scripts/common_functions.sh

#!/bin/bash

# Function used to return list of node names according
# to given string parameter match criteria
function get_nodes_names {
    # Enforce 1st parameter availability
    if [ -z "$1" ]; then
        match="[0-9]"
    else
        match="$1"
    fi
    salt-call pillar.get linux:network:host --out key | sed 's/:.*//' | grep "$match"
}

# Function used to wait for node availability
# (aka answering to salt pings)
# 1st parameter (mandatory) is number of nodes to wait for
# 2nd parameter (optional) is nodes names to wait for
#    (* = all nodes is default)
function wait_for {
    # Enforce 1st parameter availability
    if [ -z "$1" ]; then
        echo "wait_for function requires at least 1 parameter"
        return 1
    fi
    if [ "$1" -lt "1" ]; then
        echo "wait_for function requires 1st parameter to be number greater than 0 ($1 invalid)"
        return 1
    fi
    wanted=$1
    nodes=${2:-"*"}
    # Default max waiting time is 5mn
    MAX_WAIT=${MAX_WAIT:-300}
    while true; do
        nb_nodes=$(salt "$nodes" test.ping --out txt | grep -c True)
        if [ -n "$nb_nodes" ] && [ "$nb_nodes" -eq "$wanted" ]; then
            echo "All nodes are now answering to salt pings"
            break
        fi
        MAX_WAIT=$(( MAX_WAIT - 15 ))
        if [ $MAX_WAIT -le 0 ]; then
            echo "Only $nb_nodes answering to salt pings out of $wanted after maximum timeout"
            return 2
        fi
        echo -n "Only $nb_nodes answering to salt pings out of $wanted. Waiting a bit longer ..."
        sleep 15
        echo
    done
    return 0
}

# Waits for an HTTP service to be ready
function wait_for_http_service {
    local url=$1
    local timeout=${2:-120}
    local expected_code=${3:-200}

    start=$(date +'%s')
    while [ $(( $(date +'%s') - start )) -lt "$timeout"  ]; do
        code=$(curl -ksL -w '%{http_code}' -o /dev/null "$url")
        if [[ $code == "$expected_code" ]]; then
            echo "$url responded with $code"
            break
        fi
        sleep 1
    done
}

# Returns the value of _param:$1 from the pillar
function get_param_value {
    salt-call pillar.data "_param:$1" --out key | grep "_param:" | awk '{print $2}'
}