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open-nomad/client/fingerprint/env_aws.go

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spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
package fingerprint
import (
Update client fingerprinters
2016-01-23 02:12:16 +00:00
"fmt"
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
"net/http"
"net/url"
"os"
Refactor some AWS things, removing fingerprint/network.go - move isAWS to env, use in other places - fingerprint/network.go is no empty; removed
2015-09-22 21:31:57 +00:00
"regexp"
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
"strings"
"time"
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/session"
client uses passed logger and fix fingerprinters
2018-09-16 00:48:59 +00:00
log "github.com/hashicorp/go-hclog"
goimports
2019-01-15 19:46:12 +00:00
cleanhttp "github.com/hashicorp/go-cleanhttp"
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
"github.com/hashicorp/nomad/nomad/structs"
)
Speed up client startup
2017-07-21 05:34:24 +00:00
const (
// AwsMetadataTimeout is the timeout used when contacting the AWS metadata
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
// services.
Speed up client startup
2017-07-21 05:34:24 +00:00
AwsMetadataTimeout = 2 * time.Second
)
Use const value for AWS metadata URL
2015-11-03 15:06:14 +00:00
refactoring, docs
2015-09-23 04:51:56 +00:00
// map of instance type to approximate speed, in Mbits/s
Updated AWS speeds and network_speed now overrides This PR: * Makes AWS network speeds more granular * Makes `network_speed` an override and not a default * Adds a default of 1000 MBits if no network link speed is detected. Fixes #1985
2016-11-15 21:55:51 +00:00
// Estimates from http://stackoverflow.com/a/35806587
refactoring, docs
2015-09-23 04:51:56 +00:00
// This data is meant for a loose approximation
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
var ec2NetSpeedTable = map[*regexp.Regexp]int{
Updated AWS speeds and network_speed now overrides This PR: * Makes AWS network speeds more granular * Makes `network_speed` an override and not a default * Adds a default of 1000 MBits if no network link speed is detected. Fixes #1985
2016-11-15 21:55:51 +00:00
regexp.MustCompile("t2.nano"): 30,
regexp.MustCompile("t2.micro"): 70,
regexp.MustCompile("t2.small"): 125,
regexp.MustCompile("t2.medium"): 300,
regexp.MustCompile("m3.medium"): 400,
regexp.MustCompile("c4.8xlarge"): 4000,
regexp.MustCompile("x1.16xlarge"): 5000,
regexp.MustCompile(`.*\.large`): 500,
regexp.MustCompile(`.*\.xlarge`): 750,
regexp.MustCompile(`.*\.2xlarge`): 1000,
regexp.MustCompile(`.*\.4xlarge`): 2000,
regexp.MustCompile(`.*\.8xlarge`): 10000,
regexp.MustCompile(`.*\.10xlarge`): 10000,
regexp.MustCompile(`.*\.16xlarge`): 10000,
regexp.MustCompile(`.*\.32xlarge`): 10000,
Move ec2InstanceSpeed to a package variable, convert to string:int map
2015-09-23 03:04:20 +00:00
}
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
type ec2Specs struct {
mhz float64
cores int
model string
}
func (e ec2Specs) ticks() int {
return int(e.mhz) * e.cores
}
func specs(ghz float64, vCores int, model string) ec2Specs {
return ec2Specs{
mhz: ghz * 1000,
cores: vCores,
model: model,
}
}
// Map of instance type to documented CPU speed.
//
// Most values are taken from https://aws.amazon.com/ec2/instance-types/.
// Values for a1 & m6g (Graviton) are taken from https://en.wikichip.org/wiki/annapurna_labs/alpine/al73400
// Values for inf1 are taken from launching a inf1.xlarge and looking at /proc/cpuinfo
//
// In a few cases, AWS has upgraded the generation of CPU while keeping the same
// instance designation. Since it is possible to launch on the lower performance
// CPU, that one is used as the spec for the instance type.
//
// This table is provided as a best-effort to determine the number of CPU ticks
// available for use by Nomad tasks. If an instance type is missing, the fallback
// behavior is to use values from go-psutil, which is only capable of reading
// "current" CPU MHz.
