APIML Eureka registration

CHANGELOG.md

@@ -2,15 +2,18 @@
 
 All notable changes to the ZSS package will be documented in this file.
 
+## `3.5.0`
+- Enhancement: ZSS can now use eureka registration to APIML, providing improved high availability over prior static registration. Static registration is still available via new property `components.zss.agent.mediationLayer.static: true` and remains default for non-HA setups. [(#811)](https://github.com/zowe/zss/pull/811)
+
 ## `3.4.0`
 - Bugfix: Fixed hostname to IP address lookup for "bind-test" program. [(#801)](https://github.com/zowe/zss/pull/801)
 
 ## `3.3.0`
 - Enhancement: Utility "zis-test" is now used to ensure that ZIS is running and accessible by Zowe before starting ZSS. (zowe/zss#764)
 - Enhancement: Utility "bind-test" is now available in Zowe and used to validate if each Zowe server can succeed in binding to the user requested TCPIP port at each Zowe startup. (zowe/zss#764)
 - Enhancement: zss handles the setting "components.apiml.enabled: true" as an alternative to enabling "gateway", "discovery", and "caching-service" components. [(#787)](https://github.com/zowe/zss/pull/787)
-- Bugfix: JWK logic for single-sign-on to the APIML Gateway had the potential for a high-cpu loop when AT-TLS was enabled and the destination had read errors ([#772](https://github.com/zowe/zss/pull/772))
-- Bugfix: Stop aborting when Zowe starts on new zOS version([#781](https://github.com/zowe/zss/pull/781))
+- Bugfix: JWK logic for single-sign-on to the APIML Gateway had the potential for a high-cpu loop when AT-TLS was enabled and the destination had read errors [(#772)](https://github.com/zowe/zss/pull/772)
+- Bugfix: Stop aborting when Zowe starts on new zOS version[(#781)](https://github.com/zowe/zss/pull/781)
 
 ## `3.2.0`
 - Enhancement: include the stub version in the generated HLASM stub (#743)

bin/configure.sh

@@ -28,3 +28,23 @@ if [ "${ZWE_components_app_server_enabled}" != "true" ]; then
   _CEE_RUNOPTS="XPLINK(ON),HEAPPOOLS(OFF),HEAPPOOLS64(OFF)" ${ZWE_zowe_runtimeDirectory}/bin/utils/configmgr -script "${ZWE_zowe_runtimeDirectory}/components/zss/bin/plugins-init.js"  
 fi
 
+# Register ZSS as a static APIML service when components.zss.agent.mediationLayer.static is enabled.
+# ZWE_components_zss_agent_mediationLayer_static defaults to false; only
+# proceed when it is explicitly set to true.
+if [ "${ZWE_components_zss_agent_mediationLayer_static}" = "true" ]; then
+  if [ -n "${ZWE_STATIC_DEFINITIONS_DIR}" ]; then
+    apiml_static_def="${ZWE_STATIC_DEFINITIONS_DIR}/zss.apiml_static_reg_yaml_template.${ZWE_CLI_PARAMETER_HA_INSTANCE}.yml"
+    apiml_static_src="${COMPONENT_HOME}/apiml-static-reg.yaml.template"
+    parsed_def=$( ( echo "cat <<EOF" ; cat "${apiml_static_src}" ; echo ; echo EOF ) | sh 2>&1)
+    echo "${parsed_def}" > "${apiml_static_def}"
+    chmod 770 "${apiml_static_def}"
+  fi
+else
+  if [ -n "${ZWE_STATIC_DEFINITIONS_DIR}" ]; then
+    apiml_static_def="${ZWE_STATIC_DEFINITIONS_DIR}/zss.apiml_static_reg_yaml_template.${ZWE_CLI_PARAMETER_HA_INSTANCE}.yml"
+    if [ -f "${apiml_static_def}" ]; then
+      rm -f "${apiml_static_def}"
+    fi
+  fi
+fi
+

build/build_zss.sh

@@ -253,6 +253,7 @@ xlc \
   ${ZSS}/c/passTicketService.c \
   ${ZSS}/c/jwk.c \
   ${ZSS}/c/safIdtService.c \
+  ${ZSS}/c/eurekaClient.c \
   ${GSKLIB} 
 
 #then

build/build_zss64.sh

@@ -252,6 +252,7 @@ if ! c89 \
   ${ZSS}/c/passTicketService.c \
   ${ZSS}/c/jwk.c \
   ${ZSS}/c/safIdtService.c \
+  ${ZSS}/c/eurekaClient.c \
   ${GSKLIB} ;
 then
   extattr +p ${ZSS}/bin/zssServer64