# Empty variable for services depending on host managed package

**URL:** <https://community.icinga.com/t/empty-variable-for-services-depending-on-host-managed-package/1774>\
**Category:** Icinga 2\
**Tags:** packages, api, icinga2\
**Created:** [July 24, 2019, 11:33am UTC](https://community.icinga.com/t/empty-variable-for-services-depending-on-host-managed-package/1774 "2019-07-24T11:33:26Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![sysres-dev](https://community.icinga.com/user_avatar/community.icinga.com/sysres-dev/32/1023_2.png) [@sysres-dev](https://community.icinga.com/u/sysres-dev)\
**Post date:** [July 24, 2019, 11:33am UTC](https://community.icinga.com/t/empty-variable-for-services-depending-on-host-managed-package/1774/1 "2019-07-24T11:33:26Z")

</div>

Hello,  
I’m in a testing environment with few hosts, with 2 icinga servers, one zone each, one master and one child, both are running r2.10.5-1

I’m not sure what behaviour to expect from following operations :

- 
  1. setup services/commands configuration in /etc/icinga2/zones.d/global-templates

- 
  1. setup host throught stage in a newly created package

- 
  1. change throught API at runtime one of the generated service variable depending on a host created in previous package

- 
  1. apply a change to the host in a new stage of the same package

The idea of those tests is to check if is it possible to change some tresholds at runtime for configuration managed with packages.

When i check for the service variables on icinga console, i still have the values which was previously set at step 3) (which is what i’m needing)  
but when i’m looking at debug.log or last\_check\_result.command the variable disk\_args is empty, like if it was not resolved. I made sure to restart and reload both master and satellites.

I’m not sure if this is an expected behaviour, but in a general way, i’d like to know more about runtime operations on configurations issued from packages, i’m probably missing something.  
The general idea is to find a clean way to manage services variables at runtime depending on hosts managed in a package.

Here are all the related configurations :

etc configurations (step 1) :

/etc/icinga2/zones.d/global-templates/DASHBOARD/commands.conf

```auto
object CheckCommand "custom_check_disk" {
    command = [SysconfDir + "/icinga2/scripts/custom_check_disk.py"]
    arguments = {
        "-H" = {
            required = true
            value = "$address$"
        }
        "-D" = {
            required = true
            value = {{ Json.encode(host.vars.data["disk"]["global"] + macro("$disk_args$")) }}
        }
    }
}

```

/etc/icinga2/zones.d/global-templates/DASHBOARD/services.conf

```auto
apply Service "custom_check_disk" for (disk_args in host.vars.data["disk"].fordisks) {
    name = "custom_check_disk_" + disk_args.disk_name
    retry_interval = 5m
    max_check_attempts = 3
    check_interval = 5m
    retry_interval = 2m
    vars.disk_args = disk_args
    check_command = "custom_check_disk"
    assign where host.vars.data["disk"].fordisks != null
}

```

/etc/icinga2/zones.d/global-templates/CUSTOM/templates.conf

```auto
template Host "custom-host" {
  max_check_attempts = 3
  check_interval = 5m
  retry_interval = 2m
  check_command = "hostalive"
}

```

/etc/icinga2/zones.conf

```auto
object Zone "global-templates" {
        global = true
}

object Endpoint "icinga2-api.my.domain" {
  host = "icinga2-api.my.domain"
}

object Endpoint "icinga2-intranet.my.domain" {
  host = "icinga2-intranet.my.domain"
}

# master zone
object Zone "ressource" {
  endpoints = ["icinga2-api.my.domain"]
}

# child zone
object Zone "intranet" {
  endpoints = ["icinga2-intranet.my.domain"]
  parent = "ressource"
}

```

Package creation (step 2):

```auto
curl -s -k -u admin:password -H 'Accept: application/json' -X POST 'https://localhost:5665/v1/config/packages/test-cmdb?pretty=1'  

