feat: use TMPDIR env variable during preflights

if TMPDIR is not empty we should use it during preflights.

cmd/embedded-cluster/install.go

@@ -128,10 +128,16 @@ func RunHostPreflights(c *cli.Context, applier *addons.Applier, replicatedAPIURL
 		return fmt.Errorf("unable to read host preflights: %w", err)
 	}
 
+	tmpdir := "/tmp"
+	if t := os.Getenv("TMPDIR"); t != "" {
+		tmpdir = t
+	}
+
 	data := preflights.TemplateData{
 		ReplicatedAPIURL: replicatedAPIURL,
 		ProxyRegistryURL: proxyRegistryURL,
 		IsAirgap:         isAirgap,
+		TempDir:          tmpdir,
 	}
 	chpfs, err := preflights.GetClusterHostPreflights(c.Context, data)
 	if err != nil {

pkg/preflights/host-preflight.yaml

@@ -18,7 +18,7 @@ spec:
         path: /var/openebs
     - diskUsage:
         collectorName: tmp-path-usage
-        path: /tmp
+        path: {{ .TempDir }}
     - memory: {}
     - cpu: {}
     - time: {}
@@ -178,9 +178,9 @@ spec:
         outcomes:
           - fail:
               when: 'total < 5Gi'
-              message: The filesystem at /tmp has less than 5Gi of total space
+              message: The filesystem at {{ .TempDir }} has less than 5Gi of total space
           - pass:
-              message: The filesystem at /tmp has sufficient space
+              message: The filesystem at {{ .TempDir }} has sufficient space
     - textAnalyze:
         checkName: Default Route
         fileName: host-collectors/run-host/ip-route-table.txt

pkg/preflights/template.go

@@ -11,6 +11,7 @@ type TemplateData struct {
 	IsAirgap         bool
 	ReplicatedAPIURL string
 	ProxyRegistryURL string
+	TempDir          string
 }
 
 func renderTemplate(spec string, data TemplateData) (string, error) {