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package envconfig
import (
"errors"
"fmt"
"log/slog"
"net"
"os"
"path/filepath"
"runtime"
"strconv"
"strings"
)
type OllamaHost struct {
Scheme string
Host string
Port string
}
func (o OllamaHost) String() string {
return fmt.Sprintf("%s://%s:%s", o.Scheme, o.Host, o.Port)
}
var ErrInvalidHostPort = errors.New("invalid port specified in OLLAMA_HOST")
var (
// Set via OLLAMA_ORIGINS in the environment
AllowOrigins []string
// Set via OLLAMA_DEBUG in the environment
Debug bool
// Experimental flash attention
FlashAttention bool
// Set via OLLAMA_HOST in the environment
Host *OllamaHost
// Set via OLLAMA_KEEP_ALIVE in the environment
KeepAlive string
// Set via OLLAMA_LLM_LIBRARY in the environment
LLMLibrary string
// Set via OLLAMA_MAX_LOADED_MODELS in the environment
MaxRunners int
// Set via OLLAMA_MAX_QUEUE in the environment
MaxQueuedRequests int
// Set via OLLAMA_MODELS in the environment
ModelsDir string
// Set via OLLAMA_MAX_VRAM in the environment
MaxVRAM uint64
// Set via OLLAMA_NOHISTORY in the environment
NoHistory bool
// Set via OLLAMA_NOPRUNE in the environment
NoPrune bool
// Set via OLLAMA_NUM_PARALLEL in the environment
NumParallel int
// Set via OLLAMA_RUNNERS_DIR in the environment
RunnersDir string
// Set via OLLAMA_SCHED_SPREAD in the environment
SchedSpread bool
// Set via OLLAMA_TMPDIR in the environment
TmpDir string
// Set via OLLAMA_INTEL_GPU in the environment
IntelGpu bool
// Set via CUDA_VISIBLE_DEVICES in the environment
CudaVisibleDevices string
// Set via HIP_VISIBLE_DEVICES in the environment
HipVisibleDevices string
// Set via ROCR_VISIBLE_DEVICES in the environment
RocrVisibleDevices string
// Set via GPU_DEVICE_ORDINAL in the environment
GpuDeviceOrdinal string
// Set via HSA_OVERRIDE_GFX_VERSION in the environment
HsaOverrideGfxVersion string
)
type EnvVar struct {
Name string
Value any
Description string
}
func AsMap() map[string]EnvVar {
ret := map[string]EnvVar{
"OLLAMA_DEBUG": {"OLLAMA_DEBUG", Debug, "Show additional debug information (e.g. OLLAMA_DEBUG=1)"},
"OLLAMA_FLASH_ATTENTION": {"OLLAMA_FLASH_ATTENTION", FlashAttention, "Enabled flash attention"},
"OLLAMA_HOST": {"OLLAMA_HOST", Host, "IP Address for the ollama server (default 127.0.0.1:11434)"},
"OLLAMA_KEEP_ALIVE": {"OLLAMA_KEEP_ALIVE", KeepAlive, "The duration that models stay loaded in memory (default \"5m\")"},
"OLLAMA_LLM_LIBRARY": {"OLLAMA_LLM_LIBRARY", LLMLibrary, "Set LLM library to bypass autodetection"},
"OLLAMA_MAX_LOADED_MODELS": {"OLLAMA_MAX_LOADED_MODELS", MaxRunners, "Maximum number of loaded models (default 1)"},
"OLLAMA_MAX_QUEUE": {"OLLAMA_MAX_QUEUE", MaxQueuedRequests, "Maximum number of queued requests"},
"OLLAMA_MAX_VRAM": {"OLLAMA_MAX_VRAM", MaxVRAM, "Maximum VRAM"},
"OLLAMA_MODELS": {"OLLAMA_MODELS", ModelsDir, "The path to the models directory"},
"OLLAMA_NOHISTORY": {"OLLAMA_NOHISTORY", NoHistory, "Do not preserve readline history"},
"OLLAMA_NOPRUNE": {"OLLAMA_NOPRUNE", NoPrune, "Do not prune model blobs on startup"},
"OLLAMA_NUM_PARALLEL": {"OLLAMA_NUM_PARALLEL", NumParallel, "Maximum number of parallel requests (default 1)"},
"OLLAMA_ORIGINS": {"OLLAMA_ORIGINS", AllowOrigins, "A comma separated list of allowed origins"},
