Kubernetes monitoring issue with Sensu (sensu-plugins/sensu-plugins-kubernetes)

Sensu Go
1

sensu-plugins/sensu-plugins-kubernetes is not working as expected.

<!-- I am trying to add my kubernetes cluster monitoring through Sensu-go, So far I have added assets sensu-plugins/sensu-plugins-kubernetes (https://bonsai.sensu.io/assets/sensu-plugins/sensu-plugins-kubernetes/versions/5.0.2) and sensu/sensu-ruby-runtime (https://bonsai.sensu.io/assets/sensu/sensu-ruby-runtime/versions/0.2.1) -->

#sensuctl asset list
                   Name                                                                URL                                                Hash
───────────────────────────────────────── ───────────────────────────────────────────────────────────────────────────────────────────── ──────────
  sensu-plugins/sensu-plugins-kubernetes   //assets.bonsai.sensu.io/.../sensu-plugins-kubernetes_5.0.2_debian9_linux_amd64.tar.gz        0766bb5
  sensu-plugins/sensu-plugins-kubernetes   //assets.bonsai.sensu.io/.../sensu-plugins-kubernetes_5.0.2_debian_linux_amd64.tar.gz         91d971c
  sensu-plugins/sensu-plugins-kubernetes   //assets.bonsai.sensu.io/.../sensu-plugins-kubernetes_5.0.2_centos7_linux_amd64.tar.gz        edc2ff2
  sensu-plugins/sensu-plugins-kubernetes   //assets.bonsai.sensu.io/.../sensu-plugins-kubernetes_5.0.2_centos6_linux_amd64.tar.gz        ed7cf1d
  sensu-plugins/sensu-plugins-kubernetes   //assets.bonsai.sensu.io/.../sensu-plugins-kubernetes_5.0.2_alpine3.8_linux_amd64.tar.gz      715964e
  sensu-plugins/sensu-plugins-kubernetes   //assets.bonsai.sensu.io/.../sensu-plugins-kubernetes_5.0.2_alpine_linux_amd64.tar.gz         986248f
  sensu/sensu-ruby-runtime                 //assets.bonsai.sensu.io/.../sensu-ruby-runtime_0.2.1_ruby-2.4.4_debian_linux_amd64.tar.gz    ff3ba13
  sensu/sensu-ruby-runtime                 //assets.bonsai.sensu.io/.../sensu-ruby-runtime_0.2.1_ruby-2.4.4_centos6_linux_amd64.tar.gz   702d49d
  sensu/sensu-ruby-runtime                 //assets.bonsai.sensu.io/.../sensu-ruby-runtime_0.2.1_ruby-2.4.4_amzn2_linux_amd64.tar.gz     34d8b1b
  sensu/sensu-ruby-runtime                 //assets.bonsai.sensu.io/.../sensu-ruby-runtime_0.2.1_ruby-2.4.4_amzn1_linux_amd64.tar.gz     ca25106
  sensu/sensu-ruby-runtime                 //assets.bonsai.sensu.io/.../sensu-ruby-runtime_0.2.1_ruby-2.4.4_centos8_linux_amd64.tar.gz   0da51b4
  sensu/sensu-ruby-runtime                 //assets.bonsai.sensu.io/.../sensu-ruby-runtime_0.2.1_ruby-2.4.4_centos7_linux_amd64.tar.gz   9204c46
  sensu/sensu-ruby-runtime                 //assets.bonsai.sensu.io/.../sensu-ruby-runtime_0.2.1_ruby-2.4.4_alpine_linux_amd64.tar.gz    eea1c2e

I was getting below error when setting up the alert.