var ec2ProcSpeedTable = map[string]ec2Specs{
// -- General Purpose --
// a1
"a1.medium": specs(2.3, 1, "AWS Graviton"),
"a1.large": specs(2.3, 2, "AWS Graviton"),
"a1.xlarge": specs(2.3, 4, "AWS Graviton"),
"a1.2xlarge": specs(2.3, 8, "AWS Graviton"),
"a1.4xlarge": specs(2.3, 16, "AWS Graviton"),
"a1.metal": specs(2.3, 16, "AWS Graviton"),
// t3
"t3.nano": specs(2.5, 2, "2.5 GHz Intel Scalable"),
"t3.micro": specs(2.5, 2, "2.5 GHz Intel Scalable"),
"t3.small": specs(2.5, 2, "2.5 GHz Intel Scalable"),
"t3.medium": specs(2.5, 2, "2.5 GHz Intel Scalable"),
"t3.large": specs(2.5, 2, "2.5 GHz Intel Scalable"),
"t3.xlarge": specs(2.5, 4, "2.5 GHz Intel Scalable"),
"t3.2xlarge": specs(2.5, 8, "2.5 GHz Intel Scalable"),
// t3a
"t3a.nano": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"t3a.micro": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"t3a.small": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"t3a.medium": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"t3a.large": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"t3a.xlarge": specs(2.5, 4, "2.5 GHz AMD EPYC 7000 series"),
"t3a.2xlarge": specs(2.5, 8, "2.5 GHz AMD EPYC 7000 series"),
// t2
"t2.nano": specs(3.3, 1, "3.3 GHz Intel Scalable"),
"t2.micro": specs(3.3, 1, "3.3 GHz Intel Scalable"),
"t2.small": specs(3.3, 1, "3.3 GHz Intel Scalable"),
"t2.medium": specs(3.3, 2, "3.3 GHz Intel Scalable"),
"t2.large": specs(3.0, 2, "3.0 GHz Intel Scalable"),
"t2.xlarge": specs(3.0, 4, "3.0 GHz Intel Scalable"),
"t2.2xlarge": specs(3.0, 8, "3.0 GHz Intel Scalable"),
// m6g
"m6g.medium": specs(2.3, 1, "AWS Graviton2 Neoverse"),
"m6g.large": specs(2.3, 2, "AWS Graviton2 Neoverse"),
"m6g.xlarge": specs(2.3, 4, "AWS Graviton2 Neoverse"),
"m6g.2xlarge": specs(2.3, 8, "AWS Graviton2 Neoverse"),
"m6g.4xlarge": specs(2.3, 16, "AWS Graviton2 Neoverse"),
"m6g.8xlarge": specs(2.3, 32, "AWS Graviton2 Neoverse"),
"m6g.12xlarge": specs(2.3, 48, "AWS Graviton2 Neoverse"),
"m6g.16xlarge": specs(2.3, 64, "AWS Graviton2 Neoverse"),
// m5, m5d
"m5.large": specs(3.1, 2, "3.1 GHz Intel Xeon Platinum"),
"m5.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Platinum"),
"m5.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Platinum"),
"m5.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Platinum"),
"m5.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Platinum"),
"m5.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Platinum"),
"m5.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Platinum"),
"m5.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum"),
"m5.metal": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum"),
"m5d.large": specs(3.1, 2, "3.1 GHz Intel Xeon Platinum"),
"m5d.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Platinum"),
"m5d.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Platinum"),
"m5d.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Platinum"),
"m5d.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Platinum"),
"m5d.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Platinum"),
"m5d.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Platinum"),
"m5d.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum"),
"m5d.metal": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum"),
// m5a, m5ad
"m5a.large": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"m5a.xlarge": specs(2.5, 4, "2.5 GHz AMD EPYC 7000 series"),
"m5a.2xlarge": specs(2.5, 8, "2.5 GHz AMD EPYC 7000 series"),
"m5a.4xlarge": specs(2.5, 16, "2.5 GHz AMD EPYC 7000 series"),
"m5a.8xlarge": specs(2.5, 32, "2.5 GHz AMD EPYC 7000 series"),
"m5a.12xlarge": specs(2.5, 48, "2.5 GHz AMD EPYC 7000 series"),
"m5a.16xlarge": specs(2.5, 64, "2.5 GHz AMD EPYC 7000 series"),
"m5a.24xlarge": specs(2.5, 96, "2.5 GHz AMD EPYC 7000 series"),
"m5ad.large": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"m5ad.xlarge": specs(2.5, 4, "2.5 GHz AMD EPYC 7000 series"),
"m5ad.2xlarge": specs(2.5, 8, "2.5 GHz AMD EPYC 7000 series"),
"m5ad.4xlarge": specs(2.5, 16, "2.5 GHz AMD EPYC 7000 series"),
"m5ad.12xlarge": specs(2.5, 48, "2.5 GHz AMD EPYC 7000 series"),
"m5ad.24xlarge": specs(2.5, 96, "2.5 GHz AMD EPYC 7000 series"),
// m5n, m5dn
"m5n.large": specs(3.1, 2, "3.1 GHz Intel Xeon Scalable"),
"m5n.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Scalable"),
"m5n.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Scalable"),
"m5n.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Scalable"),
"m5n.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Scalable"),
