https://github.com/argoproj/argo-cd
Tip revision: b01ac63204b6f10fd7564aac6ae73df46a4a178e authored by jannfis on 28 March 2022, 10:58:38 UTC
fix: Remove invalid setting from cherry-pick
fix: Remove invalid setting from cherry-pick
Tip revision: b01ac63
index.md
# Overview
Once installed Argo CD has one built-in `admin` user that has full access to the system. It is recommended to use `admin` user only
for initial configuration and then switch to local users or configure SSO integration.
## Local users/accounts (v1.5)
The local users/accounts feature serves two main use-cases:
* Auth tokens for Argo CD management automation. It is possible to configure an API account with limited permissions and generate an authentication token.
Such token can be used to automatically create applications, projects etc.
* Additional users for a very small team where use of SSO integration might be considered an overkill. The local users don't provide advanced features such as groups,
login history etc. So if you need such features it is strongly recommended to use SSO.
!!! note
When you create local users, each of those users will need additional [RBAC rules](../rbac.md) set up, otherwise they will fall back to the default policy specified by `policy.default` field of the `argocd-rbac-cm` ConfigMap.
The maximum length of a local account's username is 32.
### Create new user
New users should be defined in `argocd-cm` ConfigMap:
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: argocd-cm
namespace: argocd
labels:
app.kubernetes.io/name: argocd-cm
app.kubernetes.io/part-of: argocd
data:
# add an additional local user with apiKey and login capabilities
# apiKey - allows generating API keys
# login - allows to login using UI
accounts.alice: apiKey, login
# disables user. User is enabled by default
accounts.alice.enabled: "false"
```
Each user might have two capabilities:
* apiKey - allows generating authentication tokens for API access
* login - allows to login using UI
### Disable admin user
As soon as additional users are created it is recommended to disable `admin` user:
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: argocd-cm
namespace: argocd
labels:
app.kubernetes.io/name: argocd-cm
app.kubernetes.io/part-of: argocd
data:
admin.enabled: "false"
```
### Manage users
The Argo CD CLI provides set of commands to set user password and generate tokens.
* Get full users list
```bash
argocd account list
```
* Get specific user details
```bash
argocd account get --account <username>
```
* Set user password
```bash
# if you are managing users as the admin user, <current-user-password> should be the current admin password.
argocd account update-password \
--account <name> \
--current-password <current-user-password> \
--new-password <new-user-password>
```
* Generate auth token
```bash
# if flag --account is omitted then Argo CD generates token for current user
argocd account generate-token --account <username>
```
### Failed logins rate limiting
Argo CD rejects login attempts after too many failed in order to prevent password brute-forcing.
The following environments variables are available to control throttling settings:
* `ARGOCD_SESSION_MAX_FAIL_COUNT`: Maximum number of failed logins before Argo CD starts
rejecting login attempts. Default: 5.
* `ARGOCD_SESSION_FAILURE_WINDOW_SECONDS`: Number of seconds for the failure window.
Default: 300 (5 minutes). If this is set to 0, the failure window is
disabled and the login attempts gets rejected after 10 consecutive logon failures,
regardless of the time frame they happened.
* `ARGOCD_SESSION_MAX_CACHE_SIZE`: Maximum number of entries allowed in the
cache. Default: 1000
* `ARGOCD_MAX_CONCURRENT_LOGIN_REQUESTS_COUNT`: Limits max number of concurrent login requests.
If set to 0 then limit is disabled. Default: 50.
## SSO
There are two ways that SSO can be configured:
* [Bundled Dex OIDC provider](#dex) - use this option if your current provider does not support OIDC (e.g. SAML,
LDAP) or if you wish to leverage any of Dex's connector features (e.g. the ability to map GitHub
organizations and teams to OIDC groups claims). Dex also supports OIDC directly and can fetch user
information from the identity provider when the groups cannot be included in the IDToken.
* [Existing OIDC provider](#existing-oidc-provider) - use this if you already have an OIDC provider which you are using (e.g.
