#!/usr/bin/env bash #shellcheck disable=SC2001 # netdata # real-time performance and health monitoring, done right! # (C) 2016 Costa Tsaousis # SPDX-License-Identifier: GPL-3.0-or-later # # Script to find a better name for cgroups # export PATH="${PATH}:/sbin:/usr/sbin:/usr/local/sbin" export LC_ALL=C # ----------------------------------------------------------------------------- PROGRAM_NAME="$(basename "${0}")" logdate() { date "+%Y-%m-%d %H:%M:%S" } log() { local status="${1}" shift echo >&2 "$(logdate): ${PROGRAM_NAME}: ${status}: ${*}" } warning() { log WARNING "${@}" } error() { log ERROR "${@}" } info() { log INFO "${@}" } fatal() { log FATAL "${@}" exit 1 } function docker_like_get_name_command() { local command="${1}" local id="${2}" info "Running command: ${command} ps --filter=id=\"${id}\" --format=\"{{.Names}}\"" NAME="$(${command} ps --filter=id="${id}" --format="{{.Names}}")" return 0 } function docker_like_get_name_api() { local host_var="${1}" local host="${!host_var}" local path="/containers/${2}/json" if [ -z "${host}" ]; then warning "No ${host_var} is set" return 1 fi if ! command -v jq >/dev/null 2>&1; then warning "Can't find jq command line tool. jq is required for netdata to retrieve container name using ${host} API, falling back to docker ps" return 1 fi if [ -S "${host}" ]; then info "Running API command: curl --unix-socket \"${host}\" http://localhost${path}" JSON=$(curl -sS --unix-socket "${host}" "http://localhost${path}") else info "Running API command: curl \"${host}${path}\"" JSON=$(curl -sS "${host}${path}") fi NAME=$(echo "${JSON}" | jq -r .Name,.Config.Hostname | grep -v null | head -n1 | sed 's|^/||') return 0 } function k8s_get_name() { if [[ "${1}" =~ ^kube.*_pod.*$ ]]; then local id="${1##*_pod}" else # Take the last part of the delimited path identifier (expecting either _ or / as a delimiter). local id="${1##*_}" if [ "${id}" == "${1}" ]; then id="${1##*/}" fi fi if command -v jq >/dev/null 2>&1; then if [ -n "${KUBERNETES_SERVICE_HOST}" ] && [ -n "${KUBERNETES_PORT_443_TCP_PORT}" ]; then KUBE_TOKEN="$(/dev/null 2>&1 && command -v kubectl >/dev/null 2>&1; then if [[ -z ${KUBE_CONFIG+x} ]]; then KUBE_CONFIG="/etc/kubernetes/admin.conf" fi if kubectl --kubeconfig=$KUBE_CONFIG get pod --all-namespaces >/dev/null 2>&1; then #shellcheck disable=SC2086 NAME="$(kubectl --kubeconfig=$KUBE_CONFIG get pod --all-namespaces --output='json' | jq -r '.items[] | "k8s_\(.metadata.namespace)_\(.metadata.name)_\(.metadata.uid)_" + (.status.containerStatuses[]? | "\(.name) \(.containerID)")' | grep "$id" | cut -d' ' -f1 )" else warning "kubectl cannot get pod list, check for configuration file in $KUBE_CONFIG, or set this path to env \$KUBE_CONFIG" fi fi else warning "jq command not available, k8s_get_name() cannot execute. Please install jq should you wish for k8s to be fully functional" fi if [ -z "${NAME}" ]; then warning "cannot find the name of k8s pod with containerID '${id}'. Setting name to ${id} and disabling it" NAME="${id}" NAME_NOT_FOUND=3 else info "k8s containerID '${id}' has chart name (namespace_podname_poduid_containername) '${NAME}'" fi } function docker_get_name() { local id="${1}" if hash docker 2>/dev/null; then docker_like_get_name_command docker "${id}" else docker_like_get_name_api DOCKER_HOST "${id}" || docker_like_get_name_command podman "${id}" fi if [ -z "${NAME}" ]; then warning "cannot find the name of docker container '${id}'" NAME_NOT_FOUND=2 NAME="${id:0:12}" else info "docker container '${id}' is named '${NAME}'" fi } function docker_validate_id() { local id="${1}" if [ -n "${id}" ] && { [ ${#id} -eq 64 ] || [ ${#id} -eq 12 ]; }; then docker_get_name "${id}" else error "a docker id cannot be extracted from docker cgroup '${CGROUP}'." fi } function podman_get_name() { local id="${1}" # for Podman, prefer using the API if we can, as netdata will not normally have access # to other users' containers, so they will not be visible when running `podman ps` docker_like_get_name_api