"m5n.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Scalable"),
"m5n.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Scalable"),
"m5n.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Scalable"),
"m5dn.large": specs(3.1, 2, "3.1 GHz Intel Xeon Scalable"),
"m5dn.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Scalable"),
"m5dn.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Scalable"),
"m5dn.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Scalable"),
"m5dn.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Scalable"),
"m5dn.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Scalable"),
"m5dn.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Scalable"),
"m5dn.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Scalable"),
// m4
"m4.large": specs(2.3, 2, "2.3 GHz Intel Xeon® E5-2686 v4"),
"m4.xlarge": specs(2.3, 4, "2.3 GHz Intel Xeon® E5-2686 v4"),
"m4.2xlarge": specs(2.3, 8, "2.3 GHz Intel Xeon® E5-2686 v4"),
"m4.4xlarge": specs(2.3, 16, "2.3 GHz Intel Xeon® E5-2686 v4"),
"m4.10xlarge": specs(2.3, 40, "2.3 GHz Intel Xeon® E5-2686 v4"),
"m4.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon® E5-2686 v4"),
// -- Compute Optimized --
// c5, c5d
"c5.large": specs(3.4, 2, "3.4 GHz Intel Xeon Platinum 8000"),
"c5.xlarge": specs(3.4, 4, "3.4 GHz Intel Xeon Platinum 8000"),
"c5.2xlarge": specs(3.4, 8, "3.4 GHz Intel Xeon Platinum 8000"),
"c5.4xlarge": specs(3.4, 16, "3.4 GHz Intel Xeon Platinum 8000"),
"c5.9xlarge": specs(3.4, 36, "3.4 GHz Intel Xeon Platinum 8000"),
"c5.12xlarge": specs(3.6, 48, "3.6 GHz Intel Xeon Scalable"),
"c5.18xlarge": specs(3.6, 72, "3.6 GHz Intel Xeon Scalable"),
"c5.24xlarge": specs(3.6, 96, "3.6 GHz Intel Xeon Scalable"),
"c5.metal": specs(3.6, 96, "3.6 GHz Intel Xeon Scalable"),
"c5d.large": specs(3.4, 2, "3.4 GHz Intel Xeon Platinum 8000"),
"c5d.xlarge": specs(3.4, 4, "3.4 GHz Intel Xeon Platinum 8000"),
"c5d.2xlarge": specs(3.4, 8, "3.4 GHz Intel Xeon Platinum 8000"),
"c5d.4xlarge": specs(3.4, 16, "3.4 GHz Intel Xeon Platinum 8000"),
"c5d.9xlarge": specs(3.4, 36, "3.4 GHz Intel Xeon Platinum 8000"),
"c5d.12xlarge": specs(3.6, 48, "3.6 GHz Intel Xeon Scalable"),
"c5d.18xlarge": specs(3.6, 72, "3.6 GHz Intel Xeon Scalable"),
"c5d.24xlarge": specs(3.6, 96, "3.6 GHz Intel Xeon Scalable"),
"c5d.metal": specs(3.6, 96, "3.6 GHz Intel Xeon Scalable"),
// c5n
"c5n.large": specs(3.0, 2, "3.0 GHz Intel Xeon Platinum"),
"c5n.xlarge": specs(3.0, 4, "3.0 GHz Intel Xeon Platinum"),
"c5n.2xlarge": specs(3.0, 8, "3.0 GHz Intel Xeon Platinum"),
"c5n.4xlarge": specs(3.0, 16, "3.0 GHz Intel Xeon Platinum"),
"c5n.9xlarge": specs(3.0, 36, "3.0 GHz Intel Xeon Platinum"),
"c5n.18xlarge": specs(3.0, 72, "3.0 GHz Intel Xeon Platinum"),
"c5n.metal": specs(3.0, 72, "3.0 GHz Intel Xeon Platinum"),
// c4
"c4.large": specs(2.9, 2, "2.9 GHz Intel Xeon E5-2666 v3"),
"c4.xlarge": specs(2.9, 4, "2.9 GHz Intel Xeon E5-2666 v3"),
"c4.2xlarge": specs(2.9, 8, "2.9 GHz Intel Xeon E5-2666 v3"),
"c4.4xlarge": specs(2.9, 16, "2.9 GHz Intel Xeon E5-2666 v3"),
"c4.8xlarge": specs(2.9, 36, "2.9 GHz Intel Xeon E5-2666 v3"),
// -- Memory Optimized --
// r5, r5d
"r5.large": specs(3.1, 2, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum 8175"),
"r5.metal": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.large": specs(3.1, 2, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum 8175"),
"r5d.metal": specs(3.1, 96, "3.1 GHz Intel Xeon Platinum 8175"),
// r5a, r5ad
"r5a.large": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"r5a.xlarge": specs(2.5, 4, "2.5 GHz AMD EPYC 7000 series"),
"r5a.2xlarge": specs(2.5, 8, "2.5 GHz AMD EPYC 7000 series"),
"r5a.4xlarge": specs(2.5, 16, "2.5 GHz AMD EPYC 7000 series"),
"r5a.8xlarge": specs(2.5, 32, "2.5 GHz AMD EPYC 7000 series"),
"r5a.12xlarge": specs(2.5, 48, "2.5 GHz AMD EPYC 7000 series"),
"r5a.16xlarge": specs(2.5, 64, "2.5 GHz AMD EPYC 7000 series"),
"r5a.24xlarge": specs(2.5, 96, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.large": specs(2.5, 2, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.xlarge": specs(2.5, 4, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.2xlarge": specs(2.5, 8, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.4xlarge": specs(2.5, 16, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.8xlarge": specs(2.5, 32, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.12xlarge": specs(2.5, 48, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.16xlarge": specs(2.5, 64, "2.5 GHz AMD EPYC 7000 series"),
"r5ad.24xlarge": specs(2.5, 96, "2.5 GHz AMD EPYC 7000 series"),
