Add a v3 migration page

docs/whats-new/zowe-v3-migration.md

@@ -0,0 +1,172 @@
+# Zowe V3 Migration Guide
+
+This guide outlines the steps and changes required to migrate from Zowe v2 to Zowe v3. While the migration process is similar to a Zowe v2 minor release upgrade, there are several new and updated configuration parameters to consider. The workspace directory should be re-created only if you are using the app-server component.
+Follow the steps described in this article to ensure a smooth migration.
+
+
+## Upgrading to the latest version of Zowe v2 (v2.18)
+
+Before upgrading to Zowe v3.0.0, first upgrade to Zowe v2.18, as the rest of the migration instructions are based upon Zowe v2.18.
+Please follow the instructions from the version of Zowe you have and newer in order to prepare to upgrade from Zowe v2 to v3.0.0.
+
+### Migrating from Zowe v2.16.0 or Lower
+
+If you are migrating from Zowe **v2.16.0** or a lower version, perform the following tasks:
+
+1) Ensure the following `zowe.network` section is added to your configuration:
+
+```yaml
+  network:
+    server:
+      tls:
+        attls: false
+        # TLS settings only apply when attls=false
+        # Else you must use AT-TLS configuration for TLS customization.
+        minTls: "TLSv1.2"
+        maxTls: "TLSv1.3"
+    client:
+      tls:
+        attls: false
+```
+
+2) Update your PROCLIB entries for Zowe, as enhancements and default parameters have changed throughout Zowe v2.
+This can be performed with the unix command `zwe init stc`, by running the job ZWEISTC, or by copying the SZWESAMP members ZWESLSTC, ZWESISTC, and ZWESASTC into your desired PROCLIB.
+
+
+### Migrating from Zowe v2.15.0 or Lower
+
+
+If you are migrating from Zowe **v2.15.0** or a lower version, ensure that Zowe configurations using keyrings do not have the section `zowe.certificate.pem`.
+This section is no longer needed and can cause startup error in newer versions of Zowe.
+
+### Migrating from Zowe v2.10.0 or Lower
+
+If you are migrating from Zowe **v2.10.0** or a lower version, consider taking advantage of the new **sysMessages** feature.
+
+The `zowe.sysMessages` is a new array that allows you to select messages that, when found by the launcher, will be duplicated into the system's log.
+
+### Migrating from Zowe v2.9.0 or Lower
+
+If you are migrating from Zowe **v2.9.0** or a lower version, it is recommended to delete the `<zowe.workspaceDirectory>/app-server/plugins` directory so that it can be regenerated on the next run of Zowe.
+In this version and prior there were old and no longer used Application Framework plugins and references to them will complicate logs with harmless errors.
+
+### Migrating from Zowe v2.3.0 or Lower
+
+If you are running Zowe **v2.3.0** or a lower version, a **clean install** of Zowe v3 is highly recommended to avoid potential issues during the migration process.
+
+
+## V3 Prerequisite Changes
+
+Before starting the migration, ensure the following system requirements are met:
+
+- **z/OSMF**  
+Version V2R5 with APAR PH12143 or V3R1 is required. JWT support for z/OSMF must be enabled, [as seen in their documentation.](https://www.ibm.com/docs/en/zos/3.1.0?topic=configurations-enabling-json-web-token-support)
+- **Java**  
+Java 17 is required. The Zowe YAML parameter `java.home` value should be a **Java 17** home location. If an administrator uses `zwe init` to set up Zowe, ensure the `java` for that user is v17 by including it in the `PATH` environment variable.
+- **Node.js**  
+The Zowe YAML parameter `node.home` value should be a **Node.js 18 or 20** home location, as Node 16 and below are no longer supported.
+
+
+## System and Security Changes
+
+- Existing SAF settings for Zowe do not need to be changed for v3, so install steps such as `zwe init security`, the job or workflow ZWESECUR, and the jobs ZWEIRAC, ZWEITSS, and ZWEIACF are not required to be re-run.
