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Adds SnapRefreshRPC and node token authentication (#636)
Adds SnapRefreshRPC and node token authentication --------- Co-authored-by: Angelos Kolaitis <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package snapd | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| ) | ||
|
|
||
| var socketPath = "/run/snapd.socket" | ||
|
|
||
| type Client struct { | ||
| client *http.Client | ||
| } | ||
|
|
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| func NewClient() (*Client, error) { | ||
| defaultTransport, ok := http.DefaultTransport.(*http.Transport) | ||
| if !ok { | ||
| return nil, fmt.Errorf("http.DefaultTransport is not a *http.Transport") | ||
| } | ||
|
|
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| unixTransport := defaultTransport.Clone() | ||
| defaultDialContext := unixTransport.DialContext | ||
|
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| unixTransport.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) { | ||
| return defaultDialContext(ctx, "unix", socketPath) | ||
| } | ||
|
|
||
| return &Client{client: &http.Client{Transport: unixTransport}}, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| package snapd | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
|
|
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| "github.com/canonical/k8s/pkg/k8sd/types" | ||
| ) | ||
|
|
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| type snapdChangeResponse struct { | ||
| Result types.RefreshStatus `json:"result"` | ||
| } | ||
|
|
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| func (c *Client) GetRefreshStatus(changeID string) (*types.RefreshStatus, error) { | ||
| resp, err := c.client.Get(fmt.Sprintf("http://localhost/v2/changes/%s", changeID)) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get snapd change status: %w", err) | ||
| } | ||
|
|
||
| resBody, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("client: could not read response body: %s", err) | ||
| } | ||
|
|
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| var changeResponse snapdChangeResponse | ||
| if err := json.Unmarshal(resBody, &changeResponse); err != nil { | ||
| return nil, fmt.Errorf("client: could not unmarshal response body: %s", err) | ||
| } | ||
|
|
||
| return &changeResponse.Result, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "os" | ||
| "strings" | ||
|
|
||
| "github.com/canonical/lxd/lxd/response" | ||
| "github.com/canonical/microcluster/v3/state" | ||
| ) | ||
|
|
||
| func (e *Endpoints) ValidateNodeTokenAccessHandler(tokenHeaderName string) func(s state.State, r *http.Request) (bool, response.Response) { | ||
| return func(s state.State, r *http.Request) (bool, response.Response) { | ||
| token := r.Header.Get(tokenHeaderName) | ||
| if token == "" { | ||
| return false, response.Unauthorized(fmt.Errorf("missing header %q", tokenHeaderName)) | ||
| } | ||
|
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| snap := e.provider.Snap() | ||
|
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| nodeToken, err := os.ReadFile(snap.NodeTokenFile()) | ||
| if err != nil { | ||
| return false, response.InternalError(fmt.Errorf("failed to read node access token: %w", err)) | ||
| } | ||
|
|
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| if strings.TrimSpace(string(nodeToken)) != token { | ||
| return false, response.Unauthorized(fmt.Errorf("invalid token")) | ||
| } | ||
|
|
||
| return true, nil | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
|
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| apiv1 "github.com/canonical/k8s-snap-api/api/v1" | ||
| "github.com/canonical/k8s/pkg/k8sd/types" | ||
| "github.com/canonical/k8s/pkg/utils" | ||
| "github.com/canonical/lxd/lxd/response" | ||
| "github.com/canonical/microcluster/v3/state" | ||
| ) | ||
|
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| func (e *Endpoints) postSnapRefresh(s state.State, r *http.Request) response.Response { | ||
| req := apiv1.SnapRefreshRequest{} | ||
| if err := utils.NewStrictJSONDecoder(r.Body).Decode(&req); err != nil { | ||
| return response.BadRequest(fmt.Errorf("failed to parse request: %w", err)) | ||
| } | ||
|
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| refreshOpts, err := types.RefreshOptsFromAPI(req) | ||