```

Stage creation (step 2):

```auto
curl -s -k -u admin:password -H 'Accept: application/json' -X POST -d '{ "files": { "zones.d/intranet/hosts.conf": "object Host \"package_test_1\" { import \"custom-host\" , address = \"1.2.3.4\" , vars = { data = { cpu = { global = { description = \"CPU\" , equipement = \"test-T303\" , name_path = \"CUST\" , param = \"5,15,30\" , script = \"custom_check_cpu\" , sub_dashboard = \"CUST_Cpu_test\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" } }, disk = { fordisks = [{ description = \"DiskC\" , disk_name = \"C\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }, { description = \"DiskD\" , disk_name = \"D\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }], global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_disk\" , sub_dashboard = \"CUST_Disk_test\" } }, ram = { global = { description = \"RAM\" , equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_ram\" , sub_dashboard = \"CUST_Ram_test\" , threshold_critical = \"> 90\" , threshold_ok = \"< 50\" } }, service = { forservices = [{ description = \"Dfs,DFS Namespace\" , display_name = \"DFS Namespace\" , service_name = \"Dfs\" , type_service = \"auto_running\" }, { description = \"MSSQLSERVER,SQL Server (MSSQLSERVER)\" , display_name = \"SQL Server (MSSQLSERVER)\" , service_name = \"MSSQLSERVER\" , type_service = \"auto_running\" }, { description = \"wuauserv,Windows Update\" , display_name = \"Windows Update\" , service_name = \"wuauserv\" , type_service = \"disabled_stopped\" }], global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_service\" , sub_dashboard = \"CUST_Service_test\" } } } }, zone = \"intranet\"},object Host \"package_test_DPH_2\" { import \"custom-host\" , address = \"1.2.3.4\" , vars = { data = { cpu = { global = { description = \"CPU\" , equipement = \"test-T303\" , name_path = \"CUST\" , param = \"5,15,30\" , script = \"custom_check_cpu\" , sub_dashboard = \"CUST_Cpu_test\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" } } , disk = { fordisks = [{ description = \"DiskC\" , disk_name = \"C\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }, { description = \"DiskD\" , disk_name = \"D\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }] , global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_disk\" , sub_dashboard = \"CUST_Disk_test\" } } , ram = { global = { description = \"RAM\" , equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_ram\" , sub_dashboard = \"CUST_Ram_test\" , threshold_critical = \"> 90\" , threshold_ok = \"< 50\" } } , service = { forservices = [{ description = \"Dfs,DFS Namespace\" , display_name = \"DFS Namespace\" , service_name = \"Dfs\" , type_service = \"auto_running\" }, { description = \"MSSQLSERVER,SQL Server (MSSQLSERVER)\" , display_name = \"SQL Server (MSSQLSERVER)\" , service_name = \"MSSQLSERVER\" , type_service = \"auto_running\" }, { description = \"wuauserv,Windows Update\" , display_name = \"Windows Update\" , service_name = \"wuauserv\" , type_service = \"disabled_stopped\" }] , global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_service\" , sub_dashboard = \"CUST_Service_test\" } } } } , zone = \"intranet\"}" }, "pretty": true }' 'https://localhost:5665/v1/config/stages/test-cmdb'  

```

Runtime service variable change (step 3):

```auto
curl -s -k -u admin:password -H 'Accept: application/json' -X POST 'https://localhost:5665/v1/objects/services/package_test_1!custom_check_disk_C' -d '{ "attrs": { "vars": {"service_args":{"description":"DiskC","disk_name ":"C","threshold_critical":"> 90","threshold_ok":"< 90"}}}, "pretty": true }'

```

2nd Stage creation (step 4):

```auto
curl -s -k -u admin:password -H 'Accept: application/json' -X POST -d '{ "files": { "zones.d/intranet/hosts.conf": "object Host \"package_test_1\" { import \"custom-host\" , address = \"1.2.3.4\" , vars = { data = { cpu = { global = { description = \"CPU\" , equipement = \"test-T303\" , name_path = \"CUST\" , param = \"5,15,30\" , script = \"custom_check_cpu\" , sub_dashboard = \"CUST_Cpu_test\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" } }, disk = { fordisks = [{ description = \"DiskC\" , disk_name = \"C\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }, { description = \"DiskD\" , disk_name = \"D\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }], global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_disk\" , sub_dashboard = \"CUST_Disk_test\" } }, ram = { global = { description = \"RAM\" , equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_ram\" , sub_dashboard = \"CUST_Ram_test\" , threshold_critical = \"> 90\" , threshold_ok = \"< 50\" } }, service = { forservices = [{ description = \"Ffs,FFS Namespace\" , display_name = \"FFS Namespace\" , service_name = \"Ffs\" , type_service = \"auto_Funning\" }, { description = \"MSSQLSERVER,SQL Server (MSSQLSERVER)\" , display_name = \"SQL Server (MSSQLSERVER)\" , service_name = \"MSSQLSERVER\" , type_service = \"auto_running\" }, { description = \"wuauserv,Windows Update\" , display_name = \"Windows Update\" , service_name = \"wuauserv\" , type_service = \"disabled_stopped\" }], global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_service\" , sub_dashboard = \"CUST_Service_test\" } } } }, zone = \"intranet\"},object Host \"package_test_DPH_2\" { import \"custom-host\" , address = \"1.2.3.4\" , vars = { data = { cpu = { global = { description = \"CPU\" , equipement = \"test-T303\" , name_path = \"CUST\" , param = \"5,15,30\" , script = \"custom_check_cpu\" , sub_dashboard = \"CUST_Cpu_test\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" } } , disk = { fordisks = [{ description = \"DiskC\" , disk_name = \"C\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }, { description = \"DiskD\" , disk_name = \"D\" , threshold_critical = \"> 80\" , threshold_ok = \"< 80\" }] , global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_disk\" , sub_dashboard = \"CUST_Disk_test\" } } , ram = { global = { description = \"RAM\" , equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_ram\" , sub_dashboard = \"CUST_Ram_test\" , threshold_critical = \"> 90\" , threshold_ok = \"< 50\" } } , service = { forservices = [{ description = \"Dfs,DFS Namespace\" , display_name = \"DFS Namespace\" , service_name = \"Dfs\" , type_service = \"auto_running\" }, { description = \"MSSQLSERVER,SQL Server (MSSQLSERVER)\" , display_name = \"SQL Server (MSSQLSERVER)\" , service_name = \"MSSQLSERVER\" , type_service = \"auto_running\" }, { description = \"wuauserv,Windows Update\" , display_name = \"Windows Update\" , service_name = \"wuauserv\" , type_service = \"disabled_stopped\" }] , global = { equipement = \"test-T303\" , name_path = \"CUST\" , script = \"custom_check_service\" , sub_dashboard = \"CUST_Service_test\" } } } } , zone = \"intranet\"}" }, "pretty": true }' 'https://localhost:5665/v1/config/stages/test-cmdb'  

