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AppCred controller support #567
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AppCred controller support #567
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Skipping CI for Draft Pull Request. |
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[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: Deydra71 The full list of commands accepted by this bot can be found here.
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api/v1beta1/keystoneapi.go
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| ) (string, error) { | ||
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| // The name of the Secret containing the service passwords | ||
| const ospSecretName = "osp-secret" |
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We've discussed this - but basically we provide the ability for the operators to specify the secret that contains the admin user password. This is osp-secret by default - but it need not be. See https://github.com/openstack-k8s-operators/barbican-operator/blob/main/api/v1beta1/common_types.go#L44 for instance.
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Agreed, we should not hardcode any value like this. It could be part of the deployment YAML spec.
api/v1beta1/keystoneapi.go
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| return "", fmt.Errorf("failed to get Secret/%s: %w", ospSecretName, err) | ||
| } | ||
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| key := capitalizeFirst(userName) + "Password" |
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This may be a default, but its not what is specified. In barbican, for instance we have a PasswordSelectors field - https://github.com/openstack-k8s-operators/barbican-operator/blob/main/api/v1beta1/common_types.go#L49 which identifies the correct key. But, this needn't be the case.
Ultimately, I think you are going to need to have the AC specification include the name of the user, the name of the user secret and the relevant field. You can set these appropriately in openstack-operator.
| // Always assign these roles: | ||
| Roles: []applicationcredentials.Role{ | ||
| {Name: "admin"}, | ||
| {Name: "service"}, | ||
| }, |
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This makes this controller less generic and therefore potentially less useful. Perhaps this is another parameter - like the access rules that should be passed in as part of the AC spec.
The same can also be said for the Unrestricted field.
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I see there is support for all of Roles, Unrestricted and AccessRules in the gophercloud call - https://pkg.go.dev/github.com/gophercloud/gophercloud/openstack/identity/v3/applicationcredentials#CreateOpts
| } | ||
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| // Otherwise check again in 24 hours | ||
| return defaultRequeue |
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Shouldn't this be return rotateAt ?
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rotateAt is a timestamp, we need return a duration
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OK that makes sense. I (mis)understood this function when I first read it.
So if I understand this correctly now, we should be returning a recheck duration of 24 hours, unless we are already in the grace period - in which case we would be returning a 0 to immediately recheck.
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Yes, that's exactly right
| // default requeue is 24h as minimal grace period is 1 day | ||
| defaultRequeue := 24 * time.Hour | ||
| if ac.Status.ExpiresAt == nil || ac.Status.ExpiresAt.IsZero() { | ||
| return defaultRequeue |
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I'm curious - why would we want to requeue if the application credential does not expire?
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I was thinking about this as an ultimate fallback to wake the controller at least once a day. If because of some error the status of the CR is not updated.
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OK
| return "fallback" // placeholder for generating failure | ||
| } | ||
| s := hex.EncodeToString(b) | ||
| return s[:n] |
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Its unlikely, but should we check for collisions?
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We could check if the AC with same suffix already exists, but unless we are creating millions of AC in short period the chance is basically zero. Or we can increase n.
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should this function be a lib-common utility in the long term?
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| logger := r.GetLogger(ctx) | ||
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| // Only if user explicitly does "oc delete" do we revoke the AC |
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Its actually quite useful, I think, to have the delete revoke the application credential. This gives us a nice way to do a revocation.
The problem is, of course, that there will be some time between when the app cred is revoked and the new one is issued.
I wonder if there is a way to trigger a rotation without doing a delete. Could we implement a reconcileUpdate to do this instead? Then, the procedure when trying to revoke the cert would be to -
- patch the AC so that we are within the grace period. This triggers the creation of a new AC.
- Wait for the new AC to be propagated.
- Revoke the old AC by deleting it.
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I'm just concerned about step 2. - Wait for the new AC to be propagated. Because AC controller would need a feedback that the service deployment successfully rolled out with new credential, which would add another logic to watch the deployment status in AC controller. I’d prefer to leave revocation as a manual step for now.
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I have not finished my initial review, but probably won't have time today to do so. will continue tomorrow, and just wanted to add what I have so far.
| // Decide if we need to create (or rotate) | ||
| needsRotation := false | ||
| if instance.Status.ACID == "" { | ||
| needsRotation = true | ||
| logger.Info("AC does not exist, creating") | ||
| } else if r.shouldRotateNow(instance) { | ||
| needsRotation = true | ||
| logger.Info("AC is within grace period, rotating") | ||
| } |
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lets split this out into a func
| // Check if KeystoneAPI is ready | ||
| keystoneAPI, err := keystonev1.GetKeystoneAPI(ctx, helperObj, instance.Namespace, nil) | ||
| if err != nil { | ||
| logger.Info("KeystoneAPI not found, requeue", "error", err) |
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should set KeystoneAPIReadyCondition
| return ctrl.Result{RequeueAfter: 10 * time.Second}, nil | ||
| } | ||
| if !keystoneAPI.IsReady() { | ||
| logger.Info("KeystoneAPI not ready, requeue") |
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| // Ensure we have an initial ReadyCondition | ||
| condList := condition.CreateList( | ||
| condition.UnknownCondition(condition.ReadyCondition, condition.InitReason, condition.ReadyInitMessage), |
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the ReadyCondition gets auto added in Init.
