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Pod Log Retrieval API & Validation Failure Log Preservation #350

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cc2e7b6
Add ArgoCD pod logs retrieval API
paras-agarwal-meesho Feb 25, 2026
f8afae4
Persist Validation failure logs
paras-agarwal-meesho Feb 27, 2026
d4e7a39
preserve validation logs: correct tests
paras-agarwal-meesho Feb 27, 2026
6987284
preserve validation log: fix bug
paras-agarwal-meesho Feb 27, 2026
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116 changes: 113 additions & 3 deletions horizon/internal/infrastructure/controller/controller.go
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Original file line number Diff line number Diff line change
@@ -1,11 +1,15 @@
package controller

import (
"errors"
"fmt"
"net/http"
"strconv"
"strings"

infrastructurehandler "github.com/Meesho/BharatMLStack/horizon/internal/infrastructure/handler"
workflowHandler "github.com/Meesho/BharatMLStack/horizon/internal/workflow/handler"
"github.com/Meesho/BharatMLStack/horizon/pkg/argocd"
"github.com/gin-gonic/gin"
)

Expand All @@ -18,17 +22,22 @@ func getWorkingEnv(ctx *gin.Context) string {
ctx.JSON(http.StatusInternalServerError, gin.H{"error": "workingEnv not found in context"})
return ""
}
return workingEnv.(string)
workingEnvStr, ok := workingEnv.(string)
if !ok {
ctx.JSON(http.StatusInternalServerError, gin.H{"error": "workingEnv has invalid type"})
return ""
}
return workingEnvStr
}

type InfrastructureController struct {
handler infrastructurehandler.InfrastructureHandler
handler infrastructurehandler.InfrastructureHandler
workflowHandler workflowHandler.Handler
}

func NewController() *InfrastructureController {
return &InfrastructureController{
handler: infrastructurehandler.InitInfrastructureHandler(),
handler: infrastructurehandler.InitInfrastructureHandler(),
workflowHandler: workflowHandler.GetWorkflowHandler(),
}
}
Expand Down Expand Up @@ -61,6 +70,17 @@ type UpdateAutoscalingTriggersRequest struct {
Triggers []interface{} `json:"triggers" binding:"required"` // Array of trigger objects (CPU, cron, prometheus, etc.)
}

// ApplicationLogsQuery holds query params for GET /applications/:appName/logs
type ApplicationLogsQuery struct {
PodName string `form:"podName"`
Container string `form:"container"`
Follow bool `form:"follow"`
Previous bool `form:"previous"`
SinceSeconds string `form:"sinceSeconds"` // string int64, default "0"
TailLines string `form:"tailLines"` // string int64, default "1000"
Filter string `form:"filter"`
}

func (c *InfrastructureController) GetHPAConfig(ctx *gin.Context) {
appName := ctx.Param("appName")
workingEnv := getWorkingEnv(ctx)
Expand Down Expand Up @@ -103,6 +123,96 @@ func (c *InfrastructureController) GetResourceDetail(ctx *gin.Context) {
ctx.JSON(http.StatusOK, resourceDetail)
}

func (c *InfrastructureController) GetApplicationLogs(ctx *gin.Context) {
appName := strings.TrimSpace(ctx.Param("appName"))
workingEnv := getWorkingEnv(ctx)
if workingEnv == "" {
return
}
if appName == "" {
ctx.JSON(http.StatusBadRequest, gin.H{"error": gin.H{
"message": "appName is required",
}})
return
}

var q ApplicationLogsQuery
if err := ctx.ShouldBindQuery(&q); err != nil {
ctx.JSON(http.StatusBadRequest, gin.H{"error": gin.H{
"message": "invalid query parameters",
}})
return
}

container := strings.TrimSpace(q.Container)
if container == "" {
ctx.JSON(http.StatusBadRequest, gin.H{
"error": gin.H{
"message": "container is required",
},
})
return
}

if q.Follow {
ctx.JSON(http.StatusBadRequest, gin.H{
"error": gin.H{
"message": "streaming (follow=true) is not supported",
},
})
return
}

sinceSeconds := int64(0)
if q.SinceSeconds != "" {
var err error
sinceSeconds, err = strconv.ParseInt(q.SinceSeconds, 10, 64)
if err != nil || sinceSeconds < 0 {
ctx.JSON(http.StatusBadRequest, gin.H{"error": gin.H{
"message": "sinceSeconds must be a non-negative integer",
}})
return
}
}
tailLines := int64(1000)
if q.TailLines != "" {
var err error
tailLines, err = strconv.ParseInt(q.TailLines, 10, 64)
if err != nil || tailLines < 0 {
ctx.JSON(http.StatusBadRequest, gin.H{"error": gin.H{
"message": "tailLines must be a non-negative integer",
}})
return
}
}
Comment on lines +177 to +187
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@coderabbitai coderabbitai bot Feb 27, 2026

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⚠️ Potential issue | 🟡 Minor

tailLines=0 is accepted here but not honored downstream.

Line 181 accepts 0, but the URL builder later coerces non-positive values to 1000, so caller intent is lost. Please make this contract consistent (either reject 0 here or preserve 0 end-to-end).

One consistent option (reject 0 at API layer) 
 	if q.TailLines != "" {
 		var err error
 		tailLines, err = strconv.ParseInt(q.TailLines, 10, 64)
-		if err != nil || tailLines < 0 {
+		if err != nil || tailLines <= 0 {
 			ctx.JSON(http.StatusBadRequest, gin.H{"error": gin.H{
-				"message": "tailLines must be a non-negative integer",
+				"message": "tailLines must be a positive integer",
 			}})
 			return
 		}
 	}
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
tailLines := int64(1000)
if q.TailLines != "" {
var err error
tailLines, err = strconv.ParseInt(q.TailLines, 10, 64)
if err != nil || tailLines < 0 {
ctx.JSON(http.StatusBadRequest, gin.H{"error": gin.H{
"message": "tailLines must be a non-negative integer",
}})
return
}
}
tailLines := int64(1000)
if q.TailLines != "" {
var err error
tailLines, err = strconv.ParseInt(q.TailLines, 10, 64)
if err != nil || tailLines <= 0 {
ctx.JSON(http.StatusBadRequest, gin.H{"error": gin.H{
"message": "tailLines must be a positive integer",
}})
return
}
}
🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@horizon/internal/infrastructure/controller/controller.go` around lines 177 -
187, The handler currently allows tailLines == 0 but downstream URL builder
coerces non-positive values to 1000; make the contract consistent by rejecting 0
at the API layer: in the block that parses q.TailLines (the tailLines variable
and strconv.ParseInt usage around q.TailLines), change the validation to require
tailLines > 0 and return a 400 with a message like "tailLines must be a positive
integer" when it's 0 or negative; this preserves caller intent and aligns with
the URL builder behavior.


opts := &argocd.ApplicationLogsOptions{
PodName: q.PodName,
Container: container,
Previous: q.Previous,
SinceSeconds: sinceSeconds,
TailLines: tailLines,
Filter: q.Filter,
}

entries, err := c.handler.GetApplicationLogs(appName, workingEnv, opts)
if err != nil {
status := http.StatusInternalServerError
var apiErr *argocd.ArgoCDAPIError
if errors.As(err, &apiErr) {
status = apiErr.StatusCode
}
ctx.JSON(status, gin.H{
"error": gin.H{
"message": err.Error(),
},
})
return
}

ctx.JSON(http.StatusOK, entries)
}

func (c *InfrastructureController) RestartDeployment(ctx *gin.Context) {
appName := ctx.Param("appName")
workingEnv := getWorkingEnv(ctx)
Expand Down
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