```

Verifications :  
on Node icinga2-intranet.my.domain :

```auto
<1> => get_service("package_test_1","custom_check_disk_C").vars
{
        service_args = {
                description = "DiskC"
                "disk_name " = "C"
                threshold_critical = "> 90"
                threshold_ok = "< 90"
        }
}
<2> => get_service("package_test_1","custom_check_disk_C").last_check_result.command
["/etc/icinga2/scripts/custom_check_disk.py", "-D", "{\"equipement\":\"test-T303\",\"name_path\":\"CUST\",\"script\":\"custom_check_disk\",\"sub_dashboard\":\"CUST_Disk_test\"}", "-H", "1.2.3.4"]
<3> => get_host("package_test_1").vars["data"]["disk"]
{
        fordisks = [ {
                description = "DiskC"
                disk_name = "C"
                threshold_critical = "> 80"
                threshold_ok = "< 80"
        }, {
                description = "DiskD"
                disk_name = "D"
                threshold_critical = "> 80"
                threshold_ok = "< 80"
        } ]
        global = {
                equipement = "test-T303"
                name_path = "CUST"
                script = "custom_check_disk"
                sub_dashboard = "CUST_Disk_test"
        }
}

```

Debug.log confirmation :

```auto
[2019-07-23 19:18:54 +0200] debug/CheckerComponent: Scheduling info for checkable 'package_test_1!custom_check_disk_C' (2019-07-23 19:18:54 +0200): Object 'package_test_1!custom_check_disk_C', Next Check: 2019-07-23 19:18:54 +0200(1.5639e+09).
[2019-07-23 19:18:54 +0200] debug/CheckerComponent: Executing check for 'package_test_1!custom_check_disk_C'
[2019-07-23 19:18:54 +0200] debug/Checkable: Update checkable 'package_test_1!custom_check_disk_C' with check interval '300' from last check time at 2019-07-23 19:13:56 +0200 (1.5639e+09) to next check time at 2019-07-23 19:23:52 +0200(1.5639e+09).
[2019-07-23 19:18:54 +0200] notice/ApiListener: Relaying 'event::SetNextCheck' message
[2019-07-23 19:18:54 +0200] notice/ApiListener: Sending message 'event::SetNextCheck' to 'icinga2-api.my.domain'
[2019-07-23 19:18:54 +0200] notice/Process: Running command '/etc/icinga2/scripts/custom_check_disk.py' '-D' '{"equipement":"test-T303","name_path":"CUST","script":"custom_check_disk","sub_dashboard":"CUST_Disk_test"}' '-H' '1.2.3.4': PID 17639

```

---

<div class="post-metadata">

**Author:** ![dnsmichi](https://community.icinga.com/user_avatar/community.icinga.com/dnsmichi/32/7721_2.png) [@dnsmichi](https://community.icinga.com/u/dnsmichi)\
**Post date:** [July 26, 2019, 12:11pm UTC](https://community.icinga.com/t/empty-variable-for-services-depending-on-host-managed-package/1774/2 "2019-07-26T12:11:12Z")

</div>

I’ve been reading the text and output 3 times now and I couldn’t figure out which parameter is causing trouble here. Can you pinpoint the examples and explain their intent plus expected behaviour? The overall example seems to be really complex.

(might also be the heat over here in Germany 😉 )

---

<div class="post-metadata">

**Author:** ![sysres-dev](https://community.icinga.com/user_avatar/community.icinga.com/sysres-dev/32/1023_2.png) [@sysres-dev](https://community.icinga.com/u/sysres-dev)\
**Post date:** [July 26, 2019, 5:21pm UTC](https://community.icinga.com/t/empty-variable-for-services-depending-on-host-managed-package/1774/3 "2019-07-26T17:21:58Z")

</div>

Thank you for your answer and your time.

After a lot more testing, i found the error, it was a typo in runtime service variable change at step 3 (service\_args key instead of disk\_args in dictionnary in curl), i’m sorry for this mistake, shame on me 🙁

Now i can confirm that service vars runtime changes take precedence over vars defined in package and is persistent after a restart. On overall, it works fine to change package based configuration at runtime.

( it is also hot here )