PODMAN_HOST "${id}" || docker_like_get_name_command podman "${id}" if [ -z "${NAME}" ]; then warning "cannot find the name of podman container '${id}'" NAME_NOT_FOUND=2 NAME="${id:0:12}" else info "podman container '${id}' is named '${NAME}'" fi } function podman_validate_id() { local id="${1}" if [ -n "${id}" ] && [ ${#id} -eq 64 ]; then podman_get_name "${id}" else error "a podman id cannot be extracted from docker cgroup '${CGROUP}'." fi } # ----------------------------------------------------------------------------- [ -z "${NETDATA_USER_CONFIG_DIR}" ] && NETDATA_USER_CONFIG_DIR="@configdir_POST@" [ -z "${NETDATA_STOCK_CONFIG_DIR}" ] && NETDATA_STOCK_CONFIG_DIR="@libconfigdir_POST@" DOCKER_HOST="${DOCKER_HOST:=/var/run/docker.sock}" PODMAN_HOST="${PODMAN_HOST:=/run/podman/podman.sock}" CGROUP="${1}" NAME_NOT_FOUND=0 NAME= # ----------------------------------------------------------------------------- if [ -z "${CGROUP}" ]; then fatal "called without a cgroup name. Nothing to do." fi for CONFIG in "${NETDATA_USER_CONFIG_DIR}/cgroups-names.conf" "${NETDATA_STOCK_CONFIG_DIR}/cgroups-names.conf"; do if [ -f "${CONFIG}" ]; then NAME="$(grep "^${CGROUP} " "${CONFIG}" | sed 's/[[:space:]]\+/ /g' | cut -d ' ' -f 2)" if [ -z "${NAME}" ]; then info "cannot find cgroup '${CGROUP}' in '${CONFIG}'." else break fi #else # info "configuration file '${CONFIG}' is not available." fi done if [ -z "${NAME}" ]; then if [[ ${CGROUP} =~ ^.*kubepods.* ]]; then k8s_get_name "${CGROUP}" fi fi if [ -z "${NAME}" ]; then if [[ ${CGROUP} =~ ^.*docker[-_/\.][a-fA-F0-9]+[-_\.]?.*$ ]]; then # docker containers #shellcheck disable=SC1117 DOCKERID="$(echo "${CGROUP}" | sed "s|^.*docker[-_/]\([a-fA-F0-9]\+\)[-_\.]\?.*$|\1|")" docker_validate_id "${DOCKERID}" elif [[ ${CGROUP} =~ ^.*ecs[-_/\.][a-fA-F0-9]+[-_\.]?.*$ ]]; then # ECS #shellcheck disable=SC1117 DOCKERID="$(echo "${CGROUP}" | sed "s|^.*ecs[-_/].*[-_/]\([a-fA-F0-9]\+\)[-_\.]\?.*$|\1|")" docker_validate_id "${DOCKERID}" elif [[ ${CGROUP} =~ ^.*libpod-[a-fA-F0-9]+.*$ ]]; then # Podman PODMANID="$(echo "${CGROUP}" | sed "s|^.*libpod-\([a-fA-F0-9]\+\).*$|\1|")" podman_validate_id "${PODMANID}" elif [[ ${CGROUP} =~ machine.slice[_/].*\.service ]]; then # systemd-nspawn NAME="$(echo "${CGROUP}" | sed 's/.*machine.slice[_\/]\(.*\)\.service/\1/g')" elif [[ ${CGROUP} =~ machine.slice_machine.*-qemu ]]; then # libvirtd / qemu virtual machines # NAME="$(echo ${CGROUP} | sed 's/machine.slice_machine.*-qemu//; s/\/x2d//; s/\/x2d/\-/g; s/\.scope//g')" NAME="qemu_$(echo "${CGROUP}" | sed 's/machine.slice_machine.*-qemu//; s/\/x2d[[:digit:]]*//; s/\/x2d//g; s/\.scope//g')" elif [[ ${CGROUP} =~ machine_.*\.libvirt-qemu ]]; then # libvirtd / qemu virtual machines NAME="qemu_$(echo "${CGROUP}" | sed 's/^machine_//; s/\.libvirt-qemu$//; s/-/_/;')" elif [[ ${CGROUP} =~ qemu.slice_([0-9]+).scope && -d /etc/pve ]]; then # Proxmox VMs FILENAME="/etc/pve/qemu-server/${BASH_REMATCH[1]}.conf" if [[ -f $FILENAME && -r $FILENAME ]]; then NAME="qemu_$(grep -e '^name: ' "/etc/pve/qemu-server/${BASH_REMATCH[1]}.conf" | head -1 | sed -rn 's|\s*name\s*:\s*(.*)?$|\1|p')" else error "proxmox config file missing ${FILENAME} or netdata does not have read access. Please ensure netdata is a member of www-data group." fi elif [[ ${CGROUP} =~ lxc_([0-9]+) && -d /etc/pve ]]; then # Proxmox Containers (LXC) FILENAME="/etc/pve/lxc/${BASH_REMATCH[1]}.conf" if [[ -f ${FILENAME} && -r ${FILENAME} ]]; then NAME=$(grep -e '^hostname: ' "/etc/pve/lxc/${BASH_REMATCH[1]}.conf" | head -1 | sed -rn 's|\s*hostname\s*:\s*(.*)?$|\1|p') else error "proxmox config file missing ${FILENAME} or netdata does not have read access. Please ensure netdata is a member of www-data group." fi elif [[ ${CGROUP} =~ lxc.payload.* ]]; then # LXC 4.0 NAME="$(echo "${CGROUP}" | sed 's/lxc\.payload\.\(.*\)/\1/g')" fi [ -z "${NAME}" ] && NAME="${CGROUP}" [ ${#NAME} -gt 100 ] && NAME="${NAME:0:100}" fi info "cgroup '${CGROUP}' is called '${NAME}'" echo "${NAME}" exit ${NAME_NOT_FOUND}