+
+- Existing keyrings and keystores do not need to be changed for v3, so install steps such as `zwe init certificate`, the job or workflow ZWEKRING or jobs starting with ZWEIKR* are not required to be re-run.
+
+- The following network changes are needed for added or removed servers:
+
+| Component name | Change | Default Port | Default Jobname | Details |
+|----------------|--------|--------------|-----------------|---------|
+| zaas | Added | 7558 | ZWE1AZ | This component is responsible for authentication and is now required when using the API Mediation Layer |
+| metrics-service | Removed | 7551 | ZWE1MS | This service has been deprecated and removed. Currently, no replacement is available. The Open Telemetry standard will be implemented later, which will serve as a replacement |
+| jobs-api | Removed | 7558 | ZWE1EJ | This component was deprecated in Zowe v2 and is now removed. Ensure that you switch to using equivalent z/OSMF endpoints |
+| files-api | Removed | 7559 | ZWE1EF | This component was deprecated in Zowe v2 and is now removed. Ensure that you switch to using equivalent z/OSMF endpoints |
+| cloud-gateway | Removed | 7563 | ZWE1CG | The cloud-gateway has replaced the main gateway component in v3 and is now accessible on 7554 as ZWE1AG |
+
+
+## Configuration changes
+
+Review the following changes to configuration and updated configuration parameters.
+
+### New Configuration
+
+**components.zaas**  
+  Previously part of the `components.gateway` component, zaas in Zowe v3 is a separate component responsible for authentication.  
+  If you do not explicitly configure this section, zaas will still be enabled by default and will use **port 7558**.
+
+```yaml
+components:
+  zaas:
+    enabled: true
+    port: 7558
+    debug: false
+```
+
+### Updated Configuration Parameters
+---
+
+#### Keyrings
+
+If you are using keyrings, verify that Zowe YAML references to `safkeyring` uses 2 slashes, not 4, such as `safkeyring://` instead of `safkeyring:////`.
+
+#### Gateway z/OSMF service configuration
+
+The service ID for gateway zosmf has changed to **ibmzosmf**. <br/>
+Set `jwtAutoconfiguration` to **jwt** (default) or **ltpa**. Note that **auto** is no longer supported.<br/>
+If you are using zosmf as your auth service, ensure that you update this z/OSMF service configuration. 
+
+```yaml
+components:
+  gateway:
+    apiml:
+      security:
+        auth:
+          zosmf:
+             jwtAutoconfiguration: jwt
+             serviceId: ibmzosmf
+```
+
+#### Caching Service
+
+The Caching service now defaults to **Infinispan** mode instead of **VSAM**.
+While **VSAM** is still supported, this storage method is being deprecated and is not recommended.
+A new parameter for the key exchange port has been added to the default configuraion.
+
+```yaml
+components:
+  caching-service:
+    storage:
+      mode: infinispan
+      infinispan:
+        jgroups:
+          port: 7600
+          keyExchange:
+            port: 7601
+```
+#### ZSS Server
+
+The ZSS server now runs in **64-bit** mode by default.
+
+```yaml
+components:
+  zss:
+    agent:
+      64bit: true
+```
+
+### Deprecated Settings:
+
+The following configuration parameters have been deprecated in Zowe v3. Ensure that these parameters are removed from your configuration.
+
+**zowe.useConfigmgr**  
+The parameter `zowe.useConfigmgr=false` is no longer supported.
+
+**components.gateway.server.internal**  
+The internal gateway server has been removed due to limited usage.
+
+```yaml
+components:
+  gateway:
+    server:
+      internal:
+```

sidebars.js

@@ -39,6 +39,7 @@ module.exports = {
         "whats-new/zowe-v3-office-hours",
         "whats-new/zowe-v3-conformance-criteria",
         "whats-new/zowe-v3-frequently-asked-questions",
+        "whats-new/zowe-v3-migration",
       ],
     },
   ],