[Okta](okta.md), [OneLogin](onelogin.md), [Auth0](auth0.md), [Microsoft](microsoft.md), [Keycloak](keycloak.md),
[Google (G Suite)](google.md)), where you manage your users, groups, and memberships.
## Dex
Argo CD embeds and bundles [Dex](https://github.com/dexidp/dex) as part of its installation, for the
purpose of delegating authentication to an external identity provider. Multiple types of identity
providers are supported (OIDC, SAML, LDAP, GitHub, etc...). SSO configuration of Argo CD requires
editing the `argocd-cm` ConfigMap with
[Dex connector](https://dexidp.io/docs/connectors/) settings.
This document describes how to configure Argo CD SSO using GitHub (OAuth2) as an example, but the
steps should be similar for other identity providers.
### 1. Register the application in the identity provider
In GitHub, register a new application. The callback address should be the `/api/dex/callback`
endpoint of your Argo CD URL (e.g. `https://argocd.example.com/api/dex/callback`).
![Register OAuth App](../../assets/register-app.png "Register OAuth App")
After registering the app, you will receive an OAuth2 client ID and secret. These values will be
inputted into the Argo CD configmap.
![OAuth2 Client Config](../../assets/oauth2-config.png "OAuth2 Client Config")
### 2. Configure Argo CD for SSO
Edit the argocd-cm configmap:
```bash
kubectl edit configmap argocd-cm -n argocd
```
* In the `url` key, input the base URL of Argo CD. In this example, it is `https://argocd.example.com`
* In the `dex.config` key, add the `github` connector to the `connectors` sub field. See Dex's
[GitHub connector](https://github.com/dexidp/website/blob/main/content/docs/connectors/github.md)
documentation for explanation of the fields. A minimal config should populate the clientID,
clientSecret generated in Step 1.
* You will very likely want to restrict logins to one or more GitHub organization. In the
`connectors.config.orgs` list, add one or more GitHub organizations. Any member of the org will
then be able to login to Argo CD to perform management tasks.
```yaml
data:
url: https://argocd.example.com
dex.config: |
connectors:
# GitHub example
- type: github
id: github
name: GitHub
config:
clientID: aabbccddeeff00112233
clientSecret: $dex.github.clientSecret # Alternatively $<some_K8S_secret>:dex.github.clientSecret
orgs:
- name: your-github-org
# GitHub enterprise example
- type: github
id: acme-github
name: Acme GitHub
config:
hostName: github.acme.com
clientID: abcdefghijklmnopqrst
clientSecret: $dex.acme.clientSecret # Alternatively $<some_K8S_secret>:dex.acme.clientSecret
orgs:
- name: your-github-org
```
After saving, the changes should take affect automatically.
NOTES:
* There is no need to set `redirectURI` in the `connectors.config` as shown in the dex documentation.
Argo CD will automatically use the correct `redirectURI` for any OAuth2 connectors, to match the
correct external callback URL (e.g. `https://argocd.example.com/api/dex/callback`)
## OIDC Configuration with DEX
Dex can be used for OIDC authentication instead of ArgoCD directly. This provides a separate set of
features such as fetching information from the `UserInfo` endpoint and
[federated tokens](https://dexidp.io/docs/custom-scopes-claims-clients/#cross-client-trust-and-authorized-party)
### Configuration:
* In the `argocd-cm` ConfigMap add the `OIDC` connector to the `connectors` sub field inside `dex.config`.
See Dex's [OIDC connect documentation](https://dexidp.io/docs/connectors/oidc/) to see what other
configuration options might be useful. We're going to be using a minimal configuration here.
* The issuer URL should be where Dex talks to the OIDC provider. There would normally be a
`.well-known/openid-configuration` under this URL which has information about what the provider supports.
e.g. https://accounts.google.com/.well-known/openid-configuration
```yaml
data:
url: "https://argocd.example.com"
dex.config: |
connectors:
# OIDC
- type: OIDC
id: oidc
name: OIDC
issuer: https://example-OIDC-provider.com
clientID: aaaabbbbccccddddeee
clientSecret: $dex.oidc.clientSecret
```
### Requesting additional ID token claims
By default Dex only retrieves the profile and email scopes. In order to retrieve more more claims you
can add them under the `scopes` entry in the Dex configuration. To enable group claims through Dex,
`insecureEnableGroups` also needs to enabled. Group information is currently only refreshed at authentication
time and support to refresh group information more dynamically can be tracked here: [dexidp/dex#1065](https://github.com/dexidp/dex/issues/1065).
