installers/osm_health.sh

   1 #!/usr/bin/env bash
   2
   3 #   Copyright 2020 Telefónica Investigación y Desarrollo S.A.U.
   4 #
   5 #   Licensed under the Apache License, Version 2.0 (the "License");
   6 #   you may not use this file except in compliance with the License.
   7 #   You may obtain a copy of the License at
   8 #
   9 #       http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 #   Unless required by applicable law or agreed to in writing, software
  12 #   distributed under the License is distributed on an "AS IS" BASIS,
  13 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 #   See the License for the specific language governing permissions and
  15 #   limitations under the License.
  16
  17 # Default values
  18 sampling_period=5       # seconds
  19 time_for_readiness=2    # minutes ready
  20 time_for_failure=7      # minutes broken
  21 KUBERNETES=             # By default, assumes Docker Swarm installation
  22 STACK_NAME=osm          # By default, "osm"
  23
  24 while getopts "p:r:f:s:k" o; do
  25     case "${o}" in
  26         p)
  27             sampling_period=${OPTARG}
  28             ;;
  29         r)
  30             time_for_readiness=${OPTARG}
  31             ;;
  32         f)
  33             time_for_failure=${OPTARG}
  34             ;;
  35         s)
  36             STACK_NAME=${OPTARG}
  37             ;;
  38         k)
  39             KUBERNETES="y"
  40             ;;
  41     esac
  42 done
  43
  44 oks_threshold=$((time_for_readiness*60/${sampling_period}))     # No. ok samples to declare the system ready
  45 failures_threshold=$((time_for_failure*60/${sampling_period}))  # No. nok samples to declare the system broken
  46 failures_in_a_row=0
  47 oks_in_a_row=0
  48
  49
  50 ####################################################################################
  51 # Loop to check system readiness
  52 ####################################################################################
  53 while [[ (${failures_in_a_row} -lt ${failures_threshold}) && (${oks_in_a_row} -lt ${oks_threshold}) ]]
  54 do
  55
  56     #------------ CHECKS FOR KUBERNETES INSTALLATION
  57     if [ -n "$KUBERNETES" ]
  58     then
  59
  60         # State of Deployments
  61         DEPLOYMENTS_STATE=$(kubectl get deployment -n ${STACK_NAME} --no-headers 2>&1)
  62         DEPLOYMENTS_READY=$(echo "${DEPLOYMENTS_STATE}" | awk '$2=="1/1" && $4=="1" {printf ("%20s\t%s\t%s\n", $1, $2, $4)}')
  63         DEPLOYMENTS_NOT_READY=$(echo "${DEPLOYMENTS_STATE}" | awk '$2!="1/1" || $4!="1" {printf ("%20s\t%s\t%s\n", $1, $2, $4)}')
  64         COUNT_DEPLOYMENTS_READY=$(echo "${DEPLOYMENTS_READY}"| grep -v -e '^$' | wc -l)
  65         COUNT_DEPLOYMENTS_NOT_READY=$(echo "${DEPLOYMENTS_NOT_READY}" | grep -v -e '^$' | wc -l)
  66
  67         # State of Statefulsets
  68         STS_STATE=$(kubectl get statefulset -n ${STACK_NAME} --no-headers 2>&1)
  69         STS_READY=$(echo "${STS_STATE}" | awk '$2=="1/1" {printf ("%20s\t%s\t%s\n", $1, $2, $4)}')
  70         STS_NOT_READY=$(echo "${STS_STATE}" | awk '$2!="1/1" {printf ("%20s\t%s\t%s\n", $1, $2, $4)}')
  71         COUNT_STS_READY=$(echo "${STS_READY}" | grep -v -e '^$' | wc -l)
  72         COUNT_STS_NOT_READY=$(echo "${STS_NOT_READY}" | grep -v -e '^$' | wc -l)
  73
  74         # OK sample
  75         if [[ $((${COUNT_DEPLOYMENTS_NOT_READY}+${COUNT_STS_NOT_READY})) -eq 0 ]]
  76         then
  77             ((++oks_in_a_row))
  78             failures_in_a_row=0
  79             echo -ne ===\> Successful checks: "${oks_in_a_row}"/${oks_threshold}\\r
  80         # NOK sample
  81         else
  82             ((++failures_in_a_row))
  83             oks_in_a_row=0
  84             echo
  85             echo Bootstraping... "${failures_in_a_row}" attempts of ${failures_threshold}
  86
  87             # Reports failed deployments
  88             if [[ "${COUNT_DEPLOYMENTS_NOT_READY}" -ne 0 ]]
  89             then
  90                 echo ${COUNT_DEPLOYMENTS_NOT_READY} of $((${COUNT_DEPLOYMENTS_NOT_READY}+${COUNT_DEPLOYMENTS_READY})) deployments starting:
  91                 echo "${DEPLOYMENTS_NOT_READY}"
  92                 echo
  93             fi
  94
  95             # Reports failed statefulsets
  96             if [[ "${COUNT_STS_NOT_READY}" -ne 0 ]]
  97             then
  98                 echo ${COUNT_STS_NOT_READY} of $((${COUNT_STS_NOT_READY}+${COUNT_STS_READY})) statefulsets starting:
  99                 echo "${STS_NOT_READY}"
 100                 echo
 101             fi
 102         fi
 103
 104     #------------ CHECKS FOR DOCKER SWARM INSTALLATION
 105     else
 106         # State of Docker Services
 107         SERVICES_STATE=$(sg docker -c "docker service ls" 2>&1 | grep " ${STACK_NAME}_")
 108         SERVICES_READY=$(echo "${SERVICES_STATE}" | awk '$3=="replicated" && $4=="1/1" {printf ("%20s\t%s\n", $2, $4)}')
 109         SERVICES_NOT_READY=$(echo "${SERVICES_STATE}" | awk '$3=="replicated" && $4!="1/1" {printf ("%20s\t%s\n", $2, $4)}')
 110         COUNT_SERVICES_READY=$(echo "${SERVICES_READY}" | grep -v -e '^$' | wc -l)
 111         COUNT_SERVICES_NOT_READY=$(echo "${SERVICES_NOT_READY}" | grep -v -e '^$' | wc -l)
 112
 113         # OK sample
 114         if [[ ${COUNT_SERVICES_NOT_READY} -eq 0 ]]
 115         then
 116             ((++oks_in_a_row))
 117             failures_in_a_row=0
 118             echo -ne ===\> Successful checks: "${oks_in_a_row}"/${oks_threshold}\\r
 119         # NOK sample
 120         else
 121             ((++failures_in_a_row))
 122             oks_in_a_row=0
 123             echo
 124             echo Bootstraping...  "${failures_in_a_row}" attempts of ${failures_threshold}
 125             echo ${COUNT_SERVICES_NOT_READY} of $((${COUNT_SERVICES_NOT_READY}+${COUNT_SERVICES_READY})) services starting:
 126             echo "${SERVICES_NOT_READY}"
 127         fi
 128     fi
 129
 130     #------------ NEXT SAMPLE
 131     sleep ${sampling_period}
 132
 133 done
 134
 135
 136 ####################################################################################
 137 # OUTCOME
 138 ####################################################################################
 139 if [[ (${failures_in_a_row} -ge ${failures_threshold}) ]]
 140 then
 141     echo
 142     echo SYSTEM IS BROKEN
 143     exit 1
 144 else
 145     echo
 146     echo SYSTEM IS READY
 147 fi