should init KeystoneAPIReadyCondition and set it when checking for the keystoneapi bellow
condition.UnknownCondition(keystonev1.KeystoneAPIReadyCondition, condition.InitReason, keystonev1.KeystoneAPIReadyInitMessage),
I think we could just use the same condition init as in https://github.com/openstack-k8s-operators/keystone-operator/blob/main/controllers/keystoneendpoint_controller.go#L111-L127 and just init it with what is used in this controller?
| } | ||
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| // Check if KeystoneAPI is ready | ||
| keystoneAPI, err := keystonev1.GetKeystoneAPI(ctx, helperObj, instance.Namespace, nil) |
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https://github.com/openstack-k8s-operators/keystone-operator/blob/main/controllers/keystoneendpoint_controller.go#L134-L165 is an example which sets the conditions
| logger.Info("KeystoneAPI not ready, requeue") | ||
| return ctrl.Result{RequeueAfter: 10 * time.Second}, nil | ||
| } | ||
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mark the KeystoneAPIReadyCondition when we get here, https://github.com/openstack-k8s-operators/keystone-operator/blob/main/controllers/keystoneendpoint_controller.go#L195
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also I'd move all the above tasks into the main reconcile func as these are also the steps done for handling deletion. then you won't need login to check for the keystoneapi in the cleanup method. like https://github.com/openstack-k8s-operators/keystone-operator/blob/main/controllers/keystoneendpoint_controller.go#L225 where the admin client got checked before
| logger := r.GetLogger(ctx) | ||
| adminOS, ctrlResult, err := keystonev1.GetAdminServiceClient(ctx, helperObj, keystoneAPI) | ||
| if err != nil { | ||
| return "", err |
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| if err != nil { | ||
| logger.Error(err, "Failed to find user ID") | ||
| instance.Status.Conditions.Set(condition.FalseCondition( | ||
| condition.ReadyCondition, |
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this seems to be not the correct condition. the ReadyCondition is only set in the defer function based on the sub condition status during the reconcile
| } | ||
| savedConditions := instance.Status.Conditions.DeepCopy() | ||
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| // Defer patch logic (skips if we are deleting) |
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I think we should keep the defer function, like we use in all the controllers https://github.com/openstack-k8s-operators/keystone-operator/blob/main/controllers/keystoneendpoint_controller.go#L91-L109
| keystoneAPI, err := keystonev1.GetKeystoneAPI(ctx, helperObj, instance.Namespace, nil) | ||
| if err == nil && keystoneAPI.IsReady() { | ||
| userID, userErr := r.findUserIDAsAdmin(ctx, helperObj, keystoneAPI, instance.Spec.UserName) | ||
| if userErr == nil { |
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I think we should try to reduce those amount of nested ifs.
what if there is an userErr, which is not "user not found"? is it ok continue and remove the finalizer? shouldn't we return the actual error if it is not "user not found" ?
can't we just do
userID, userErr := r.findUserIDAsAdmin(ctx, helperObj, keystoneAPI, instance.Spec.UserName)
if userErr != nil {
return ctrl.Result{}, err
}
userOS, userRes, userErr2 := keystonev1.GetUserServiceClient(ctx, helperObj, keystoneAPI, instance.Spec.UserName)
...
api/v1beta1/keystoneapi.go
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| ) (string, error) { | ||
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| // The name of the Secret containing the service passwords | ||
| const ospSecretName = "osp-secret" |
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Agreed, we should not hardcode any value like this. It could be part of the deployment YAML spec.
api/v1beta1/keystoneapi.go
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| return "", fmt.Errorf("failed to get Secret/%s: %w", ospSecretName, err) | ||
| } | ||
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| key := capitalizeFirst(userName) + "Password" |
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Why do you need to capitalize the username's first letter? Also, why are you harcoding "Password"?
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This was just to filter user password from osp-secret. Now, passwordSelector will be passed to AC CR, so that will be used for filtering
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I don't get it. Can you elaborate?
