`MCS` will authenticate against `Mkube`using bearer tokens via HTTP
`Authorization` header. The user will provide this token once
in the login form, MCS will validate it against Mkube (list tenants) and
if valid will generate and return a new MCS sessions
with encrypted claims (the user Service account token will be inside the
JWT in the data field)
Kubernetes
The provided `JWT token` corresponds to the `Kubernetes service account`
that `Mkube` will use to run tasks on behalf of the
user, ie: list, create, edit, delete tenants, storage class, etc.
Development
If you are running mcs in your local environment and wish to make
request to `Mkube` you can set `MCS_M3_HOSTNAME`, if
the environment variable is not present by default `MCS` will use
`"http://m3:8787"`, additionally you will need to set the
`MCS_MKUBE_ADMIN_ONLY=on` variable to make MCS display the Mkube UI
Extract the Service account token and use it with MCS
For local development you can use the jwt associated to the `m3-sa`
service account, you can get the token running
the following command in your terminal:
```
kubectl get secret $(kubectl get serviceaccount m3-sa -o
jsonpath="{.secrets[0].name}") -o jsonpath="{.data.token}" | base64
--decode
```
Then run the mcs server
```
MCS_M3_HOSTNAME=http://localhost:8787 MCS_MKUBE_ADMIN_ONLY=on ./mcs
server
```
Self-signed certificates and Custom certificate authority for Mkube
If Mkube uses TLS with a self-signed certificate, or a certificate
issued by a custom certificate authority you can add those
certificates usinng the `MCS_M3_SERVER_TLS_CA_CERTIFICATE` env variable
````
MCS_M3_SERVER_TLS_CA_CERTIFICATE=cert1.pem,cert2.pem,cert3.pem ./mcs
server
````
This PR sets the initial version of the ACL for mcs, the idea behind
this is to start using the principle of least privileges when assigning
policies to users when creating users through mcs, currently mcsAdmin policy uses admin:*
and s3:* and by default a user with that policy will have access to everything, if want to limit
that we can create a policy with least privileges.
We need to start validating explicitly if users has acccess to an
specific endpoint based on IAM policy actions.
In this first version every endpoint (you can see it as a page to),
defines a set of well defined admin/s3 actions to work properly, ie:
```
// corresponds to /groups endpoint used by the groups page
var groupsActionSet = iampolicy.NewActionSet(
iampolicy.ListGroupsAdminAction,
iampolicy.AddUserToGroupAdminAction,
//iampolicy.GetGroupAdminAction,
iampolicy.EnableGroupAdminAction,
iampolicy.DisableGroupAdminAction,
)
// corresponds to /policies endpoint used by the policies page
var iamPoliciesActionSet = iampolicy.NewActionSet(
iampolicy.GetPolicyAdminAction,
iampolicy.DeletePolicyAdminAction,
iampolicy.CreatePolicyAdminAction,
iampolicy.AttachPolicyAdminAction,
iampolicy.ListUserPoliciesAdminAction,
)
```
With that said, for this initial version, now the sessions endpoint will
return a list of authorized pages to be render on the UI, on subsequent
prs we will add this verification of authorization via a server
middleware.