```yaml
data:
url: "https://argocd.example.com"
dex.config: |
connectors:
# OIDC
- type: OIDC
id: oidc
name: OIDC
issuer: https://example-OIDC-provider.com
clientID: aaaabbbbccccddddeee
clientSecret: $dex.oidc.clientSecret
insecureEnableGroups: true
scopes:
- profile
- email
- groups
```
!!! warning
Because group information is only refreshed at authentication time just adding or removing an account from a group will not change a user's membership until they reauthenticate. Depending on your organization's needs this could be a security risk and could be mitigated by changing the authentication token's lifetime.
### Retrieving claims that are not in the token
When an Idp does not or cannot support certain claims in an IDToken they can be retrieved separately using
the UserInfo endpoint. Dex supports this functionality using the `getUserInfo` endpoint. One of the most
common claims that is not supported in the IDToken is the `groups` claim and both `getUserInfo` and `insecureEnableGroups`
must be set to true.
```yaml
data:
url: "https://argocd.example.com"
dex.config: |
connectors:
# OIDC
- type: OIDC
id: oidc
name: OIDC
issuer: https://example-OIDC-provider.com
clientID: aaaabbbbccccddddeee
clientSecret: $dex.oidc.clientSecret
insecureEnableGroups: true
scopes:
- profile
- email
- groups
getUserInfo: true
```
## Existing OIDC Provider
To configure Argo CD to delegate authenticate to your existing OIDC provider, add the OAuth2
configuration to the `argocd-cm` ConfigMap under the `oidc.config` key:
```yaml
data:
url: https://argocd.example.com
oidc.config: |
name: Okta
issuer: https://dev-123456.oktapreview.com
clientID: aaaabbbbccccddddeee
clientSecret: $oidc.okta.clientSecret
# Optional set of OIDC scopes to request. If omitted, defaults to: ["openid", "profile", "email", "groups"]
requestedScopes: ["openid", "profile", "email", "groups"]
# Optional set of OIDC claims to request on the ID token.
requestedIDTokenClaims: {"groups": {"essential": true}}
# Some OIDC providers require a separate clientID for different callback URLs.
# For example, if configuring Argo CD with self-hosted Dex, you will need a separate client ID
# for the 'localhost' (CLI) client to Dex. This field is optional. If omitted, the CLI will
# use the same clientID as the Argo CD server
cliClientID: vvvvwwwwxxxxyyyyzzzz
```
!!! note
The callback address should be the /auth/callback endpoint of your Argo CD URL
(e.g. https://argocd.example.com/auth/callback).
### Requesting additional ID token claims
Not all OIDC providers support a special `groups` scope. E.g. Okta, OneLogin and Microsoft do support a special
`groups` scope and will return group membership with the default `requestedScopes`.
Other OIDC providers might be able to return a claim with group membership if explicitly requested to do so.
Individual claims can be requested with `requestedIDTokenClaims`, see
[OpenID Connect Claims Parameter](https://connect2id.com/products/server/docs/guides/requesting-openid-claims#claims-parameter)
for details. The Argo CD configuration for claims is as follows:
```yaml
oidc.config: |
requestedIDTokenClaims:
email:
essential: true
groups:
essential: true
value: org:myorg
acr:
essential: true
values:
- urn:mace:incommon:iap:silver
- urn:mace:incommon:iap:bronze
```
For a simple case this can be:
```yaml
oidc.config: |
requestedIDTokenClaims: {"groups": {"essential": true}}
```
### Configuring a custom logout URL for your OIDC provider
Optionally, if your OIDC provider exposes a logout API and you wish to configure a custom logout URL for the purposes of invalidating
any active session post logout, you can do so by specifying it as follows:
```yaml
oidc.config: |
name: example-OIDC-provider
issuer: https://example-OIDC-provider.com
clientID: xxxxxxxxx
clientSecret: xxxxxxxxx
requestedScopes: ["openid", "profile", "email", "groups"]
requestedIDTokenClaims: {"groups": {"essential": true}}
logoutURL: https://example-OIDC-provider.com/logout?id_token_hint={{token}}
```
By default, this would take the user to their OIDC provider's login page after logout. If you also wish to redirect the user back to Argo CD after logout, you can specify the logout URL as follows:
```yaml
...
