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fix: os.Stat returns ENOENT when checking the symlink file's stat of … #508

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fix: os.Stat returns ENOENT when checking the symlink file's stat of … #508

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36 changes: 22 additions & 14 deletions plugins/collector/app.go
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ var (
for _, path := range []string{
"/usr/local/apache2/conf/httpd.conf", "/etc/apache2/apache2.conf",
"/etc/httpd/conf/httpd.conf", "/etc/apache2/httpd.conf"} {
if _, err := os.Stat(filepath.Join(rootPath, path)); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, path)) {
return path
}
}
Expand All @@ -60,7 +60,7 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/etc/nginx/nginx.conf")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/etc/nginx/nginx.conf")) {
return "/etc/nginx/nginx.conf"
}
return ""
Expand All @@ -80,7 +80,7 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/etc/nginx/nginx.conf")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/etc/nginx/nginx.conf")) {
return "/etc/nginx/nginx.conf"
}
return ""
Expand All @@ -100,7 +100,7 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/etc/nginx/nginx.conf")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/etc/nginx/nginx.conf")) {
return "/etc/nginx/nginx.conf"
}
return ""
Expand Down Expand Up @@ -142,7 +142,7 @@ var (
}
if cwd, err := rc.proc.Cwd(); err == nil {
confPath := filepath.Join(cwd, "/conf/defaults.ini")
if _, err := os.Stat(filepath.Join(rootPath, confPath)); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, confPath)) {
return confPath
}
}
Expand All @@ -169,7 +169,7 @@ var (
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
for _, path := range []string{"/etc/my.cnf", "/etc/mysql/my.cnf", "/usr/etc/my.cnf"} {
if _, err := os.Stat(filepath.Join(rootPath, path)); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, path)) {
return path
}
}
Expand All @@ -193,14 +193,14 @@ var (
pgdata := regexp.MustCompile(`-D\s\S+`).Find([]byte(rc.cmdline))
if pgdata != nil {
path := filepath.Join(strings.TrimPrefix(string(pgdata), "-D "), "postgresql.conf")
if _, err := os.Stat(filepath.Join(rootPath, path)); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, path)) {
return path
}
}
if envs, err := rc.proc.Envs(); err == nil {
if pgdata, ok := envs["PGDATA"]; ok {
path := filepath.Join(pgdata, "postgresql.conf")
if _, err := os.Stat(filepath.Join(rootPath, path)); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, path)) {
return path
}
}
Expand Down Expand Up @@ -243,7 +243,7 @@ var (
}
if envs, err := rc.proc.Envs(); err == nil {
if path, ok := envs["ETCD_CONFIG_FILE"]; ok {
if _, err := os.Stat(filepath.Join(rootPath, path)); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, path)) {
return path
}
}
Expand All @@ -266,7 +266,7 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/etc/prometheus/prometheus.yml")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/etc/prometheus/prometheus.yml")) {
return "/etc/prometheus/prometheus.yml"
}
return ""
Expand All @@ -283,7 +283,7 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/var/opt/mssql/mssql-conf")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/var/opt/mssql/mssql-conf")) {
return "/var/opt/mssql/mssql-conf"
}
return ""
Expand Down Expand Up @@ -318,7 +318,7 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/etc/docker/daemon.json")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/etc/docker/daemon.json")) {
return "/etc/docker/daemon.json"
}
return ""
Expand All @@ -343,7 +343,7 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/etc/containerd/config.toml")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/etc/containerd/config.toml")) {
return "/etc/containerd/config.toml"
}
return ""
Expand All @@ -364,12 +364,20 @@ var (
if rc.enterContainer {
rootPath = filepath.Join("/proc", rc.proc.Pid(), "root")
}
if _, err := os.Stat(filepath.Join(rootPath, "/var/lib/kubelet/config")); err == nil {
if existsFile(rc.enterContainer, filepath.Join(rootPath, "/var/lib/kubelet/config")) {
return "/var/lib/kubelet/config"
}
return ""
},
}
existsFile = func(enterContainer bool, file string) bool {
if enterContainer {
_, err := os.Lstat(file)
return err == nil
}
_, err := os.Stat(file)
return err == nil
}
ruleMap = map[string]*AppRule{
"apache2": apacheRule,
"httpd": apacheRule,
Expand Down