/var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require': Error loading shared library libffi.so.6: No such file or directory (needed by /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/ffi-1.13.1/lib/ffi_c.so) - /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/ffi-1.13.1/lib/ffi_c.so (LoadError)
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/ffi-1.13.1/lib/ffi.rb:6:in `rescue in <top (required)>'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/ffi-1.13.1/lib/ffi.rb:3:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/http-parser-1.2.1/lib/http-parser.rb:3:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/http-4.4.1/lib/http/response/parser.rb:3:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/http-4.4.1/lib/http/connection.rb:6:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/http-4.4.1/lib/http/client.rb:9:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/http-4.4.1/lib/http.rb:8:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/kubeclient-4.9.1/lib/kubeclient/watch_stream.rb:2:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/gems/kubeclient-4.9.1/lib/kubeclient.rb:16:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/bundler/gems/sensu-plugins-kubernetes-a82804509e76/lib/sensu-plugins-kubernetes/client.rb:3:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/bundler/gems/sensu-plugins-kubernetes-a82804509e76/lib/sensu-plugins-kubernetes/cli.rb:4:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/lib/ruby/2.4.0/bundler/gems/sensu-plugins-kubernetes-a82804509e76/bin/check-kube-pods-running.rb:51:in `<top (required)>'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/bin/check-kube-pods-running.rb:14:in `load'
	from /var/cache/sensu/sensu-agent/715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd/bin/check-kube-pods-running.rb:14:in `<main>'

{
    "type": "CheckConfig",
    "api_version": "core/v2",
    "metadata": {
        "name": "dnv.test.k8s.pod.running",
        "namespace": "dnv.test",
        "created_by": "admin"
    },
    "spec": {
        "check_hooks": null,
        "command": "check-kube-pods-running.rb --time 60 --in-cluster",
        "env_vars": null,
        "handlers": [
            "slack-warning"
        ],
        "high_flap_threshold": 0,
        "interval": 60,
        "low_flap_threshold": 0,
        "output_metric_format": "",
        "output_metric_handlers": null,
        "pipelines": [],
        "proxy_entity_name": "",
        "publish": true,
        "round_robin": false,
        "runtime_assets": [
            "sensu-plugins/sensu-plugins-kubernetes",
            "sensu/sensu-ruby-runtime"
        ],
        "secrets": null,
        "stdin": false,
        "subdue": null,
        "subscriptions": [
            "entity:aks-nodepool2-12345678-vmss000002"
        ],
        "timeout": 0,
        "ttl": 0
    }
}

Description of steps I’ve taken to attempt to solve the issue.

<!-- Basically sensu-plugins/sensu-plugins-kubernetes is looking for libffi.so.6 file from sensu/sensu-ruby-runtime but instead libffi.so.6 , it has libffi.so.7 and due to that checks is failing, to cross check, I exec in to sensu pod and copy libffi.so.7 as libffi.so.6 under container path "/var/cache/sensu/sensu-agent/eea1c2e*" and it's started working -->