// r5n
"r5n.large": specs(3.1, 2, "3.1 GHz Intel Xeon Scalable"),
"r5n.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Scalable"),
"r5n.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Scalable"),
"r5n.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Scalable"),
"r5n.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Scalable"),
"r5n.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Scalable"),
"r5n.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Scalable"),
"r5n.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Scalable"),
"r5dn.large": specs(3.1, 2, "3.1 GHz Intel Xeon Scalable"),
"r5dn.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Scalable"),
"r5dn.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Scalable"),
"r5dn.4xlarge": specs(3.1, 16, "3.1 GHz Intel Xeon Scalable"),
"r5dn.8xlarge": specs(3.1, 32, "3.1 GHz Intel Xeon Scalable"),
"r5dn.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Scalable"),
"r5dn.16xlarge": specs(3.1, 64, "3.1 GHz Intel Xeon Scalable"),
"r5dn.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Scalable"),
// r4
"r4.large": specs(2.3, 2, "2.3 GHz Intel Xeon E5-2686 v4"),
"r4.xlarge": specs(2.3, 4, "2.3 GHz Intel Xeon E5-2686 v4"),
"r4.2xlarge": specs(2.3, 8, "2.3 GHz Intel Xeon E5-2686 v4"),
"r4.4xlarge": specs(2.3, 16, "2.3 GHz Intel Xeon E5-2686 v4"),
"r4.8xlarge": specs(2.3, 32, "2.3 GHz Intel Xeon E5-2686 v4"),
"r4.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E5-2686 v4"),
// x1e
"x1e.xlarge": specs(2.3, 4, "2.3 GHz Intel Xeon E7-8880 v3"),
"x1e.2xlarge": specs(2.3, 8, "2.3 GHz Intel Xeon E7-8880 v3"),
"x1e.4xlarge": specs(2.3, 16, "2.3 GHz Intel Xeon E7-8880 v3"),
"x1e.8xlarge": specs(2.3, 32, "2.3 GHz Intel Xeon E7-8880 v3"),
"x1e.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E7-8880 v3"),
"x1e.32xlarge": specs(2.3, 128, "2.3 GHz Intel Xeon E7-8880 v3"),
// x1
"x1.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E7-8880 v3"),
"x1.32xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E7-8880 v3"),
// high-memory
"u-6tb1.metal": specs(2.1, 448, "2.1 GHz Intel Xeon Platinum 8176M"),
"u-9tb1.metal": specs(2.1, 448, "2.1 GHz Intel Xeon Platinum 8176M"),
"u-12tb1.metal": specs(2.1, 448, "2.1 GHz Intel Xeon Platinum 8176M"),
"u-18tb1.metal": specs(2.7, 448, "2.7 GHz Intel Xeon Scalable"),
"u-24tb1.metal": specs(2.7, 448, "2.7 GHz Intel Xeon Scalable"),
// z1d
"z1d.large": specs(4.0, 2, "4.0 GHz Intel Xeon Scalable"),
"z1d.xlarge": specs(4.0, 4, "4.0 GHz Intel Xeon Scalable"),
"z1d.2xlarge": specs(4.0, 8, "4.0 GHz Intel Xeon Scalable"),
"z1d.3xlarge": specs(4.0, 12, "4.0 GHz Intel Xeon Scalable"),
"z1d.6xlarge": specs(4.0, 24, "4.0 GHz Intel Xeon Scalable"),
"z1d.12xlarge": specs(4.0, 48, "4.0 GHz Intel Xeon Scalable"),
"z1d.metal": specs(4.0, 48, "4.0 GHz Intel Xeon Scalable"),
// -- Accelerated Computing --
// p3, p3dn
"p3.2xlarge": specs(2.3, 8, "2.3 GHz Intel Xeon E5-2686 v4"),
"p3.8xlarge": specs(2.3, 32, "2.3 GHz Intel Xeon E5-2686 v4"),
"p3.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E5-2686 v4"),
"p3dn.24xlarge": specs(2.5, 96, "2.5 GHz Intel Xeon P-8175M"),
// p2
"p2.xlarge": specs(2.3, 4, "2.3 GHz Intel Xeon E5-2686 v4"),
"p2.8xlarge": specs(2.3, 32, "2.3 GHz Intel Xeon E5-2686 v4"),
"p2.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E5-2686 v4"),
// inf1
"inf1.xlarge": specs(3.0, 4, "3.0 GHz Intel Xeon Platinum 8275CL"),
"inf1.2xlarge": specs(3.0, 8, "3.0 GHz Intel Xeon Platinum 8275CL"),
"inf1.6xlarge": specs(3.0, 24, "3.0 GHz Intel Xeon Platinum 8275CL"),
"inf1.24xlarge": specs(3.0, 96, "3.0 GHz Intel Xeon Platinum 8275CL"),
// g4dn
"g4dn.xlarge": specs(2.5, 4, "2.5 GHz Cascade Lake 24C"),
"g4dn.2xlarge": specs(2.5, 8, "2.5 GHz Cascade Lake 24C"),
"g4dn.4xlarge": specs(2.5, 16, "2.5 GHz Cascade Lake 24C"),
"g4dn.8xlarge": specs(2.5, 32, "2.5 GHz Cascade Lake 24C"),
"g4dn.16xlarge": specs(2.5, 64, "2.5 GHz Cascade Lake 24C"),
"g4dn.12xlarge": specs(2.5, 48, "2.5 GHz Cascade Lake 24C"),
"g4dn.metal": specs(2.5, 96, "2.5 GHz Cascade Lake 24C"),
// g3
"g3s.xlarge": specs(2.3, 4, "2.3 GHz Intel Xeon E5-2686 v4"),
"g3s.4xlarge": specs(2.3, 16, "2.3 GHz Intel Xeon E5-2686 v4"),
"g3s.8xlarge": specs(2.3, 32, "2.3 GHz Intel Xeon E5-2686 v4"),
"g3s.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E5-2686 v4"),
// f1
"f1.2xlarge": specs(2.3, 8, "Intel Xeon E5-2686 v4"),
"f1.4xlarge": specs(2.3, 16, "Intel Xeon E5-2686 v4"),
"f1.16xlarge": specs(2.3, 64, "Intel Xeon E5-2686 v4"),
// -- Storage Optimized --
// i3
