != nil {
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return nil, err
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}
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res, err := (&http.Client{}).Do(req)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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return io.ReadAll(res.Body)
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}
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