logoutURL: https://example-OIDC-provider.com/logout?id_token_hint={{token}}&post_logout_redirect_uri={{logoutRedirectURL}}
```
You are not required to specify a logoutRedirectURL as this is automatically generated by ArgoCD as your base ArgoCD url + Rootpath
!!! note
The post logout redirect URI may need to be whitelisted against your OIDC provider's client settings for ArgoCD.
## SSO Further Reading
### Sensitive Data and SSO Client Secrets
You can use the `argocd-secret` to store any sensitive data. ArgoCD knows to check the keys under `data` in the `argocd-secret` secret for a corresponding key whenever a value in a configmap starts with `$`. This can be used to store things such as your `clientSecret`.
* Any values which start with `$` will :
- If value is in form of `$<secret>:a.key.in.k8s.secret`, look to a key in K8S `<secret>` of the same name (minus the `$`), and reads it value.
- Otherwise, look to a key in `argocd-secret` of the same name (minus the `$`),
to obtain the actual value. This allows you to store the `clientSecret` as a kubernetes secret.
Kubernetes secrets must be base64 encoded. To base64 encode your secret, you can run
`printf RAW_STRING | base64`.
Data should be base64 encoded before it is added to `argocd-secret`. You can do so by running `printf RAW_SECRET_STRING | base64`.
#### Example
`argocd-secret`:
```yaml
apiVersion: v1
kind: Secret
metadata:
name: argocd-secret
namespace: argocd
labels:
app.kubernetes.io/name: argocd-secret
app.kubernetes.io/part-of: argocd
type: Opaque
data:
...
# Store client secret like below.
# Ensure the secret is base64 encoded
oidc.auth0.clientSecret: <client-secret-base64-encoded>
...
```
`argocd-cm`:
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: argocd-cm
namespace: argocd
labels:
app.kubernetes.io/name: argocd-cm
app.kubernetes.io/part-of: argocd
data:
...
oidc.config: |
name: Auth0
clientID: aabbccddeeff00112233
# Reference key in argocd-secret
clientSecret: $oidc.auth0.clientSecret
...
```
#### Alternative
If you want to store sensitive data in **another** Kubernetes `Secret`, instead of `argocd-secret`. ArgoCD knows to check the keys under `data` in your Kubernetes `Secret` for a corresponding key whenever a value in a configmap starts with `$`, then your Kubernetes `Secret` name and `:` (colon).
Syntax: `$<k8s_secret_name>:<a_key_in_that_k8s_secret>`
> NOTE: Secret must have label `app.kubernetes.io/part-of: argocd`
##### Example
`another-secret`:
```yaml
apiVersion: v1
kind: Secret
metadata:
name: another-secret
namespace: argocd
labels:
app.kubernetes.io/part-of: argocd
type: Opaque
data:
...
# Store client secret like below.
# Ensure the secret is base64 encoded
oidc.auth0.clientSecret: <client-secret-base64-encoded>
...
```
`argocd-cm`:
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: argocd-cm
namespace: argocd
labels:
app.kubernetes.io/name: argocd-cm
app.kubernetes.io/part-of: argocd
data:
...
oidc.config: |
name: Auth0
clientID: aabbccddeeff00112233
# Reference key in another-secret (and not argocd-secret)
clientSecret: $another-secret:oidc.auth0.clientSecret # Mind the ':'
...
```