"i3.large": specs(2.3, 2, "2.3 GHz Intel Xeon E5 2686 v4"),
"i3.xlarge": specs(2.3, 4, "2.3 GHz Intel Xeon E5 2686 v4"),
"i3.2xlarge": specs(2.3, 8, "2.3 GHz Intel Xeon E5 2686 v4"),
"i3.4xlarge": specs(2.3, 16, "2.3 GHz Intel Xeon E5 2686 v4"),
"i3.8xlarge": specs(2.3, 32, "2.3 GHz Intel Xeon E5 2686 v4"),
"i3.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E5 2686 v4"),
"i3.metal": specs(2.3, 72, "2.3 GHz Intel Xeon E5 2686 v4"),
// i3en
"i3en.large": specs(3.1, 2, "3.1 GHz Intel Xeon Scalable"),
"i3en.xlarge": specs(3.1, 4, "3.1 GHz Intel Xeon Scalable"),
"i3en.2xlarge": specs(3.1, 8, "3.1 GHz Intel Xeon Scalable"),
"i3en.3xlarge": specs(3.1, 12, "3.1 GHz Intel Xeon Scalable"),
"i3en.6xlarge": specs(3.1, 24, "3.1 GHz Intel Xeon Scalable"),
"i3en.12xlarge": specs(3.1, 48, "3.1 GHz Intel Xeon Scalable"),
"i3en.24xlarge": specs(3.1, 96, "3.1 GHz Intel Xeon Scalable"),
"i3en.metal": specs(3.1, 96, "3.1 GHz Intel Xeon Scalable"),
// d2
"d2.xlarge": specs(2.4, 4, "2.4 GHz Intel Xeon E5-2676 v3"),
"d2.2xlarge": specs(2.4, 8, "2.4 GHz Intel Xeon E5-2676 v3"),
"d2.4xlarge": specs(2.4, 16, "2.4 GHz Intel Xeon E5-2676 v3"),
"d2.8xlarge": specs(2.4, 36, "2.4 GHz Intel Xeon E5-2676 v3"),
// h1
"h1.2xlarge": specs(2.3, 8, "2.3 GHz Intel Xeon E5 2686 v4"),
"h1.4xlarge": specs(2.3, 16, "2.3 GHz Intel Xeon E5 2686 v4"),
"h1.8xlarge": specs(2.3, 32, "2.3 GHz Intel Xeon E5 2686 v4"),
"h1.16xlarge": specs(2.3, 64, "2.3 GHz Intel Xeon E5 2686 v4"),
}
Fix old comments and other syntax cleanup
2015-10-12 21:56:33 +00:00
// EnvAWSFingerprint is used to fingerprint AWS metadata
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
type EnvAWSFingerprint struct {
Merge fix
2015-11-05 21:46:02 +00:00
StaticFingerprinter
fingerprint code refactor Some code cleanup: * Use a field for setting EC2 metadata instead of env-vars in testing; but keep environment variables for backward compatibility reasons * Update tests to use testify
2019-11-26 15:26:25 +00:00
// endpoint for EC2 metadata as expected by AWS SDK
endpoint string
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
logger log.Logger
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
}
Fix old comments and other syntax cleanup
2015-10-12 21:56:33 +00:00
// NewEnvAWSFingerprint is used to create a fingerprint from AWS metadata
client uses passed logger and fix fingerprinters
2018-09-16 00:48:59 +00:00
func NewEnvAWSFingerprint(logger log.Logger) Fingerprint {
Speed up client startup
2017-07-21 05:34:24 +00:00
f := &EnvAWSFingerprint{
fingerprint code refactor Some code cleanup: * Use a field for setting EC2 metadata instead of env-vars in testing; but keep environment variables for backward compatibility reasons * Update tests to use testify
2019-11-26 15:26:25 +00:00
logger: logger.Named("env_aws"),
endpoint: strings.TrimSuffix(os.Getenv("AWS_ENV_URL"), "/meta-data/"),
Speed up client startup
2017-07-21 05:34:24 +00:00
}
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
return f
}
client: Move fingerprint structs to pkg This removes a cyclical dependency when importing client/structs from dependencies of the plugin_loader, specifically, drivers. Due to client/config also depending on the plugin_loader. It also better reflects the ownership of fingerprint structs, as they are fairly internal to the fingerprint manager.
2018-12-01 16:10:39 +00:00
func (f *EnvAWSFingerprint) Fingerprint(request *FingerprintRequest, response *FingerprintResponse) error {
refactor Fingerprint to request/response construct
2018-01-24 14:09:53 +00:00
cfg := request.Config
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
timeout := AwsMetadataTimeout
Speed up client startup
2017-07-21 05:34:24 +00:00
// Check if we should tighten the timeout
if cfg.ReadBoolDefault(TightenNetworkTimeoutsConfig, false) {
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
timeout = 1 * time.Millisecond
Speed up client startup
2017-07-21 05:34:24 +00:00
}
env_aws: Disable Retries and set Session cfg Previously, Nomad used hand rolled HTTP requests to interact with the EC2 metadata API. Recently however, we switched to using the AWS SDK for this fingerprinting. The default behaviour of the AWS SDK is to perform retries with exponential backoff when a request fails. This is problematic for Nomad, because interacting with the EC2 API is in our client start path. Here we revert to our pre-existing behaviour of not performing retries in the fast path, as if the metadata service is unavailable, it's likely that nomad is not running in AWS.
