Add initial osg token renewer doc (SOFTWARE-4763)

docs/other/osg-token-renewer.md

@@ -0,0 +1,174 @@
+Installing and Using the OSG Token Renewal Service
+==================================================
+
+This document contains instructions to install and configure the
+OSG Token Renewal Service package, `osg-token-renewer`,
+for obtaining and automatically renewing tokens with [oidc-agent](https://github.com/indigo-dc/oidc-agent).
+
+
+Before Starting
+---------------
+
+Before starting the installation process, consider the following points
+(consulting [the Reference section below](#reference) as needed):
+
+- An account is needed with an OIDC token issuer that offers the device flow
+- **User and Group IDs:** If they do not exist already, the installation will
+  create the Linux user and group named `osg-token-svc`
+
+As with all OSG software installations, there are some one-time (per host)
+steps to prepare in advance:
+
+- Ensure the host has
+  [a supported operating system](../release/supported_platforms.md)
+- Obtain root access to the host
+- Prepare the [required Yum repositories](../common/yum.md)
+
+
+Installing the OSG Token Renewal Service
+----------------------------------------
+
+Install the OSG Token Renewal Service package:
+
+```console
+root@server # yum install osg-token-renewer
+```
+
+This will install the `osg-token-renewer` scripts & systemd service files,
+and will pull in the `oidc-agent` package that the service depends on.
+
+
+Configuring the OSG Token Renewal Service
+-----------------------------------------
+
+
+### Configuring accounts
+
+To create a new client account named `<ACCOUNT_SHORTNAME>`:
+
+1. Create a corresponding file named `/etc/osg/tokens/<ACCOUNT_SHORTNAME>.pw`
+   with the encryption password to use for this client account.
+1. Consult the
+   [Requesting Tokens](https://opensciencegrid.org/technology/software/requesting-tokens/)
+   document to determine which scopes you will need for this client account.
+1. Run the setup script as follows:
+
+        :::console
+        root@server # osg-token-renewer-setup.sh <ACCOUNT_SHORTNAME>
+
+    For example,
+
+        :::console
+        root@server # osg-token-renewer-setup.sh myaccount123
+
+1. When prompted, enter your Issuer and desired scopes for this account
+   from the list of valid options.
+1. You will also be prompted on the console to visit a web link to authorize
+   the client request with a passcode printed on the console.
+   Follow the prompts (visit the web link, enter the request passcode,
+   log in with your account for your issuer, and authorize the request).
+1. If this succeeds, you will be prompted with a new
+   `[account <ACCOUNT_SHORTNAME>]` section to add to your `config.ini`.
+   Add the section to your `/etc/token-renewer/config.ini`,
+   replacing the example section if it's still there.
+
+Next you can configure one or more tokens for this client account.
+
+
+### Configuring tokens
+
+After you have created an OIDC client account and added it to
+`/osg/token-renewer/config.ini`, you need to create a corresponding `token`
+section in the config for each token that should be generated for this account
+(possibly with different options).
+
+1.  Choose a `<TOKEN_NAME>` and add a new `[token <TOKEN_NAME>]` section
+    (replacing the example section if it's still there).
+
+    The `account` option in this section must match the `<ACCOUNT_SHORTNAME>`
+    for the corresponding `[account <ACCOUNT_SHORTNAME>]` section.
+
+1.  Set the `token_path` to
+    `/etc/osg/tokens/<ACCOUNT_SHORTNAME>.<TOKEN_NAME>.token`
+
+1.  Optionally, you may also specify any of the following options, which will
+    be passed to the `oidc-token` command when generating the token:
+
+    | Option         | Description                                               |
+    |:---------------|:----------------------------------------------------------|
+    | `audience`     | list of audiences to pass via `--aud` option              |
+    | `scope`        | list of scopes to pass via `--scope` option               |
+    | `min_lifetime` | min token lifetime in seconds to pass via `--time` option |
+
+    !!! note
+        For tokens used against an HTCondor-CE, set the `audience` option to
+        `<CE FQDN>:<CE PORT>`.
+
+### Example configuration
+
+<insert example config here with account + token sections>
+
+Managing the OSG Token Renewal Service
+--------------------------------------
+
+These services are managed by `systemctl` and may start additional services as
+dependencies.
+As a reminder, here are common service commands (all run as `root`) for EL7:
+
+| To...                                   | On EL7, run the command...         |
+| :-------------------------------------- | :--------------------------------- |
+| Start a service                         | `systemctl start <SERVICE-NAME>`   |
+| Stop a service                          | `systemctl stop <SERVICE-NAME>`    |
+| Enable a service to start on boot       | `systemctl enable <SERVICE-NAME>`  |
+| Disable a service from starting on boot | `systemctl disable <SERVICE-NAME>` |
+
+### Public cache services
+
+| **Software** | **Service name** | **Notes** |
+|--------------|------------------|-----------|
+| OSG Token Renewer | `osg-token-renewer.service` | The OSG Token Renewer, runs as a "oneshot" service, not a daemon. |
+| OSG Token Renewer timer | `osg-token-renewer.timer` | Nightly run schedule for OSG Token Renewer |
+
+
+The OSG token renewal service is set to run via a systemd timer every 15
+minutes.
+
+If you would like to run the service manually at a different time (e.g., to
+generate all the tokens immediately), you can run the service once with:
+
+```console
+root@host # systemctl start osg-token-renewer
+```
+
+If this succeeds, the new token will be written to the location you configured
+for `token_path` (`/etc/osg/tokens/<ACCOUNT_SHORTNAME>.token`, by convention).
+
+Failures can be diagnosed by running:
+
+```console
+root@host # journalctl -eu osg-token-renewer
+```
+
+Help
+----
+
+To get assistance please use this [Help Procedure](../common/help.md).
+
+
+Reference
+---------
+
+### Files of interest
+
+| Path                                                     | Description                                   |
+|:---------------------------------------------------------|:----------------------------------------------|
+| `/etc/osg/token-renewer/config.ini`                      | Main config file for service                  |
+| `/etc/osg/tokens/<ACCOUNT_SHORTNAME>.pw`                 | Encryption password file for client account   |
+| `/etc/osg/tokens/<ACCOUNT_SHORTNAME>.<TOKEN_NAME>.token` | Output location for token files               |
+| `/usr/bin/osg-token-renewer-setup.sh`                    | Setup script for each new client account      |
+| `/usr/lib/systemd/system/osg-token-renewer.service`      | SystemD service unit configuruation           |
+| `/usr/lib/systemd/system/osg-token-renewer.timer`        | SystemD timer for service                     |
+| `/usr/bin/osg-token-renewer.sh`                          | Main wrapper script invoked by service        |
+| `/usr/bin/osg-token-renewer`                             | Token renewal program invoked by main wrapper |
+
+

mkdocs.yml

@@ -56,6 +56,7 @@ nav:
     - 'Install a CVMFS Stratum 1': 'other/install-cvmfs-stratum1.md'
     - 'Troubleshooting Gratia': 'other/troubleshooting-gratia.md'
     - 'Install Transfer Log Filebeats': 'other/schedd-filebeats.md'
+    - 'Install OSG Token Renewal Service': 'other/install-osg-token-renewer.md'
   - Deprecated:
     - POSIX Storage:
       - 'Install GridFTP Server': 'data/gridftp.md'