| if err != nil { | ||
| return response.BadRequest(fmt.Errorf("invalid refresh options: %w", err)) | ||
| } | ||
|
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| id, err := e.provider.Snap().Refresh(e.Context(), refreshOpts) | ||
| if err != nil { | ||
| return response.InternalError(fmt.Errorf("failed to refresh snap: %w", err)) | ||
| } | ||
|
|
||
| return response.SyncResponse(true, apiv1.SnapRefreshResponse{ChangeID: id}) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
|
|
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| apiv1 "github.com/canonical/k8s-snap-api/api/v1" | ||
| "github.com/canonical/k8s/pkg/utils" | ||
| "github.com/canonical/lxd/lxd/response" | ||
| "github.com/canonical/microcluster/v3/state" | ||
| ) | ||
|
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| func (e *Endpoints) postSnapRefreshStatus(s state.State, r *http.Request) response.Response { | ||
| req := apiv1.SnapRefreshStatusRequest{} | ||
| if err := utils.NewStrictJSONDecoder(r.Body).Decode(&req); err != nil { | ||
| return response.BadRequest(fmt.Errorf("failed to parse request: %w", err)) | ||
| } | ||
|
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| status, err := e.provider.Snap().RefreshStatus(e.Context(), req.ChangeID) | ||
| if err != nil { | ||
| return response.InternalError(fmt.Errorf("failed to get snap refresh status: %w", err)) | ||
| } | ||
|
|
||
| return response.SyncResponse(true, status.ToAPI()) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| package types | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
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| apiv1 "github.com/canonical/k8s-snap-api/api/v1" | ||
| ) | ||
|
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| // RefreshOpts controls the target version of the snap during a refresh. | ||
| type RefreshOpts struct { | ||
| // LocalPath refreshes the snap using a local snap archive, e.g. "/path/to/k8s.snap". | ||
| LocalPath string `json:"localPath"` | ||
| // Channel refreshes the snap to track a specific channel, e.g. "latest/edge". | ||
| Channel string `json:"channel"` | ||
| // Revision refreshes the snap to a specific revision, e.g. "722". | ||
| Revision string `json:"revision"` | ||
| } | ||
|
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| func RefreshOptsFromAPI(req apiv1.SnapRefreshRequest) (RefreshOpts, error) { | ||
| var optsMap = map[string]string{ | ||
| "localPath": req.LocalPath, | ||
| "channel": req.Channel, | ||
| "revision": req.Revision, | ||
| } | ||
|
|
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| // Make sure only one of the options is set. | ||
| alreadySet := false | ||
| for _, v := range optsMap { | ||
| if alreadySet && v != "" { | ||
| return RefreshOpts{}, fmt.Errorf("only one of localPath, channel or revision can be specified") | ||
| } | ||
| if v != "" { | ||
| alreadySet = true | ||
| } | ||
| } | ||
|
|
||
| switch { | ||
| case req.LocalPath != "": | ||
| return RefreshOpts{LocalPath: req.LocalPath}, nil | ||
| case req.Channel != "": | ||
| return RefreshOpts{Channel: req.Channel}, nil | ||
| case req.Revision != "": | ||
| return RefreshOpts{Revision: req.Revision}, nil | ||
| } | ||
| return RefreshOpts{}, fmt.Errorf("empty snap refresh target") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| package types | ||
|
|
||
| import ( | ||
| apiv1 "github.com/canonical/k8s-snap-api/api/v1" | ||
| ) | ||
|
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| // RefreshStatus represents the status of a snap refresh operation. | ||
| // This is a partial struct derived from the Change struct used by the snapd API. | ||
| type RefreshStatus struct { | ||
| // Status is the current status of the operation. | ||
| Status string `json:"status"` | ||
| // Ready indicates whether the operation has completed. | ||
| Ready bool `json:"ready"` | ||
| // Err contains an error message if the operation failed. | ||
| Err string `json:"err,omitempty"` | ||
| } | ||
|
|
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| func (r RefreshStatus) ToAPI() apiv1.SnapRefreshStatusResponse { | ||
| return apiv1.SnapRefreshStatusResponse{ | ||
| Status: r.Status, | ||
| Completed: r.Ready, | ||
| ErrorMessage: r.Err, | ||
| } | ||
| } |
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