2019-12-16 09:56:32 +00:00
ec2meta, err := ec2MetaClient(f.endpoint, timeout)
if err != nil {
Update client/fingerprint/env_aws.go Co-Authored-By: Mahmood Ali <mahmood@hashicorp.com>
2019-12-16 13:48:52 +00:00
return fmt.Errorf("failed to setup ec2Metadata client: %v", err)
env_aws: Disable Retries and set Session cfg Previously, Nomad used hand rolled HTTP requests to interact with the EC2 metadata API. Recently however, we switched to using the AWS SDK for this fingerprinting. The default behaviour of the AWS SDK is to perform retries with exponential backoff when a request fails. This is problematic for Nomad, because interacting with the EC2 API is in our client start path. Here we revert to our pre-existing behaviour of not performing retries in the fast path, as if the metadata service is unavailable, it's likely that nomad is not running in AWS.
2019-12-16 09:56:32 +00:00
}
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
if !isAWS(ec2meta) {
refactor Fingerprint to request/response construct
2018-01-24 14:09:53 +00:00
return nil
Refactor some AWS things, removing fingerprint/network.go - move isAWS to env, use in other places - fingerprint/network.go is no empty; removed
2015-09-22 21:31:57 +00:00
}
populate node network resource
2015-09-23 04:22:23 +00:00
Respond to comments
2016-01-26 22:55:38 +00:00
// Keys and whether they should be namespaced as unique. Any key whose value
// uniquely identifies a node, such as ip, should be marked as unique. When
// marked as unique, the key isn't included in the computed node class.
keys := map[string]bool{
AMI ID is potentally non-unique Changed the keys map to reflect that.
2017-08-09 16:53:54 +00:00
"ami-id": false,
Respond to comments
2016-01-26 22:55:38 +00:00
"hostname": true,
"instance-id": true,
"instance-type": false,
"local-hostname": true,
"local-ipv4": true,
"public-hostname": true,
"public-ipv4": true,
"placement/availability-zone": false,
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
}
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
Respond to comments
2016-01-26 22:55:38 +00:00
for k, unique := range keys {
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
resp, err := ec2meta.GetMetadata(k)
fixup! tests: Add tests for EC2 Metadata immitation cases
2020-03-26 15:37:54 +00:00
v := strings.TrimSpace(resp)
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
if v == "" {
f.logger.Debug("read an empty value", "attribute", k)
continue
} else if awsErr, ok := err.(awserr.RequestFailure); ok {
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
f.logger.Debug("could not read attribute value", "attribute", k, "error", awsErr)
continue
} else if awsErr, ok := err.(awserr.Error); ok {
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
// if it's a URL error, assume we're not in an AWS environment
// TODO: better way to detect AWS? Check xen virtualization?
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
if _, ok := awsErr.OrigErr().(*url.Error); ok {
refactor Fingerprint to request/response construct
2018-01-24 14:09:53 +00:00
return nil
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
}
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
// not sure what other errors it would return
refactor Fingerprint to request/response construct
2018-01-24 14:09:53 +00:00
return err
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
}
// assume we want blank entries
Update client fingerprinters
2016-01-23 02:12:16 +00:00
key := "platform.aws." + strings.Replace(k, "/", ".", -1)
Respond to comments
2016-01-26 22:55:38 +00:00
if unique {
Update client fingerprinters
2016-01-23 02:12:16 +00:00
key = structs.UniqueNamespace(key)
}
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
response.AddAttribute(key, v)
fingerprint/aws: Add 2 basic links, rename 'env' to 'platform'
2015-08-31 19:18:40 +00:00
}
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
// accumulate resource information, then assign to response
var resources *structs.Resources
var nodeResources *structs.NodeResources
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
populate node network resource
2015-09-23 04:22:23 +00:00
// copy over network specific information
add applicable boolean to fingerprint response public fields and remove getter functions
2018-01-30 17:57:37 +00:00
if val, ok := response.Attributes["unique.platform.aws.local-ipv4"]; ok && val != "" {
create safe getters and setters for fingerprint response
2018-01-26 16:21:07 +00:00
response.AddAttribute("unique.network.ip-address", val)
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
nodeResources = new(structs.NodeResources)
nodeResources.Networks = []*structs.NetworkResource{
{
Device: "eth0",
IP: val,
CIDR: val + "/32",
MBits: f.throughput(request, ec2meta, val),
},
Updated AWS speeds and network_speed now overrides This PR: * Makes AWS network speeds more granular * Makes `network_speed` an override and not a default * Adds a default of 1000 MBits if no network link speed is detected. Fixes #1985
2016-11-15 21:55:51 +00:00
}
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
}
// copy over CPU speed information
if specs := f.lookupCPU(ec2meta); specs != nil {
response.AddAttribute("cpu.modelname", specs.model)
response.AddAttribute("cpu.frequency", fmt.Sprintf("%.0f", specs.mhz))
response.AddAttribute("cpu.numcores", fmt.Sprintf("%d", specs.cores))
env_aws: combine 3 log lines into 1
2020-04-29 16:47:36 +00:00
f.logger.Debug("lookup ec2 cpu", "cores", specs.cores, "MHz", log.Fmt("%.0f", specs.mhz), "model", specs.model)
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
if ticks := specs.ticks(); request.Config.CpuCompute <= 0 {
response.AddAttribute("cpu.totalcompute", fmt.Sprintf("%d", ticks))