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The previous code assumed this password scheme in osp-secret:
BarbicanPassword: <secret_data>
CinderPassword: <secret_data>
GlancePassword: <secret_data>
…
So to pick the right field we had to:
- Take the userName ("barbican")
- Capitalize the first letter → "Barbican"
- Append "Password" → "BarbicanPassword"
and then look up that key in the secret. Of course that'd force everyone to use that convention. So now openstack-operator extracts and passes into AC CR these as well:
spec:
secret: # the Secret name (by default it's osp-secret)
passwordSelector: # how we extract this key, e.g. BarbicanPassword
userName: # e.g. barbican, user can customize this in control plane spec
…
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The latest update makes the controller take into consideration the custom password secret, custom service user name, and password selectors. Continuing to address other reviews. |
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Latest update includes corrections based on some reviews (not all, will still continue), and also adds support for the Currently And also automatic revocation is disabled for now for testing, based on what we will agree it will be enabled again. |
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| scope := &gophercloud.AuthScope{ | ||
| ProjectName: "service", | ||
| DomainName: "Default", | ||
| } |
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I'm very wary about hard-coding stuff here. I think that;
- there may be cases where either the service project or DomainName may be different
- we might be interested in obtaining an app cred for a non-service user or for a different project. For example, I know that there is work ongoing upstream to do manila share encryption where the user would use app creds to retrieve a barbican secret.
In any case, I think it makes sense to make this function more generic - maybe call it GetUserClient() and pass in the domain and project name. You could then add these parameters to the app cred spec, and default to "service" and "Default". This will future-proof the interface a bit.
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I understand, but right now we don't have any spec.ServiceProject or spec.ServiceDomain. So, that's why this serves as a mean to only get scoped token for our service.
Since FR3 is explicitly about wiring up service-account auth, I suggest we leave this helper as is for now, and add a // TODO pointing at the future work to extend the CRD with project/domain fields and refactor into a generic GetUserClient(…, project, domain…)
The domain name is actually hard coded for admin as well - https://github.com/openstack-k8s-operators/keystone-operator/blob/main/api/v1beta1/keystoneapi.go#L157
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there may be cases where either the service project or DomainName may be different
Is this still true if we take into account only service users?
| AuthURL: authURL, | ||
| Username: userName, | ||
| Password: password, | ||
| TenantName: "service", |
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ditto comment as above.
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Merge Failed. This change or one of its cross-repo dependencies was unable to be automatically merged with the current state of its repository. Please rebase the change and upload a new patchset. |
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Based on a discussion with @dprince and @stuggi , we’re putting this PR on hold for now and will revisit after the in-progress go bumps land. At that point, we’ll rebase, re-review, and decide whether it’s worth merging into FR4. Additional reasons:
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| // PasswordSelector for extracting the service password | ||
| // +kubebuilder:validation:Optional | ||
| PasswordSelector string `json:"passwordSelector"` |
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the selector is also required, isn't it?
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I was thinking about this that the PasswordSelector is always provided in the AC CR by openstack-operator, but I just checked that user can set passwordSelector to "" in controlplane CR. Same principle with Secret field as well. I will set it to required in the Keystone AppCred CRD. I just wonder what's the reasoning to not set them as required in the controlplane CRD already? Are there different ways to have service users auth other than using secret + password selectors, that's why we don't enforce it?
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I can not remember why it was not set as required. Right now there is no way
| type KeystoneApplicationCredentialSpec struct { | ||
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| // Secret containing service user password | ||
| // +kubebuilder:validation:Optional |
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looks like this should be required and then have no default?
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| // GracePeriodDays sets how many days before expiration the ApplicationCredential should be rotated | ||
| // +kubebuilder:validation:Optional | ||
| // +kubebuilder:default=182 |
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as discussed on slack, something we need to think about is how would a user know that an edpm deployment is needed to run ?
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Since the EDPM deploy is driven manually right now, maybe we could add a status field or generate event for visibility that EDPM nodes may need updates? And of course document properly how setting the expiration and grace periods affects the EDPM redeploy.
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yes, something like that
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| // Roles to assign to the ApplicationCredential | ||
| // +kubebuilder:validation:Optional | ||
| // +kubebuilder:validation:MinItems=1 |
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is this optional with MinItems=1?
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This is always provided from control plane CR - https://github.com/openstack-k8s-operators/openstack-operator/blob/ca2820b4def81bf3e520e2d035e37cab5722de83/apis/core/v1beta1/openstackcontrolplane_types.go#L906 and https://github.com/openstack-k8s-operators/openstack-operator/blob/ca2820b4def81bf3e520e2d035e37cab5722de83/apis/core/v1beta1/openstackcontrolplane_types.go#L906
We always need at least the service role. But then we should leave the validation:MinItems=1 validation from Keystone CRD, probably, or you think we should set all required parameters to required if someone wants to create CRs manually without the openstack-operator ?
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yes, if the parameters are required, I think we should set them as required.