"OLLAMA_RUNNERS_DIR": {"OLLAMA_RUNNERS_DIR", RunnersDir, "Location for runners"},
"OLLAMA_SCHED_SPREAD": {"OLLAMA_SCHED_SPREAD", SchedSpread, "Always schedule model across all GPUs"},
"OLLAMA_TMPDIR": {"OLLAMA_TMPDIR", TmpDir, "Location for temporary files"},
}
if runtime.GOOS != "darwin" {
ret["CUDA_VISIBLE_DEVICES"] = EnvVar{"CUDA_VISIBLE_DEVICES", CudaVisibleDevices, "Set which NVIDIA devices are visible"}
ret["HIP_VISIBLE_DEVICES"] = EnvVar{"HIP_VISIBLE_DEVICES", HipVisibleDevices, "Set which AMD devices are visible"}
ret["ROCR_VISIBLE_DEVICES"] = EnvVar{"ROCR_VISIBLE_DEVICES", RocrVisibleDevices, "Set which AMD devices are visible"}
ret["GPU_DEVICE_ORDINAL"] = EnvVar{"GPU_DEVICE_ORDINAL", GpuDeviceOrdinal, "Set which AMD devices are visible"}
ret["HSA_OVERRIDE_GFX_VERSION"] = EnvVar{"HSA_OVERRIDE_GFX_VERSION", HsaOverrideGfxVersion, "Override the gfx used for all detected AMD GPUs"}
ret["OLLAMA_INTEL_GPU"] = EnvVar{"OLLAMA_INTEL_GPU", IntelGpu, "Enable experimental Intel GPU detection"}
}
return ret
}
func Values() map[string]string {
vals := make(map[string]string)
for k, v := range AsMap() {
vals[k] = fmt.Sprintf("%v", v.Value)
}
return vals
}
var defaultAllowOrigins = []string{
"localhost",
"127.0.0.1",
"0.0.0.0",
}
// Clean quotes and spaces from the value
func clean(key string) string {
return strings.Trim(os.Getenv(key), "\"' ")
}
func init() {
// default values
NumParallel = 1
MaxRunners = 1
MaxQueuedRequests = 512
LoadConfig()
}
func LoadConfig() {
if debug := clean("OLLAMA_DEBUG"); debug != "" {
d, err := strconv.ParseBool(debug)
if err == nil {
Debug = d
} else {
Debug = true
}
}
if fa := clean("OLLAMA_FLASH_ATTENTION"); fa != "" {
d, err := strconv.ParseBool(fa)
if err == nil {
FlashAttention = d
}
}
RunnersDir = clean("OLLAMA_RUNNERS_DIR")
if runtime.GOOS == "windows" && RunnersDir == "" {
// On Windows we do not carry the payloads inside the main executable
appExe, err := os.Executable()
if err != nil {
slog.Error("failed to lookup executable path", "error", err)
}
cwd, err := os.Getwd()
if err != nil {
slog.Error("failed to lookup working directory", "error", err)
}
var paths []string
for _, root := range []string{filepath.Dir(appExe), cwd} {
paths = append(paths,
root,
filepath.Join(root, "windows-"+runtime.GOARCH),
filepath.Join(root, "dist", "windows-"+runtime.GOARCH),
)
}
// Try a few variations to improve developer experience when building from source in the local tree
for _, p := range paths {
candidate := filepath.Join(p, "ollama_runners")
_, err := os.Stat(candidate)
if err == nil {
RunnersDir = candidate
break
}
}
if RunnersDir == "" {
slog.Error("unable to locate llm runner directory. Set OLLAMA_RUNNERS_DIR to the location of 'ollama_runners'")
}
}
TmpDir = clean("OLLAMA_TMPDIR")
userLimit := clean("OLLAMA_MAX_VRAM")
if userLimit != "" {
avail, err := strconv.ParseUint(userLimit, 10, 64)
if err != nil {
slog.Error("invalid setting, ignoring", "OLLAMA_MAX_VRAM", userLimit, "error", err)
} else {
MaxVRAM = avail
}
}
LLMLibrary = clean("OLLAMA_LLM_LIBRARY")
if onp := clean("OLLAMA_NUM_PARALLEL"); onp != "" {
val, err := strconv.Atoi(onp)
if err != nil || val <= 0 {