# kubectl exec -it sensu-agent-bhmgd /bin/sh
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
/ # cd /var/cache/sensu/sensu-agent/
/var/cache/sensu/sensu-agent # ls
715964e8e927f608a605ac3d6e45721ba706bbb2c7f222de8bdf0a1bba0b8aa6c50ccd1e7ba07ed68c96ab83961b8238de6d8e0ad836e43a71008fda240f8bcd
assets.db
eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df
fa25e317ba8aa3e23d9e3d3c54081ca4529aeba2e7ee437a2bf1ed8cfb3fbf70cd0380eb8cc427a9be17515e437f6346949381cc7ce47f37493e32eb8372ded8
queue.db
/var/cache/sensu/sensu-agent # cd eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/
/var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df # ls
bin      include  lib      share
/var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df # cd lib/
/var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib # ls
ld-musl-x86_64.so.1  libcrypto.so.1.1     libgdbm.so.6         libm.so.6            libreadline.so.8     libssl.so.1.1        libyaml-0.so.2
libc.so.6            libffi.so.7          libgdbm_compat.so.4  libncursesw.so.6     librt.so.1           libstdc++.so.6       libz.so.1
libcrypt.so.1        libgcc_s.so.1        libgmp.so.10         libpthread.so.0      libruby-static.a     libutil.so.1         ruby
/var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib # cp libffi.so.7 libffi.so.6 
/var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib # ls -ltrh
total 52M    
drwxr-xr-x    6 root     root        4.0K Feb  1 09:44 ruby
-rwxr-xr-x    1 root     root       97.8K Feb  1 09:44 libz.so.1
-rwxr-xr-x    1 root     root      105.7K Feb  1 09:44 libyaml-0.so.2
-rwxr-xr-x    1 root     root      590.6K Feb  1 09:44 libutil.so.1
-rwxr-xr-x    1 root     root        1.6M Feb  1 09:44 libstdc++.so.6
-rwxr-xr-x    1 root     root      511.5K Feb  1 09:44 libssl.so.1.1
-rw-r--r--    1 root     root       41.6M Feb  1 09:44 libruby-static.a
-rwxr-xr-x    1 root     root      590.6K Feb  1 09:44 librt.so.1
-rwxr-xr-x    1 root     root      286.7K Feb  1 09:44 libreadline.so.8
-rwxr-xr-x    1 root     root      590.6K Feb  1 09:44 libpthread.so.0
-rwxr-xr-x    1 root     root      363.0K Feb  1 09:44 libncursesw.so.6
-rwxr-xr-x    1 root     root      590.6K Feb  1 09:44 libm.so.6
-rwxr-xr-x    1 root     root      405.7K Feb  1 09:44 libgmp.so.10
-rwxr-xr-x    1 root     root       13.6K Feb  1 09:44 libgdbm_compat.so.4
-rwxr-xr-x    1 root     root       53.8K Feb  1 09:44 libgdbm.so.6
-rw-r--r--    1 root     root       97.8K Feb  1 09:44 libgcc_s.so.1
-rwxr-xr-x    1 root     root       38.0K Feb  1 09:44 libffi.so.7
-rwxr-xr-x    1 root     root        2.5M Feb  1 09:44 libcrypto.so.1.1
-rwxr-xr-x    1 root     root      590.6K Feb  1 09:44 libcrypt.so.1
-rwxr-xr-x    1 root     root      590.6K Feb  1 09:44 libc.so.6
-rwxr-xr-x    1 root     root      590.6K Feb  1 09:44 ld-musl-x86_64.so.1
-rwxr-xr-x    1 root     root       38.0K Feb  1 09:45 libffi.so.6
/var/cache/sensu/sensu-agent/eea1c2eb928e59d94f39e8c2c90315ca6145590462f2bab60f2d7798f15ec0caaf0310047aeba478901651a78fce9b23c848a016cfa133f43aa99bc880d4d4df/lib #

Now I am looking for solution to either get libffi.so.6 in to sensu/sensu-ruby-runtime it self or sensu-plugins/sensu-plugins-kubernetes can use libffi.so.7 which is available under sensu/sensu-ruby-runtime.

Please do suggest. I am very new in to Sensu and need your help to get this fixed.

Operating system information

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  • Ubuntu
2

This is sorted. I used previous version of ruby-runtime as below.

sensuctl asset add sensu/sensu-ruby-runtime:0.0.11 --rename sensu/sensu-ruby-runtime_kube_monitor

I have other query regarding kubernetes Cronjobs.

Is there any way to monitor kubernetes cronjobs whether it was successful or fail with Sensu? Please do the needful.

3

Hey there. So the issue you originally raised looks like it’s due to an OS mismatch. My read is that this is occurred not because of the ruby version (which, 2.4 is EOL, so using the 3.2 runtime (sensu-ruby32-runtime versions) is advised), but rather than the underlying OS is running on something like CentOS 7 and had downloaded a CentOS 6 asset.

As far as monitoring cronjobs, if metrics for the cronjobs are exposed in your deployment, then you can use a curl or the http-checks plugin to gather metrics and then use metric threshold evaluation to alert you if there’s some metric for the cronjobs that goes out of bounds.

4

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