turbot/steampipe-mod-kubernetes-compliance

Control: ReplicaSet containers admission control plugin should not be set to 'always admit'

Description

This check ensures that the container in the ReplicaSet has an admission control plugin not set to 'always admit'.

Usage

Run the control in your terminal:

powerpipe control run kubernetes_compliance.control.replicaset_container_admission_control_plugin_no_always_admit

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run kubernetes_compliance.control.replicaset_container_admission_control_plugin_no_always_admit --share

SQL

This control uses a named query:

with container_list as (
select
c ->> 'name' as container_name,
trim('"' from split_part(co::text, '=', 2)) as value,
r.name as replicaset
from
kubernetes_replicaset as r,
jsonb_array_elements(template -> 'spec' -> 'containers') as c,
jsonb_array_elements(c -> 'command') as co
where
(co)::text LIKE '%--enable-admission-plugins=%'
), container_name_with_replicaset_name as (
select
r.name as replicaset_name,
r.uid as replicaset_uid,
r.path as path,
r.start_line as start_line,
r.end_line as end_line,
r.context_name as context_name,
r.namespace as namespace,
r.source_type as source_type,
r.tags as tags,
r._ctx as _ctx,
c.*
from
kubernetes_replicaset as r,
jsonb_array_elements(template -> 'spec' -> 'containers') as c
)
select
coalesce(r.replicaset_uid, concat(r.path, ':', r.start_line)) as resource,
case
when (r.value -> 'command') is null or not ((r.value -> 'command') @> '["kube-apiserver"]') then 'ok'
when l.container_name is not null and (r.value -> 'command') @> '["kube-apiserver"]' and ((l.value) like '%AlwaysAdmit%') then 'alarm'
else 'ok'
end as status,
case
when (r.value -> 'command') is null then r.value ->> 'name' || ' command not defined.'
when not ((r.value -> 'command') @> '["kube-apiserver"]') then r.value ->> 'name' || ' kube-apiserver not defined.'
when l.container_name is not null and (r.value -> 'command') @> '["kube-apiserver"]' and ((l.value) like '%AlwaysAdmit%') then r.value ->> 'name' || ' admission control plugin set to always admit.'
else r.value ->> 'name' || ' admission control plugin not set to always pull images.'
end as reason,
r.replicaset_name as replicaset_name
, coalesce(context_name, '') as context_name, namespace, source_type, coalesce(path || ':' || start_line || '-' || end_line, '') as path
from
container_name_with_replicaset_name as r
left join container_list as l on r.value ->> 'name' = l.container_name and r.replicaset_name = l.replicaset;

Tags