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| // Unrestricted indicates whether the ApplicationCredential may be used to create or destroy other credentials or trusts | ||
| // +kubebuilder:validation:Optional | ||
| Unrestricted bool `json:"unrestricted,omitempty"` |
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if this is a bool, does optional make sense? should this default to either true/false?
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Keystone defaults to false, unless user specifies differently
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ok, lets default it to false then, to make it more visible ?
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| // AccessRules defines which services the ApplicationCredential is permitted to access | ||
| // +kubebuilder:validation:Optional | ||
| AccessRules []ACRule `json:"accessRules,omitempty"` |
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is this required to be provided, or ok to have no AccessRule for an AppCred?
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They are optional, if not provided the AC will have access based on provided role
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ack, then optional is fine
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Merge Failed. This change or one of its cross-repo dependencies was unable to be automatically merged with the current state of its repository. Please rebase the change and upload a new patchset. |
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Note: We have to add kuttl test in a separate PR, after eventual bump in openstack-operator, as the |
| if instance.Status.SecretName != "" { | ||
| key := types.NamespacedName{Namespace: instance.Namespace, Name: instance.Status.SecretName} | ||
| secret := &corev1.Secret{} | ||
| if err := r.Get(ctx, key, secret); err == nil && controllerutil.ContainsFinalizer(secret, acSecretFinalizer) { |
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In theory we do not need to call controllerutil.ContainsFinalizer as the same check implicitly exists in controllerutil.RemoveFinalizer, so you don't need this in the condition
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Good point, didn't realize that the "contains" check is redundant.
| if err := r.Get(ctx, key, secret); err == nil && controllerutil.ContainsFinalizer(secret, acSecretFinalizer) { | ||
| base := secret.DeepCopy() | ||
| controllerutil.RemoveFinalizer(secret, acSecretFinalizer) | ||
| _ = r.Patch(ctx, secret, client.MergeFrom(base)) |
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should we check a potential error returned from Patch?
| } | ||
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| // Remove finalizer from the AC CR | ||
| if controllerutil.ContainsFinalizer(instance, finalizer) { |
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same here, you can attempt removing the finalizer via controllerutil.RemoveFinalizer as it removes it only if is present.
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| // createACWithName creates a new AC in Keystone | ||
| func (r *ApplicationCredentialReconciler) createACWithName( | ||
| logger logr.Logger, |
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should we get logger like:
logger := r.GetLogger(ctx)
and avoid passing it to the function? we can instead pass ctx context.Context.
| if err := helperObj.GetClient().Get(ctx, key, secret); err != nil { | ||
| return err | ||
| } | ||
| if !controllerutil.ContainsFinalizer(secret, acSecretFinalizer) { |
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same here, you can if controllerutil.AddFinalizer(secret ....) { directly (see [1])
| return "fallback" // placeholder for generating failure | ||
| } | ||
| s := hex.EncodeToString(b) | ||
| return s[:n] |
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should this function be a lib-common utility in the long term?
| return defaultRequeue | ||
| } | ||
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| // needsRotation returns (shouldRotate, logMessage) |
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maybe here we can explain better the returned parameters.
In addition I'm not sure you need both bool and string.
The string seems something that feeds the logger, while the boolean is what you need to process for real as a returned value, right? In any case, I'm not asking to change this function, I was just trying to see it in the picture of the whole flow.
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I added better description of the function. And you are right, the boolean is the return value that drives the logic, and string serves for logging.
| } | ||
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| // getUserIDFromToken extracts the user ID from the authenticated token | ||
| func (r *ApplicationCredentialReconciler) getUserIDFromToken(_ logr.Logger, identClient *gophercloud.ServiceClient, username string) (string, error) { |
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do you need logger here?
docs/applicationcredentials.md
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| // Fetch AC data directly from the Secret | ||
| acData, err := keystonev1.GetApplicationCredentialFromSecret( | ||
| ctx, client, namespace, "barbican") |
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should this be, instead of "barbican", secretName that we got on L190 (and therefore ac-barbican-secret)?
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Merge Failed. This change or one of its cross-repo dependencies was unable to be automatically merged with the current state of its repository. Please rebase the change and upload a new patchset. |
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Signed-off-by: Veronika Fisarova <[email protected]>
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@Deydra71: The following test failed, say
Full PR test history. Your PR dashboard. Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here. |
Jira: OSPRH-14737
This PR introduces a new ApplicationCredential (AC) controller in the keystone-operator. It watches
ApplicationCredentialcustom resources and performs these actions:expirationDaysandgracePeriodDays:Additionally:
KeystoneAPIresource to beReadybefore proceeding with AC operationsNotes:
ApplicationCredentialresource are not automatically installed yet. These must be applied manually until openstack-operator integration is completeTo apply rbac permissions run
oc edit clusterrole keystone-operator-manager-roleand add:Example AC CR for barbican service user: