vector/kubernetes/
pod_manager_logic.rs

1//! This mod contains bits of logic related to the `kubelet` part called
2//! Pod Manager internal implementation.
3
4use k8s_openapi::apimachinery::pkg::apis::meta::v1::ObjectMeta;
5
6/// Extract the static pod config hashsum from the mirror pod annotations.
7///
8/// This part of Kubernetes changed a bit over time, so we're implementing
9/// support up to 1.14, which is an MSKV at this time.
10///
11/// See: <https://github.com/kubernetes/kubernetes/blob/cea1d4e20b4a7886d8ff65f34c6d4f95efcb4742/pkg/kubelet/pod/mirror_client.go#L80-L81>
12pub fn extract_static_pod_config_hashsum(metadata: &ObjectMeta) -> Option<&str> {
13    let annotations = metadata.annotations.as_ref()?;
14    annotations
15        .get("kubernetes.io/config.mirror")
16        .map(String::as_str)
17}
18
19#[cfg(test)]
20mod tests {
21    use super::*;
22
23    #[test]
24    fn test_extract_static_pod_config_hashsum() {
25        let cases = vec![
26            (ObjectMeta::default(), None),
27            (
28                ObjectMeta {
29                    annotations: Some(vec![].into_iter().collect()),
30                    ..ObjectMeta::default()
31                },
32                None,
33            ),
34            (
35                ObjectMeta {
36                    annotations: Some(
37                        vec![(
38                            "kubernetes.io/config.mirror".to_owned(),
39                            "config-hashsum".to_owned(),
40                        )]
41                        .into_iter()
42                        .collect(),
43                    ),
44                    ..ObjectMeta::default()
45                },
46                Some("config-hashsum"),
47            ),
48            (
49                ObjectMeta {
50                    annotations: Some(
51                        vec![
52                            (
53                                "kubernetes.io/config.mirror".to_owned(),
54                                "config-hashsum".to_owned(),
55                            ),
56                            ("other".to_owned(), "value".to_owned()),
57                        ]
58                        .into_iter()
59                        .collect(),
60                    ),
61                    ..ObjectMeta::default()
62                },
63                Some("config-hashsum"),
64            ),
65        ];
66
67        for (metadata, expected) in cases {
68            assert_eq!(extract_static_pod_config_hashsum(&metadata), expected);
69        }
70    }
71}
vector/kubernetes/pod_manager_logic.rs

vector/kubernetes/
pod_manager_logic.rs