f.logger.Debug("setting ec2 cpu ticks", "ticks", ticks)
resources = new(structs.Resources)
resources.CPU = ticks
if nodeResources == nil {
nodeResources = new(structs.NodeResources)
}
nodeResources.Cpu = structs.NodeCpuResources{CpuShares: int64(ticks)}
Updated AWS speeds and network_speed now overrides This PR: * Makes AWS network speeds more granular * Makes `network_speed` an override and not a default * Adds a default of 1000 MBits if no network link speed is detected. Fixes #1985
2016-11-15 21:55:51 +00:00
}
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
} else {
env_aws: fixup log line Co-Authored-By: Mahmood Ali <mahmood@hashicorp.com>
2020-04-29 16:33:53 +00:00
f.logger.Warn("failed to find the cpu specification for this instance type")
Consolidate the AWS fingerprinters
2015-09-22 21:56:04 +00:00
}
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
response.Resources = resources
response.NodeResources = nodeResources
populate node network resource
2015-09-23 04:22:23 +00:00
// populate Links
create safe getters and setters for fingerprint response
2018-01-26 16:21:07 +00:00
response.AddLink("aws.ec2", fmt.Sprintf("%s.%s",
add applicable boolean to fingerprint response public fields and remove getter functions
2018-01-30 17:57:37 +00:00
response.Attributes["platform.aws.placement.availability-zone"],
response.Attributes["unique.platform.aws.instance-id"]))
code review fixup
2018-01-31 22:03:55 +00:00
response.Detected = true
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
refactor Fingerprint to request/response construct
2018-01-24 14:09:53 +00:00
return nil
spike on AWS ENV fingerprint
2015-08-28 16:31:20 +00:00
}
Refactor some AWS things, removing fingerprint/network.go - move isAWS to env, use in other places - fingerprint/network.go is no empty; removed
2015-09-22 21:31:57 +00:00
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
func (f *EnvAWSFingerprint) instanceType(ec2meta *ec2metadata.EC2Metadata) (string, error) {
response, err := ec2meta.GetMetadata("instance-type")
if err != nil {
return "", err
}
return strings.TrimSpace(response), nil
}
func (f *EnvAWSFingerprint) lookupCPU(ec2meta *ec2metadata.EC2Metadata) *ec2Specs {
instanceType, err := f.instanceType(ec2meta)
if err != nil {
env_aws: downgrade log line Co-Authored-By: Mahmood Ali <mahmood@hashicorp.com>
2020-04-29 16:34:26 +00:00
f.logger.Warn("failed to read EC2 metadata instance-type", "error", err)
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
return nil
}
for iType, specs := range ec2ProcSpeedTable {
if strings.EqualFold(iType, instanceType) {
return &specs
}
}
return nil
}
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
func (f *EnvAWSFingerprint) throughput(request *FingerprintRequest, ec2meta *ec2metadata.EC2Metadata, ip string) int {
throughput := request.Config.NetworkSpeed
if throughput != 0 {
return throughput
}
throughput = f.linkSpeed(ec2meta)
if throughput != 0 {
return throughput
}
if request.Node.Resources != nil && len(request.Node.Resources.Networks) > 0 {
for _, n := range request.Node.Resources.Networks {
if n.IP == ip {
return n.MBits
}
}
}
return defaultNetworkSpeed
}
refactoring, docs
2015-09-23 04:51:56 +00:00
// EnvAWSFingerprint uses lookup table to approximate network speeds
fingerprint: use ec2metadata package
2019-11-25 20:00:50 +00:00
func (f *EnvAWSFingerprint) linkSpeed(ec2meta *ec2metadata.EC2Metadata) int {
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
instanceType, err := f.instanceType(ec2meta)
Enable more linters
2017-09-26 22:26:33 +00:00
if err != nil {
client uses passed logger and fix fingerprinters
2018-09-16 00:48:59 +00:00
f.logger.Error("error reading instance-type", "error", err)
Enable more linters
2017-09-26 22:26:33 +00:00
return 0
}
Updated AWS speeds and network_speed now overrides This PR: * Makes AWS network speeds more granular * Makes `network_speed` an override and not a default * Adds a default of 1000 MBits if no network link speed is detected. Fixes #1985
2016-11-15 21:55:51 +00:00
netSpeed := 0
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
for reg, speed := range ec2NetSpeedTable {
if reg.MatchString(instanceType) {
Updated AWS speeds and network_speed now overrides This PR: * Makes AWS network speeds more granular * Makes `network_speed` an override and not a default * Adds a default of 1000 MBits if no network link speed is detected. Fixes #1985
2016-11-15 21:55:51 +00:00
netSpeed = speed
break
}
Consolidate the AWS fingerprinters
2015-09-22 21:56:04 +00:00
}
Updated AWS speeds and network_speed now overrides This PR: * Makes AWS network speeds more granular * Makes `network_speed` an override and not a default * Adds a default of 1000 MBits if no network link speed is detected. Fixes #1985
2016-11-15 21:55:51 +00:00
return netSpeed
Consolidate the AWS fingerprinters
2015-09-22 21:56:04 +00:00
}
fingerprint code refactor Some code cleanup: * Use a field for setting EC2 metadata instead of env-vars in testing; but keep environment variables for backward compatibility reasons * Update tests to use testify
2019-11-26 15:26:25 +00:00
env_aws: Disable Retries and set Session cfg Previously, Nomad used hand rolled HTTP requests to interact with the EC2 metadata API. Recently however, we switched to using the AWS SDK for this fingerprinting. The default behaviour of the AWS SDK is to perform retries with exponential backoff when a request fails. This is problematic for Nomad, because interacting with the EC2 API is in our client start path. Here we revert to our pre-existing behaviour of not performing retries in the fast path, as if the metadata service is unavailable, it's likely that nomad is not running in AWS.
