Memory check for cscli dashboard setup (#1513)

* Add 1gb recmem variable and use memory module

Since checking the RAM is not required to get the container up and running we can change this to a warn level

cmd/crowdsec-cli/dashboard.go

@@ -1,7 +1,9 @@
 package main
 
 import (
+	"errors"
 	"fmt"
+	"math"
 	"os"
 	"os/exec"
 	"os/user"
@@ -13,6 +15,7 @@ import (
 	"github.com/AlecAivazis/survey/v2"
 	"github.com/crowdsecurity/crowdsec/pkg/metabase"
 
+	"github.com/pbnjay/memory"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
@@ -109,6 +112,22 @@ cscli dashboard setup -l 0.0.0.0 -p 443 --password <password>
 				}
 			}
 			var answer bool
+			if valid, err := checkSystemMemory(); err == nil && !valid {
+				if !forceYes {
+					prompt := &survey.Confirm{
+						Message: "Metabase requires 1-2GB of RAM, your system is below this requirement continue ?",
+						Default: true,
+					}
+					if err := survey.AskOne(prompt, &answer); err != nil {
+						log.Warnf("unable to ask about RAM check: %s", err)
+					}
+					if !answer {
+						log.Fatal("Unable to continue due to RAM requirement")
+					}
+				} else {
+					log.Warnf("Metabase requires 1-2GB of RAM, your system is below this requirement")
+				}
+			}
 			groupExist := false
 			dockerGroup, err := user.LookupGroup(crowdsecGroup)
 			if err == nil {
@@ -304,3 +323,14 @@ func passwordIsValid(password string) bool {
 	return true
 
 }
+
+func checkSystemMemory() (bool, error) {
+	totMem := memory.TotalMemory()
+	if totMem == 0 {
+		return true, errors.New("Unable to get system total memory")
+	}
+	if uint64(math.Pow(2, 30)) >= totMem {
+		return false, nil
+	}
+	return true, nil
+}

go.mod

@@ -144,6 +144,7 @@ require (
 	github.com/oklog/run v1.0.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/opencontainers/image-spec v1.0.2-0.20211117181255-693428a734f5 // indirect
+	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/common v0.30.0 // indirect
 	github.com/prometheus/procfs v0.7.3 // indirect

go.sum

@@ -625,6 +625,8 @@ github.com/oschwald/geoip2-golang v1.4.0/go.mod h1:8QwxJvRImBH+Zl6Aa6MaIcs5YdlZS
 github.com/oschwald/maxminddb-golang v1.6.0/go.mod h1:DUJFucBg2cvqx42YmDa/+xHvb0elJtOm3o4aFQ/nb/w=
 github.com/oschwald/maxminddb-golang v1.8.0 h1:Uh/DSnGoxsyp/KYbY1AuP0tYEwfs0sCph9p/UMXK/Hk=
 github.com/oschwald/maxminddb-golang v1.8.0/go.mod h1:RXZtst0N6+FY/3qCNmZMBApR19cdQj43/NM9VkrNAis=
+github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 h1:onHthvaw9LFnH4t2DcNVpwGmV9E1BkGknEliJkfwQj0=
+github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58/go.mod h1:DXv8WO4yhMYhSNPKjeNKa5WY9YCIEBRbNzFFPJbWO6Y=
 github.com/pborman/uuid v1.2.0/go.mod h1:X/NO0urCmaxf9VXbdlT7C2Yzkj2IKimNn4k+gtPdI/k=
 github.com/pelletier/go-toml v1.4.0/go.mod h1:PN7xzY2wHTK0K9p34ErDQMlFxa51Fk0OUruD3k1mMwo=
 github.com/pelletier/go-toml v1.7.0/go.mod h1:vwGMzjaWMwyfHwgIBhI2YUM4fB6nL6lVAvS1LBMMhTE=