slog.Error("invalid setting must be greater than zero", "OLLAMA_NUM_PARALLEL", onp, "error", err)
} else {
NumParallel = val
}
}
if nohistory := clean("OLLAMA_NOHISTORY"); nohistory != "" {
NoHistory = true
}
if spread := clean("OLLAMA_SCHED_SPREAD"); spread != "" {
s, err := strconv.ParseBool(spread)
if err == nil {
SchedSpread = s
} else {
SchedSpread = true
}
}
if noprune := clean("OLLAMA_NOPRUNE"); noprune != "" {
NoPrune = true
}
if origins := clean("OLLAMA_ORIGINS"); origins != "" {
AllowOrigins = strings.Split(origins, ",")
}
for _, allowOrigin := range defaultAllowOrigins {
AllowOrigins = append(AllowOrigins,
fmt.Sprintf("http://%s", allowOrigin),
fmt.Sprintf("https://%s", allowOrigin),
fmt.Sprintf("http://%s", net.JoinHostPort(allowOrigin, "*")),
fmt.Sprintf("https://%s", net.JoinHostPort(allowOrigin, "*")),
)
}
AllowOrigins = append(AllowOrigins,
"app://*",
"file://*",
"tauri://*",
)
maxRunners := clean("OLLAMA_MAX_LOADED_MODELS")
if maxRunners != "" {
m, err := strconv.Atoi(maxRunners)
if err != nil {
slog.Error("invalid setting", "OLLAMA_MAX_LOADED_MODELS", maxRunners, "error", err)
} else {
MaxRunners = m
}
}
if onp := os.Getenv("OLLAMA_MAX_QUEUE"); onp != "" {
p, err := strconv.Atoi(onp)
if err != nil || p <= 0 {
slog.Error("invalid setting", "OLLAMA_MAX_QUEUE", onp, "error", err)
} else {
MaxQueuedRequests = p
}
}
KeepAlive = clean("OLLAMA_KEEP_ALIVE")
var err error
ModelsDir, err = getModelsDir()
if err != nil {
slog.Error("invalid setting", "OLLAMA_MODELS", ModelsDir, "error", err)
}
Host, err = getOllamaHost()
if err != nil {
slog.Error("invalid setting", "OLLAMA_HOST", Host, "error", err, "using default port", Host.Port)
}
if set, err := strconv.ParseBool(clean("OLLAMA_INTEL_GPU")); err == nil {
IntelGpu = set
}
CudaVisibleDevices = clean("CUDA_VISIBLE_DEVICES")
HipVisibleDevices = clean("HIP_VISIBLE_DEVICES")
RocrVisibleDevices = clean("ROCR_VISIBLE_DEVICES")
GpuDeviceOrdinal = clean("GPU_DEVICE_ORDINAL")
HsaOverrideGfxVersion = clean("HSA_OVERRIDE_GFX_VERSION")
}
func getModelsDir() (string, error) {
if models, exists := os.LookupEnv("OLLAMA_MODELS"); exists {
return models, nil
}
home, err := os.UserHomeDir()
if err != nil {
return "", err
}
return filepath.Join(home, ".ollama", "models"), nil
}
func getOllamaHost() (*OllamaHost, error) {
defaultPort := "11434"
hostVar := os.Getenv("OLLAMA_HOST")
hostVar = strings.TrimSpace(strings.Trim(strings.TrimSpace(hostVar), "\"'"))
scheme, hostport, ok := strings.Cut(hostVar, "://")
switch {
case !ok:
scheme, hostport = "http", hostVar
case scheme == "http":
defaultPort = "80"
case scheme == "https":
defaultPort = "443"
}
// trim trailing slashes
hostport = strings.TrimRight(hostport, "/")
host, port, err := net.SplitHostPort(hostport)
if err != nil {
host, port = "127.0.0.1", defaultPort
if ip := net.ParseIP(strings.Trim(hostport, "[]")); ip != nil {
host = ip.String()
} else if hostport != "" {
host = hostport
}
}
if portNum, err := strconv.ParseInt(port, 10, 32); err != nil || portNum > 65535 || portNum < 0 {
return &OllamaHost{
Scheme: scheme,
Host: host,
Port: defaultPort,
}, ErrInvalidHostPort
}
return &OllamaHost{
Scheme: scheme,
Host: host,
Port: port,
}, nil
}
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