2019-12-16 09:56:32 +00:00
func ec2MetaClient(endpoint string, timeout time.Duration) (*ec2metadata.EC2Metadata, error) {
fingerprint code refactor Some code cleanup: * Use a field for setting EC2 metadata instead of env-vars in testing; but keep environment variables for backward compatibility reasons * Update tests to use testify
2019-11-26 15:26:25 +00:00
client := &http.Client{
Timeout: timeout,
Transport: cleanhttp.DefaultTransport(),
}
env_aws: Disable Retries and set Session cfg Previously, Nomad used hand rolled HTTP requests to interact with the EC2 metadata API. Recently however, we switched to using the AWS SDK for this fingerprinting. The default behaviour of the AWS SDK is to perform retries with exponential backoff when a request fails. This is problematic for Nomad, because interacting with the EC2 API is in our client start path. Here we revert to our pre-existing behaviour of not performing retries in the fast path, as if the metadata service is unavailable, it's likely that nomad is not running in AWS.
2019-12-16 09:56:32 +00:00
c := aws.NewConfig().WithHTTPClient(client).WithMaxRetries(0)
fingerprint code refactor Some code cleanup: * Use a field for setting EC2 metadata instead of env-vars in testing; but keep environment variables for backward compatibility reasons * Update tests to use testify
2019-11-26 15:26:25 +00:00
if endpoint != "" {
c = c.WithEndpoint(endpoint)
}
env_aws: Disable Retries and set Session cfg Previously, Nomad used hand rolled HTTP requests to interact with the EC2 metadata API. Recently however, we switched to using the AWS SDK for this fingerprinting. The default behaviour of the AWS SDK is to perform retries with exponential backoff when a request fails. This is problematic for Nomad, because interacting with the EC2 API is in our client start path. Here we revert to our pre-existing behaviour of not performing retries in the fast path, as if the metadata service is unavailable, it's likely that nomad is not running in AWS.
2019-12-16 09:56:32 +00:00
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
sess, err := session.NewSession(c)
env_aws: Disable Retries and set Session cfg Previously, Nomad used hand rolled HTTP requests to interact with the EC2 metadata API. Recently however, we switched to using the AWS SDK for this fingerprinting. The default behaviour of the AWS SDK is to perform retries with exponential backoff when a request fails. This is problematic for Nomad, because interacting with the EC2 API is in our client start path. Here we revert to our pre-existing behaviour of not performing retries in the fast path, as if the metadata service is unavailable, it's likely that nomad is not running in AWS.
2019-12-16 09:56:32 +00:00
if err != nil {
return nil, err
}
env_aws: use best-effort lookup table for CPU performance in EC2 Fixes #7681 The current behavior of the CPU fingerprinter in AWS is that it reads the **current** speed from `/proc/cpuinfo` (`CPU MHz` field). This is because the max CPU frequency is not available by reading anything on the EC2 instance itself. Normally on Linux one would look at e.g. `sys/devices/system/cpu/cpuN/cpufreq/cpuinfo_max_freq` or perhaps parse the values from the `CPU max MHz` field in `/proc/cpuinfo`, but those values are not available. Furthermore, no metadata about the CPU is made available in the EC2 metadata service. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Since `go-psutil` cannot determine the max CPU speed it defaults to the current CPU speed, which could be basically any number between 0 and the true max. This is particularly bad on large, powerful reserved instances which often idle at ~800 MHz while Nomad does its fingerprinting (typically IO bound), which Nomad then uses as the max, which results in severe loss of available resources. Since the CPU specification is unavailable programmatically (at least not without sudo) use a best-effort lookup table. This table was generated by going through every instance type in AWS documentation and copy-pasting the numbers. https://aws.amazon.com/ec2/instance-types/ This approach obviously is not ideal as future instance types will need to be added as they are introduced to AWS. However, using the table should only be an improvement over the status quo since right now Nomad miscalculates available CPU resources on all instance types.
2020-04-28 04:04:49 +00:00
return ec2metadata.New(sess, c), nil
fingerprint code refactor Some code cleanup: * Use a field for setting EC2 metadata instead of env-vars in testing; but keep environment variables for backward compatibility reasons * Update tests to use testify
2019-11-26 15:26:25 +00:00
}
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
func isAWS(ec2meta *ec2metadata.EC2Metadata) bool {
v, err := ec2meta.GetMetadata("ami-id")
fixup! tests: Add tests for EC2 Metadata immitation cases
2020-03-26 15:37:54 +00:00
v = strings.TrimSpace(v)
fingerprint: handle incomplete AWS immitation APIs Fix a regression where we accidentally started treating non-AWS environments as AWS environments, resulting in bad networking settings. Two factors some at play: First, in [1], we accidentally switched the ultimate AWS test from checking `ami-id` to `instance-id`. This means that nomad started treating more environments as AWS; e.g. Hetzner implements `instance-id` but not `ami-id`. Second, some of these environments return empty values instead of errors! Hetzner returns empty 200 response for `local-ipv4`, resulting into bad networking configuration. This change fix the situation by restoring the check to `ami-id` and ensuring that we only set network configuration when the ip address is not-empty. Also, be more defensive around response whitespace input. [1] https://github.com/hashicorp/nomad/pull/6779
2020-03-26 15:16:16 +00:00
return err == nil && v != ""
}