Juan C. Mancebo juanmancebo
juanmancebo
/ get_pod_usage_and_requests.sh
Created
July 21, 2025 16:50
Get pod cpu/memory usage vs requests to identify possible missconfigurations.
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| #!/bin/bash | |
| { | |
| echo -e "NAMESPACE\tPOD\tCPU_REQ(m)\tCPU_USAGE(m)\tMEM_REQ(Mi)\tMEM_USAGE(Mi)" | |
| for ns in <NAMESPACE1> <NAMESPACE2>; do | |
| kubectl top pods -n "$ns" --no-headers | while read pod cpu_usage mem_usage; do | |
| cpu_req=$(kubectl get pod "$pod" -n "$ns" -o jsonpath='{.spec.containers[*].resources.requests.cpu}' | \ | |
| awk '{sum=0; for(i=1;i<=NF;i++) { val=$i; if(val ~ /m$/) {val=val+0} else {val=val*1000} sum+=val;} print sum}') | |
| mem_req=$(kubectl get pod "$pod" -n "$ns" -o jsonpath='{.spec.containers[*].resources.requests.memory}' | \ | |
| awk '{sum=0; for(i=1;i<=NF;i++) { val=$i; if(val ~ /Mi$/) {val=val+0} else if(val ~ /Ki$/) {val=val/1024} else if(val ~ /Gi$/) {val=val*1024} sum+=val;} print sum}') |
juanmancebo
/ get_container_image_labels.sh
Created
November 22, 2024 16:57
Get container image labels
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| #!/bin/sh | |
| export IMAGE=<YOUR CONTAINER IMAGE> | |
| echo $(docker inspect --format '{{range $key,$value := .Config.Labels}}{{$key}}={{$value}}\n{{end}}' ${IMAGE}) | |
| ##alternative using jq | |
| docker inspect ${IMAGE}) |jq -r '.[0].Config.Labels' |
juanmancebo
/ eks_logs_queries
Created
July 14, 2024 14:50
CloudWatch Logs Insights - EKS control plane useful queries
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| Doc. https://repost.aws/knowledge-center/eks-get-control-plane-logs | |
| ## get all events related with a specific object | |
| fields @timestamp, user.username as user,userAgent, verb as action, objectRef.namespace as namespace, objectRef.resource as kind , objectRef.name as name, responseStatus.code as exit_code, responseObject.status as exit_status, responseObject.message as exit_message | |
| | filter @logStream like /^kube-apiserver-audit/ | |
| | filter strcontains(objectRef.name,"coredns") | |
| | filter strcontains(objectRef.resource,"pod") | |
| | sort @timestamp desc | |
| ## get events kubectl update resource |
juanmancebo
/ vpc_flow_logs_queries
Created
July 14, 2024 14:46
CloudWatch Logs Insights - VPC flow logs useful queries
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| #Doc. https://repost.aws/knowledge-center/vpc-flow-logs-and-cloudwatch-logs-insights | |
| fields @timestamp, srcAddr, dstAddr, dstPort, action | |
| | sort @timestamp desc | |
| | filter srcAddr="10.89.6.237" | |
| | filter dstPort="443" |
juanmancebo
/ get_ecr_login_without_docker.sh
Created
July 14, 2024 14:39
login ECR without docker. Useful when you need to generate docker auth but you don't have docker binary
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| #!/bin/sh | |
| ACCOUNT_ID=<AWS ACCOUNT ID> | |
| REGION=eu-west-1 | |
| REGISTRY=${ACCOUNT_ID}.dkr.ecr.${REGION}.amazonaws.com | |
| aws ecr get-login-password| jq -n --arg token "$(</dev/stdin)" --arg repo "$REPO" '{"auths":{($repo):{"auth":$token}}}' > ~/.docker/config.json |
juanmancebo
/ remove_github_actions_caches.sh
Created
July 14, 2024 14:29
Remove all GitHub Actions caches from a given repository
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| #!/bin/ssh | |
| # doc. https://docs.github.com/en/rest/actions/cache?apiVersion=2022-11-28 | |
| GITHUB_TOKEN=<YOUR GITHUB TOKEN> | |
| OWNER=<GITHUB REPO OWNER> | |
| REPO=<GITHUB REPO NAME> | |
| for CACHE_ID in $(curl -L -X GET -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${GITHUB_TOKEN}" -H "X-GitHub-Api-Version: 2022-11-28" "https://api.github.com/repos/${OWNER}/${REPO}/actions/caches?per_page=100" |jq '.actions_caches[].id');do curl -I -X DELETE -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${GITHUB_TOKEN}" -H "X-GitHub-Api-Version: 2022-11-28" "https://api.github.com/repos/${OWNER}/${REPO}/actions/caches/$CACHE_ID";done |
juanmancebo
/ get_github_private_repo_release.sh
Last active
July 14, 2024 14:39
Download release from GitHub private repo
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| #!/bin/sh | |
| # doc. https://docs.github.com/en/rest/releases/assets?apiVersion=2022-11-28#get-a-release-asset | |
| GITHUB_TOKEN=<YOUR GITHUB TOKEN> | |
| OWNER=<GITHUB REPO OWNER> | |
| REPO=<GITHUB REPO NAME> | |
| VERSION=<GITHUB RELEASE VERSION> | |
| ASSET_URL=$(wget --quiet -O - \ | |
| --header="Accept: application/vnd.github+json" \ |
juanmancebo
/ helm_get_latest_helm_chart_ecr.sh
Created
July 14, 2024 13:53
Get latest helm chart version from OCI-based registries. Example with ECR
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| #!/bin/sh | |
| #Doc. https://helm.sh/docs/topics/registries/#using-an-oci-based-registry | |
| CHART_REPO=<HELM CHART REPO NAME> | |
| ACCOUNT_ID=<AWS ACCOUNT ID> | |
| REGION=eu-west-1 | |
| REGISTRY=${ACCOUNT_ID}.dkr.ecr.${REGION}.amazonaws.com | |
| #helm login | |
| aws ecr get-login-password | helm registry login --username AWS --password-stdin ${REGISTRY} |
juanmancebo
/ git_count_lines_code.sh
Created
July 14, 2024 13:28
Given two git commit hash, count lines of code reduction.
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| #!/bin/sh | |
| COMMIT_1=$1 | |
| COMMIT_2=$2 | |
| count_lines () { | |
| git checkout $1 2>/dev/null && git ls-files | xargs wc -l |tail -1 |awk '{print $1}' | |
| } | |
| LINES_1=$(count_lines ${COMMIT_1}) | |
| LINES_2=$(count_lines ${COMMIT_2}) |
juanmancebo
/ prometheus_api_cheat_sheet.sh
Created
July 14, 2024 11:04
Useful requests to Prometheus API
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| ## get targets from API | |
| # https://prometheus.io/docs/prometheus/latest/querying/api/#targets | |
| wget -qO- http://127.0.0.1:9090/api/v1/targets |jq -r '.data.activeTargets[].discoveredLabels.instance' | |
| ## get metrics | |
| # https://prometheus.io/docs/prometheus/latest/querying/api/#querying-label-values | |
| wget -qO- http://127.0.0.1:9090/api/v1/label/__name__/values | jq -r ".data[]" | sort | |
| ## get metric data. | |
| # https://prometheus.io/docs/prometheus/latest/querying/api/#instant-queries | |
| wget -qO- http://127.0.0.1:9090/api/v1/query --data-urlencode 'query=<METRIC NAME>' |jq |
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