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feat(inputs.procstat): add tcp related metrics
For a given process, return the number of connections in each state: SYN_SENT, SYN_RECV, ESTABLISHED, etc. Also added a new measurement, procstat_tcp, that returns the endpoints where the process is connected to and where it is listening. If it is listening in "[::]" or "0.0.0.0", resolve with the local IPs.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| package procstat | ||
|
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| import ( | ||
| "fmt" | ||
| "net" | ||
| ) | ||
|
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| const ( | ||
| // dockerMACPrefix https://macaddress.io/faq/how-to-recognise-a-docker-container-by-its-mac-address | ||
| dockerMACPrefix = "02:42" | ||
| //nolint:lll // avoid splitting the link | ||
| // virtualBoxMACPrefix https://github.com/mdaniel/virtualbox-org-svn-vbox-trunk/blob/2d259f948bc352ee400f9fd41c4a08710cd9138a/src/VBox/HostDrivers/VBoxNetAdp/VBoxNetAdp.c#L93 | ||
| virtualBoxMACPrefix = "0a:00:27" | ||
| // hardwareAddrLength is the number of bytes of a MAC address | ||
| hardwareAddrLength = 6 | ||
| ) | ||
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| // errPIDNotFound is the error generated when the pid does not have network info | ||
| var errPIDNotFound = fmt.Errorf("pid not found") | ||
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| // inodeInfo represents information of a proc associated with an inode | ||
| type inodeInfo struct { | ||
| pid uint32 | ||
| } | ||
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| // networkInfo implements networkInfo using the netlink calls and parsing /proc to map sockets to PIDs | ||
| type networkInfo struct { | ||
| // tcp contains the connection info for each pid | ||
| tcp map[uint32][]connInfo | ||
| // listenPorts is a map with the listen ports in the host, used to ignore inbound connections | ||
| listenPorts map[uint32]interface{} | ||
| // publicIPs list of IPs considered "public" (used to connect to other hosts) | ||
| publicIPs []net.IP | ||
| // privateIPs list of IPs considered "private" (loopback, virtual interfaces, point2point, etc) | ||
| privateIPs []net.IP | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| //go:build !linux | ||
| // +build !linux | ||
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| package procstat | ||
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| import ( | ||
| "fmt" | ||
| "net" | ||
| ) | ||
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| type connInfo struct{} | ||
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| func (n *NetworkInfo) IsAListenPort(port uint32) bool { | ||
| return false | ||
| } | ||
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| func (n *NetworkInfo) Fetch() error { | ||
| return nil | ||
| } | ||
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| func (n *NetworkInfo) GetConnectionsByPid(pid uint32) (conn []connInfo, err error) { | ||
| return conn, fmt.Errorf("platform not supported") | ||
| } | ||
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| func (n *NetworkInfo) GetPublicIPs() []net.IP { | ||
| return []net.IP{} | ||
| } | ||
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| func (n *NetworkInfo) GetPrivateIPs() []net.IP { | ||
| return []net.IP{} | ||
| } | ||
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| func (n *NetworkInfo) IsPidListeningInAddr(pid uint32, ip net.IP, port uint32) bool { | ||
| return false | ||
| } |
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