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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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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.
stuggi
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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.
| secretName := fmt.Sprintf("%s-secret", instance.Name) | ||
| if err := r.storeACSecret(ctx, helperObj, instance, secretName, newID, newSecret); err != nil { | ||
| return ctrl.Result{}, err | ||
| } |
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The keystone-operator is somewhat unique in the operators in that there isn't a lot of documentation of what it does. Just looking at the code , for instance, it wasn't completely clear to me what the name of the ac would be, and the name of the secret etc. I'm sure I could figure it out - but I shouldn't have to work so hard.
It would be great if there were a small doc (maybe in a docs directory like the other operators) which contains a description of what we'd expect this operator to produce. It doesn't have to be fancy, but it will help future reviewers and coders who want to enhance this feature.
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I added the doc dir and a new file describing basic functionality of the AC controller - will add more details soon.
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Build failed (check pipeline). Post https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/179a05bbe7c94c938c402967d4766f8f ❌ openstack-k8s-operators-content-provider FAILURE in 12m 20s |
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why does this have do-not-merge label? |
Thanks, it was a remnant when stuff fro FR4 were getting merged |
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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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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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…r functions for service operators. Signed-off-by: Veronika Fisarova <[email protected]>
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Build failed (check pipeline). Post https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/be4da1f98b18431ebbffeb9f6b27f75b ❌ openstack-k8s-operators-content-provider FAILURE in 6m 45s |
| ProjectName: "service", | ||
| DomainName: "Default", |
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I don't know the details for keystone related to Domains, therefore maybe a bad question. In a multi region setup, would it still be the default Domain?
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Yes, still Default domain. Domain is a global concept iin Keystone, and in the SKMO design the user uniqueness is achieved by unique usernames (nova-region1, nova-region2...). Also the domain is hardcoded to default across controlplane and not configurable atm (except for heat_stack_domain_admin, but we are not creating AppCred for this user because it's domain-based, and KEystone doesn't allow to create AppCred for domain-based users, only project-scoped, or unscoped).
| if ospSecretName == "" { | ||
| return "", ctrl.Result{}, fmt.Errorf("secret name is empty, cannot retrieve password for selector %q", passwordSelector) | ||
| } | ||
| if passwordSelector == "" { | ||
| return "", ctrl.Result{}, fmt.Errorf("password selector is empty, cannot retrieve password from secret %q", ospSecretName) |
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It won't hurt, but in theory we should never hit that since afaik they either have a default or are required fields.
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see my comment on the keystoneapplicationcredential_types.go would that remove the need for these checks here?
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Yes, agree, will add the kube validations for PasswordSelector and Secret fields.
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| // PasswordSelector for extracting the service password | ||
| // +kubebuilder:validation:Optional | ||
| PasswordSelector string `json:"passwordSelector"` |
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I think we could add // +kubebuilder:validation:MinLength=1 to not allow empty string "". this would remove the need for checking for the empty things in the funcs above.
| // +kubebuilder:validation:Optional | ||
| // +kubebuilder:default=365 | ||
| // +kubebuilder:validation:Minimum=2 | ||
| ExpirationDays int `json:"expirationDays"` |
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what should be the right value for an edpm service, like nova-compute. do they need a dedicated credential which expires really long in the future?
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The expirationDays and gracePeriodDays have global defaults, but both are configurable per service in the controlplane CR, so each service user can be configured differently. I think we should keep the decision about the expiration of AppCred that affects EDPM on the cluster admin - with a documentation note that they should set expiration and grace periods based on their case.
Also when the AppCred rotates, the controller emits a kube Event that this credential was rotated, when it expires, and that it may affect EDPM redeploy. User will also see right away in status fields the last rotated and expiration timestamps to be aware of that:
status:
createdAt: "2025-12-05T10:00:00Z"
expiresAt: "2026-12-05T10:00:00Z"
lastRotated: "2025-12-05T10:00:00Z"
rotationEligibleAt: "2026-06-05T10:00:00Z" # expiresAt - gracePeriod
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right, they could see it there, if they check those status. I think we'd have to highlight this with a big note in the edpm deployment step as I am just not sure if 365 days with GracePeriodDays 182 is ok for really big envs and that they'd have to customize it if needed. Or maybe it is just me :)
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| // VerifySecret returns res.RequeueAfter > 0 when secret not found (not an error) | ||
| // For AC, this is optional, so we just skip it instead of requeueing | ||
| if res.RequeueAfter > 0 { |
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what happens if you'd call secret.VerifySecret with a 0 timeout.
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That's a really good catch I didn't notice... With the current sctructure passing timeout equal to 0 breaks the logic if the secret is not found, which means that verifySecret returns res == ctrl.Result{RequeueAfter: timeout} we skip the res.RequeueAfter > 0 check, so we end up with empty hash. We can change it to:
if hash == "" {
// AC secret not found - this is OK, service will use password auth
return ctrl.Result{}, nil
}
And not rely on the requeue value returned. Does it make sense?
| // Setup helper for use in reconciles | ||
| helperObj, err := helper.NewHelper(instance, r.Client, r.Kclient, r.Scheme, logger) | ||
| if err != nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
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| // Save and defer patching all subconditions and overall Ready | ||
| saved := instance.Status.Conditions.DeepCopy() | ||
| defer func() { | ||
| if instance.DeletionTimestamp.IsZero() { | ||
| condition.RestoreLastTransitionTimes(&instance.Status.Conditions, saved) | ||
| // ApplicationCredentialReady being True implies KeystoneAPIReady is True, | ||
| // so when ApplicationCredential is ready, setup is complete | ||
| if instance.Status.Conditions.IsTrue(keystonev1.KeystoneApplicationCredentialReadyCondition) { | ||
| instance.Status.Conditions.MarkTrue(condition.ReadyCondition, keystonev1.KeystoneApplicationCredentialReadyMessage) | ||
| } else { | ||
| instance.Status.Conditions.MarkUnknown(condition.ReadyCondition, condition.InitReason, condition.ReadyInitMessage) | ||
| instance.Status.Conditions.Set(instance.Status.Conditions.Mirror(condition.ReadyCondition)) | ||
| } | ||
| _ = helperObj.PatchInstance(ctx, instance) | ||
| } | ||
| }() |
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see my comment above on the reordering
| instance *keystonev1.KeystoneApplicationCredential, | ||
| ) (ctrl.Result, error) { | ||
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| // Before removing our CR finalizer, allow ApplicationCredential Secret to be deleted by removing its protection finalizer |
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don't we first have to clean it up in keystone by doing an keystoneapi call, similar to how we do it in the keustoneendpoint https://github.com/openstack-k8s-operators/keystone-operator/blob/main/internal/controller/keystoneendpoint_controller.go#L255 ? otherwise we end up in the AC still be there in keystone? or is there some automatic cleanup in keystone and we just let it expire?
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| createOpts := applicationcredentials.CreateOpts{ | ||
| Name: newACName, | ||
| Description: fmt.Sprintf("Created by keystone-operator for user %s", ac.Spec.UserName), |
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should this have the owning object name as a reference?
| "AC_ID": newID, | ||
| "AC_SECRET": newSecret, |
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maybe the keys should be const? can then be used in the other places.
| } | ||
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| instance.Status.Conditions.MarkTrue(keystonev1.KeystoneApplicationCredentialReadyCondition, keystonev1.KeystoneApplicationCredentialReadyMessage) | ||
| nextCheck := r.computeNextRequeue(instance) |
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do we need this if the min ExpirationDays is 2 days? per default SyncPeriod, the operators reconcile is every 10 or 12h. is cert-manager doing something like this?
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: