go-pkg/asynqmon
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Allow using environment variables to set options

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Hugo Fonseca 2021-12-14 00:35:10 +00:00 committed by GitHub
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2 changed files with 47 additions and 20 deletions
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20
README.md
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@ -83,16 +83,16 @@ Here's the available flags:
_Note_: Use `--redis-url` to specify address, db-number, and password with one flag value; Alternatively, use `--redis-addr`, `--redis-db`, and `--redis-password` to specify each value.
| Flag | Description | Default |
| ------------------------------- | ------------------------------------------------------------------- | ---------------- |
| `--port`(int) | port number to use for web ui server | 8080 |
| `---redis-url`(string) | URL to redis server | "" |
| `--redis-addr`(string) | address of redis server to connect to | "127.0.0.1:6379" |
| `--redis-db`(int) | redis database number | 0 |
| `--redis-password`(string) | password to use when connecting to redis server | "" |
| `--redis-cluster-nodes`(string) | comma separated list of host:port addresses of cluster nodes | "" |
| `--redis-tls`(string) | server name for TLS validation used when connecting to redis server | "" |
| `--redis-insecure-tls`(bool) | disable TLS certificate host checks | false |
| Flag | Env | Description | Default |
| ------------------------------- | --------------------- | ------------------------------------------------------------------- | ---------------- |
| `--port`(int) | `PORT` | port number to use for web ui server | 8080 |
| `---redis-url`(string) | `REDIS_URL` | URL to redis server | "" |
| `--redis-addr`(string) | `REDIS_ADDR` | address of redis server to connect to | "127.0.0.1:6379" |
| `--redis-db`(int) | `REDIS_DB` | redis database number | 0 |
| `--redis-password`(string) | `REDIS_PASSWORD` | password to use when connecting to redis server | "" |
| `--redis-cluster-nodes`(string) | `REDIS_CLUSTER_NODES` | comma separated list of host:port addresses of cluster nodes | "" |
| `--redis-tls`(string) | `REDIS_TLS` | server name for TLS validation used when connecting to redis server | "" |
| `--redis-insecure-tls`(bool) | `REDIS_INSECURE_TLS` | disable TLS certificate host checks | false |
### Examples

47
cmd/asynqmon/main.go
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@ -6,6 +6,8 @@ import (
"fmt"
"log"
"net/http"
"os"
"strconv"
"strings"
"time"
@ -31,16 +33,16 @@ var (
)
func init() {
flag.IntVar(&flagPort, "port", 8080, "port number to use for web ui server")
flag.StringVar(&flagRedisAddr, "redis-addr", "127.0.0.1:6379", "address of redis server to connect to")
flag.IntVar(&flagRedisDB, "redis-db", 0, "redis database number")
flag.StringVar(&flagRedisPassword, "redis-password", "", "password to use when connecting to redis server")
flag.StringVar(&flagRedisTLS, "redis-tls", "", "server name for TLS validation used when connecting to redis server")
flag.StringVar(&flagRedisURL, "redis-url", "", "URL to redis server")
flag.BoolVar(&flagRedisInsecureTLS, "redis-insecure-tls", false, "disable TLS certificate host checks")
flag.StringVar(&flagRedisClusterNodes, "redis-cluster-nodes", "", "comma separated list of host:port addresses of cluster nodes")
flag.IntVar(&flagMaxPayloadLength, "max-payload-length", 200, "maximum number of utf8 characters printed in the payload cell in the Web UI")
flag.IntVar(&flagMaxResultLength, "max-result-length", 200, "maximum number of utf8 characters printed in the result cell in the Web UI")
flag.IntVar(&flagPort, "port", getEnvOrDefaultInt("PORT", 8080), "port number to use for web ui server")
flag.StringVar(&flagRedisAddr, "redis-addr", getEnvDefaultString("REDIS_ADDR", "127.0.0.1:6379"), "address of redis server to connect to")
flag.IntVar(&flagRedisDB, "redis-db", getEnvOrDefaultInt("REDIS_DB", 0), "redis database number")
flag.StringVar(&flagRedisPassword, "redis-password", getEnvDefaultString("REDIS_PASSWORD", ""), "password to use when connecting to redis server")
flag.StringVar(&flagRedisTLS, "redis-tls", getEnvDefaultString("REDIS_TLS",""), "server name for TLS validation used when connecting to redis server")
flag.StringVar(&flagRedisURL, "redis-url", getEnvDefaultString("REDIS_URL", ""), "URL to redis server")
flag.BoolVar(&flagRedisInsecureTLS, "redis-insecure-tls", getEnvOrDefaultBool("REDIS_INSECURE_TLS", false), "disable TLS certificate host checks")
flag.StringVar(&flagRedisClusterNodes, "redis-cluster-nodes", getEnvDefaultString("REDIS_CLUSTER_NODES", ""), "comma separated list of host:port addresses of cluster nodes")
flag.IntVar(&flagMaxPayloadLength, "max-payload-length", getEnvOrDefaultInt("MAX_PAYLOAD_LENGTH", 200), "maximum number of utf8 characters printed in the payload cell in the Web UI")
flag.IntVar(&flagMaxResultLength, "max-result-length", getEnvOrDefaultInt("MAX_RESULT_LENGTH", 200), "maximum number of utf8 characters printed in the result cell in the Web UI")
}
// TODO: Write test and refactor this code.
@ -144,3 +146,28 @@ func truncate(s string, limit int) string {
}
return s
}
func getEnvDefaultString(key, def string) string {
v := os.Getenv(key)
if (v == "") {
return def
}
return v
}
func getEnvOrDefaultInt(key string, def int) int {
v, err := strconv.Atoi(os.Getenv(key))
if (err != nil) {
return def
}
return v
}
func getEnvOrDefaultBool(key string, def bool) bool {
v, err := strconv.ParseBool(os.Getenv(key))
if (err != nil) {
return def
}
return v
}